4,854 results match your criteria Chemical Reviews [Journal]


Hydrogels and Hydrogel-Derived Materials for Energy and Water Sustainability.

Chem Rev 2020 Jul 8. Epub 2020 Jul 8.

Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States.

Energy and water are of fundamental importance for our modern society, and advanced technologies on sustainable energy storage and conversion as well as water resource management are in the focus of intensive research worldwide. Beyond their traditional biological applications, hydrogels are emerging as an appealing materials platform for energy- and water-related applications owing to their attractive and tailorable physiochemical properties. In this review, we highlight the highly tunable synthesis of various hydrogels, involving key synthetic elements such as monomer/polymer building blocks, cross-linkers, and functional additives, and discuss how hydrogels can be employed as precursors and templates for architecting three-dimensional frameworks of electrochemically active materials. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00345DOI Listing

C-C Bond Cleavages of Cyclopropenes: Operating for Selective Ring-Opening Reactions.

Authors:
Rubén Vicente

Chem Rev 2020 Jul 8. Epub 2020 Jul 8.

Facultad de Quı́mica, Departamento de Quı́mica Orgánica e Inorgánica, Instituto de Quı́mica Organometálica Enrique Moles, Universidad de Oviedo, 33006 Oviedo, Spain.

This review highlights key reactivities relying on C-C bond cleavages of cyclopropenes. Metal-catalyzed and metal-free transformations are covered in reactions involving direct ring-opening processes or transformations through nonisolable cyclopropane intermediates generated from cyclopropenes. Special emphasis is on the synthetic utility and mechanistic aspects of methodologies discussed along the revision. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00151DOI Listing

Metal-Catalyzed Carbon-Carbon Bond Cleavage of Unstrained Alcohols.

Chem Rev 2020 Jul 8. Epub 2020 Jul 8.

ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093 Zürich, Switzerland.

The functionalization of molecules by cleaving inert carbon-carbon single bonds is regarded as a great synthetic challenge due to their inherent stability. In recent years, significant progress has been made in the activation of small rings relying on the release of strain energy. By contrast, the number of catalytic methodologies for the activation of unstrained carbon-carbon single bonds is still limited. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00154DOI Listing

Mechanisms of Stereodirecting Participation and Ester Migration from Near and Far in Glycosylation and Related Reactions.

Chem Rev 2020 Jul 5. Epub 2020 Jul 5.

Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States.

This review is the counterpart of a 2018 Chemical Reviews article (Adero, P. O.; Amarasekara, H. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00243DOI Listing

Advanced Thermoelectric Design: From Materials and Structures to Devices.

Chem Rev 2020 Jul 2. Epub 2020 Jul 2.

Centre for Future Materials, University of Southern Queensland, Springfield Central, Queensland 4300, Australia.

The long-standing popularity of thermoelectric materials has contributed to the creation of various thermoelectric devices and stimulated the development of strategies to improve their thermoelectric performance. In this review, we aim to comprehensively summarize the state-of-the-art strategies for the realization of high-performance thermoelectric materials and devices by establishing the links between synthesis, structural characteristics, properties, underlying chemistry and physics, including structural design (point defects, dislocations, interfaces, inclusions, and pores), multidimensional design (quantum dots/wires, nanoparticles, nanowires, nano- or microbelts, few-layered nanosheets, nano- or microplates, thin films, single crystals, and polycrystalline bulks), and advanced device design (thermoelectric modules, miniature generators and coolers, and flexible thermoelectric generators). The outline of each strategy starts with a concise presentation of their fundamentals and carefully selected examples. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00026DOI Listing

MOF-Based Membranes for Gas Separations.

Chem Rev 2020 Jul 1. Epub 2020 Jul 1.

Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

Metal-organic frameworks (MOFs) represent the largest known class of porous crystalline materials ever synthesized. Their narrow pore windows and nearly unlimited structural and chemical features have made these materials of significant interest for membrane-based gas separations. In this comprehensive review, we discuss opportunities and challenges related to the formation of pure MOF films and mixed-matrix membranes (MMMs). Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00119DOI Listing

FeCrAl as a Catalyst Support.

Chem Rev 2020 Jun 30. Epub 2020 Jun 30.

Chemical Engineering Department, École Polytechnique de Montréal, 2900 Boulevard Édourd-Montpetit, Montréal H3T 1J4, Canada.

The iron-chromium-aluminum alloy (FeCrAl) is an exceptional support for highly exothermic and endothermic reactions that operate above 700 °C in chemically aggressive environments, where low heat and mass transfer rates limit reaction yield. FeCrAl two- and three-dimensional structured networks-monoliths, foams, and fibers-maximize mass transfer rates, while their remarkable thermal conductivity minimizes hot spots and thermal gradients. Another advantage of the open FeCrAl structure is the low pressure drop due to the high void fraction and regularity of the internal path. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00149DOI Listing

Interfaces and Interphases in All-Solid-State Batteries with Inorganic Solid Electrolytes.

Chem Rev 2020 Jun 30. Epub 2020 Jun 30.

Department of NanoEngineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States.

All-solid-state batteries (ASSBs) have attracted enormous attention as one of the critical future technologies for safe and high energy batteries. With the emergence of several highly conductive solid electrolytes in recent years, the bottleneck is no longer Li-ion diffusion within the electrolyte. Instead, many ASSBs are limited by their low Coulombic efficiency, poor power performance, and short cycling life due to the high resistance at the interfaces within ASSBs. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00101DOI Listing

Vibrational Spectroscopic Map, Vibrational Spectroscopy, and Intermolecular Interaction.

Chem Rev 2020 Jun 29. Epub 2020 Jun 29.

Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706-1396, United States.

Vibrational spectroscopy is an essential tool in chemical analyses, biological assays, and studies of functional materials. Over the past decade, various coherent nonlinear vibrational spectroscopic techniques have been developed and enabled researchers to study time-correlations of the fluctuating frequencies that are directly related to solute-solvent dynamics, dynamical changes in molecular conformations and local electrostatic environments, chemical and biochemical reactions, protein structural dynamics and functions, characteristic processes of functional materials, and so on. In order to gain incisive and quantitative information on the local electrostatic environment, molecular conformation, protein structure and interprotein contacts, ligand binding kinetics, and electric and optical properties of functional materials, a variety of vibrational probes have been developed and site-specifically incorporated into molecular, biological, and material systems for time-resolved vibrational spectroscopic investigation. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00813DOI Listing

Methodologies and Strategies for Selective Borylation of C-Het and C-C Bonds.

Chem Rev 2020 Jun 29. Epub 2020 Jun 29.

State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.

Organoborons have emerged as versatile building blocks in organic synthesis to achieve molecular diversity and as carboxylic acid bioisosteres with broad applicability in drug discovery. Traditionally, these compounds are prepared by the substitution of Grignard/lithium reagents with electrophilic boron species and Brown hydroboration. Recent developments have provided new routes for the efficient preparation of organoborons by applying reactions using chemical feedstocks with leaving groups. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00384DOI Listing

Pseudocapacitance: From Fundamental Understanding to High Power Energy Storage Materials.

Chem Rev 2020 Jun 28. Epub 2020 Jun 28.

Department of Materials Science & Engineering, North Carolina State University, Raleigh, North Carolina 27606, United States.

There is an urgent global need for electrochemical energy storage that includes materials that can provide simultaneous high power and high energy density. One strategy to achieve this goal is with pseudocapacitive materials that take advantage of reversible surface or near-surface Faradaic reactions to store charge. This allows them to surpass the capacity limitations of electrical double-layer capacitors and the mass transfer limitations of batteries. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00170DOI Listing

Single-Atom Alloy Catalysis.

Chem Rev 2020 Jun 26. Epub 2020 Jun 26.

Single-atom alloys (SAAs) play an increasingly significant role in the field of single-site catalysis and are typically composed of catalytically active elements atomically dispersed in more inert and catalytically selective host metals. SAAs have been shown to catalyze a range of industrially important reactions in electro-, photo-, and thermal catalysis studies. Due to the unique geometry of SAAs, the location of the transition state and the binding site of reaction intermediates are often decoupled, which can enable both facile dissociation of reactants and weak binding of intermediates, two key factors for efficient and selective catalysis. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00078DOI Listing

Encapsulated Metal Nanoparticles for Catalysis.

Chem Rev 2020 Jun 25. Epub 2020 Jun 25.

Department of Chemistry, University of California, Riverside, California 92521, United States.

Metal nanoparticles have drawn great attention in heterogeneous catalysis. One challenge is that they are easily deactivated by migration-coalescence during the catalysis process because of their high surface energy. With the rapid development of nanoscience, encapsulating metal nanoparticles in nanoshells or nanopores becomes one of the most promising strategies to overcome the stability issue of the metal nanoparticles. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00237DOI Listing

Introduction: Reactivity of Nitrogen from the Ground to the Atmosphere.

Chem Rev 2020 Jun;120(12):4919-4920

Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States.

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http://dx.doi.org/10.1021/acs.chemrev.0c00361DOI Listing

Relativistic Heavy-Neighbor-Atom Effects on NMR Shifts: Concepts and Trends Across the Periodic Table.

Chem Rev 2020 Jun 23. Epub 2020 Jun 23.

CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5, CZ-62500 Brno, Czechia.

Chemical shifts present crucial information about an NMR spectrum. They show the influence of the chemical environment on the nuclei being probed. Relativistic effects caused by the presence of an atom of a heavy element in a compound can appreciably, even drastically, alter the NMR shifts of the nearby nuclei. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00785DOI Listing

Selective Carbon-Carbon Bond Cleavage of Cyclopropylamine Derivatives.

Chem Rev 2020 Jun 22. Epub 2020 Jun 22.

School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom.

This review summarizes synthetic developments reported from 1987 to 2019 that exploit C-C single bond cleavage of cyclopropylamine-based systems. The synthetic and mechanistic aspects of key methodologies are highlighted, and examples where aminocyclopropanes are exploited as key intermediates in multistep synthesis are also discussed. The review encompasses cases where aminocyclopropanes participate in polar reactions, pericyclic processes, radical-based reactions, and C-C bond activations. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00166DOI Listing

Coordination-Directed Construction of Molecular Links.

Chem Rev 2020 Jul 19;120(13):6288-6325. Epub 2020 Jun 19.

Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Department of Chemistry, Fudan University, Shanghai 200433, P. R. China.

Since the emergence of the concept of chemical topology, interlocked molecular assemblies have graduated from academic curiosities and poorly defined species to become synthetic realities. Coordination-directed synthesis provides powerful, diverse, and increasingly sophisticated protocols for accessing interlocked molecules. Originally, metal ions were employed solely as templates to gather and position building blocks in entwined or threaded arrangements. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00321DOI Listing

The Role of the Microenvironment in Controlling the Fate of Bioprinted Stem Cells.

Chem Rev 2020 Jun 19. Epub 2020 Jun 19.

Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina 27157, United States.

The field of tissue engineering and regenerative medicine has made numerous advances in recent years in the arena of fabricating multifunctional, three-dimensional (3D) tissue constructs. This can be attributed to novel approaches in the bioprinting of stem cells. There are expansive options in bioprinting technology that have become more refined and specialized over the years, and stem cells address many limitations in cell source, expansion, and development of bioengineered tissue constructs. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00126DOI Listing

Selective Decarbonylation via Transition-Metal-Catalyzed Carbon-Carbon Bond Cleavage.

Chem Rev 2020 Jun 16. Epub 2020 Jun 16.

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China.

Transition-metal-catalyzed decarbonylation via carbon-carbon bond cleavage is an essential synthetic methodology. Given the ubiquity of carbonyl compounds, the selective decarbonylative process offers a distinct synthetic strategy using carbonyl groups as "traceless handles". This reaction has been significantly developed in recent years in many respects, including catalytic system development, mechanistic understanding, substrate scope, and application in the synthesis of complex functional molecules. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00153DOI Listing

Properties and Promise of Catenated Nitrogen Systems As High-Energy-Density Materials.

Chem Rev 2020 Jun 16;120(12):5682-5744. Epub 2020 Jun 16.

Department of Chemistry, Temple University, 1901 N. 13th St. Philadelphia, Pennsylvania 19122, United States.

The properties of catenated nitrogen molecules, molecules containing internal chains of bonded nitrogen atoms, is of fundamental scientific interest in chemical structure and bonding, as nitrogen is uniquely situated in the periodic table to form kinetically stable compounds often with chemically stable N-N bonds but which are thermodynamically unstable in that the formation of stable multiply bonded N is usually thermodynamically preferable. This unique placement in the periodic table makes catenated nitrogen compounds of interest for development of high-energy-density materials, including explosives for defense and construction purposes, as well as propellants for missile propulsion and for space exploration. This review, designed for a chemical audience, describes foundational subjects, methods, and metrics relevant to the energetic materials community and provides an overview of important classes of catenated nitrogen compounds ranging from theoretical investigation of hypothetical molecules to the practical application of real-world energetic materials. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00804DOI Listing

Structural Enzymology of Nitrogenase Enzymes.

Chem Rev 2020 Jun 15;120(12):4969-5004. Epub 2020 Jun 15.

Division of Chemistry and Chemical Engineering, Howard Hughes Medical Institute, California Institute of Technology, Pasadena California 91125, United States.

The reduction of dinitrogen to ammonia by nitrogenase reflects a complex choreography involving two component proteins, MgATP and reductant. At center stage of this process resides the active site cofactor, a complex metallocluster organized around a trigonal prismatic arrangement of iron sites surrounding an interstitial carbon. As a consequence of the choreography, electrons and protons are delivered to the active site for transfer to the bound N. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00067DOI Listing

Ultrafast Photoemission Electron Microscopy: Imaging Plasmons in Space and Time.

Chem Rev 2020 Jul 12;120(13):6247-6287. Epub 2020 Jun 12.

Department of Physics and Astronomy and Pittsburgh Quantum Institute, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States.

Plasmonics is a rapidly growing field spanning research and applications across chemistry, physics, optics, energy harvesting, and medicine. Ultrafast photoemission electron microscopy (PEEM) has demonstrated unprecedented power in the characterization of surface plasmons and other electronic excitations, as it uniquely combines the requisite spatial and temporal resolution, making it ideally suited for 3D space and time coherent imaging of the dynamical plasmonic phenomena on the nanofemto scale. The ability to visualize plasmonic fields evolving at the local speed of light on subwavelength scale with optical phase resolution illuminates old phenomena and opens new directions for growth of plasmonics research. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00146DOI Listing

Global Nitrogen Cycle: Critical Enzymes, Organisms, and Processes for Nitrogen Budgets and Dynamics.

Chem Rev 2020 Jun 12;120(12):5308-5351. Epub 2020 Jun 12.

Department of Geosciences, Princeton University, Princeton, New Jersey 08544, United States.

Nitrogen (N) is used in many of life's fundamental biomolecules, and it is also a participant in environmental redox chemistry. Biogeochemical processes control the amount and form of N available to organisms ("fixed" N). These interacting processes result in N acting as the proximate limiting nutrient in most surface environments. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00613DOI Listing

Big-Data Science in Porous Materials: Materials Genomics and Machine Learning.

Chem Rev 2020 Jun 10. Epub 2020 Jun 10.

Laboratory of Molecular Simulation (LSMO), Institut des Sciences et Ingénierie Chimiques (ISIC), École Polytechnique Fédérale de Lausanne (EPFL), Sion, Switzerland.

By combining metal nodes with organic linkers we can potentially synthesize millions of possible metal-organic frameworks (MOFs). The fact that we have so many materials opens many exciting avenues but also create new challenges. We simply have too many materials to be processed using conventional, brute force, methods. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00004DOI Listing

Permanently Microporous Metal-Organic Polyhedra.

Chem Rev 2020 Jun 10. Epub 2020 Jun 10.

Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States.

As compared to porous network solids, including metal-organic frameworks, covalent-organic frameworks, porous aromatic frameworks, and zeolites, porous molecular materials are relatively unexplored. Additionally, within porous molecular space, porous organic cages (POCs) have been the most widely reported over the past decade. Relatively recently, however, porous hybrid metal-organic molecular complexes have received considerable attention with a large fraction of surface areas for these coordination cages reported over the past three years. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00803DOI Listing

Introduction: Chemical Evolution and the Origins of Life.

Chem Rev 2020 Jun;120(11):4613-4615

School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.

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http://dx.doi.org/10.1021/acs.chemrev.0c00409DOI Listing

Progress and Prospective of Nitrogen-Based Alternative Fuels.

Chem Rev 2020 Jun 5;120(12):5352-5436. Epub 2020 Jun 5.

The Nancy and Stephen Grand Technion Energy Program, Technion - Israel Institute of Technology, Haifa 3200003, Israel.

Alternative fuels are essential to enable the transition to a sustainable and environmentally friendly energy supply. Synthetic fuels derived from renewable energies can act as energy storage media, thus mitigating the effects of fossil fuels on environment and health. Their economic viability, environmental impact, and compatibility with current infrastructure and technologies are fuel and power source specific. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00538DOI Listing

Artificial Metaphotonics Born Naturally in Two Dimensions.

Chem Rev 2020 Jul 4;120(13):6197-6246. Epub 2020 Jun 4.

Department of Materials Science and Engineering, ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), Monash University, Wellington Road, Clayton, Victoria 3800, Australia.

Recently, two rich and exciting research fields, layered two-dimensional (2D) materials and metamaterials, have started overlapping. Metamaterials are artificial, engineered materials with broad metaphotonic prospects such as negative refraction, perfect lensing, subwavelength imaging, and cloaking. The possibility of achieving metaphotonic properties using metamaterials based on layered 2D materials has been extensively exploited. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00592DOI Listing
July 2020
45.661 Impact Factor

Trends in the Usage of Bidentate Phosphines as Ligands in Nickel Catalysis.

Chem Rev 2020 Jul 3;120(13):6124-6196. Epub 2020 Jun 3.

Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States.

A critically important process in catalysis is the formation of an active catalyst from the combination of a metal precursor and a ligand, as the efficacy of this reaction governs the amount of active catalyst. This Review is a comprehensive overview of reactions catalyzed by nickel and an added bidentate phosphine, focusing on the steps transforming the combination of precatalyst and ligand into an active catalyst and the potential effects of this transformation on nickel catalysis. Reactions covered include common cross-coupling reactions, such as Suzuki, Heck, Kumada, and Negishi couplings, addition reactions, cycloadditions, C-H functionalizations, polymerizations, hydrogenations, and reductive couplings, among others. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00682DOI Listing

Catalytic Enantioselective Ring-Opening Reactions of Cyclopropanes.

Chem Rev 2020 May 29. Epub 2020 May 29.

Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO, BCH 4306, 1015 Lausanne, Switzerland.

This review describes the development of enantioselective methods for the ring opening of cyclopropanes. Both approaches based on the reaction of nonchiral cyclopropanes and (dynamic) kinetic resolutions and asymmetric transformations of chiral substrates are presented. The review is organized according to substrate classes, starting by the more mature field of donor-acceptor cyclopropanes. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00109DOI Listing

Visible Light-Driven Radical-Mediated C-C Bond Cleavage/Functionalization in Organic Synthesis.

Chem Rev 2020 May 29. Epub 2020 May 29.

CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China.

Thermal C-C bond cleavage reactions allow the construction of structurally diverse molecular skeletons via predictable and efficient bond reorganizations. Visible light photoredox-catalyzed radical-mediated C-C bond cleavage reactions have recently emerged as a powerful alternative method for overcoming the thermodynamic and kinetic barrier of C-C bond cleavage in diverse molecular scaffolds. In recent years, a plethora of elegant and useful reactions have been invented, and the products are sometimes otherwise inaccessible by classic thermal reactions. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00030DOI Listing

Polymeric Systems for Bioprinting.

Chem Rev 2020 May 29. Epub 2020 May 29.

Department of Bioengineering, Rice University, 6500 South Main Street, Houston, Texas 77030, United States.

Bioprinting is rapidly being adopted as a major method for fabricating tissue engineering constructs. Through the precise deposition of cell- and bioactive molecule-laden materials, bioprinting offers researchers a means to create biological constructs with enhanced spatial complexity that more closely mimics native tissue. The vast majority of materials used in bioprinting have been polymers due to their suitability toward resembling the cellular environment and the variety of methods available to process polymeric systems in ambient or relatively mild chemical and environmental conditions. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00834DOI Listing

Recent Advances and Challenges of Electrocatalytic N Reduction to Ammonia.

Chem Rev 2020 Jun 27;120(12):5437-5516. Epub 2020 May 27.

Department of Chemistry, Michigan State University 578 S Shaw Lane, East Lansing, Michigan 48824, United States.

Global ammonia production reached 175 million metric tons in 2016, 90% of which is produced from high purity N and H gases at high temperatures and pressures via the Haber-Bosch process. Reliance on natural gas for H production results in large energy consumption and CO emissions. Concerns of human-induced climate change are spurring an international scientific effort to explore new approaches to ammonia production and reduce its carbon footprint. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00659DOI Listing

Metal-Sulfur Compounds in N Reduction and Nitrogenase-Related Chemistry.

Chem Rev 2020 Jun 27;120(12):5194-5251. Epub 2020 May 27.

Department of Chemsitry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan.

Transition metal-sulfur (M-S) compounds are an indispensable means for biological systems to convert N into NH (biological N fixation), and these may have emerged by chemical evolution from a prebiotic N fixation system. With a main focus on synthetic species, this article provides a comprehensive review of the chemistry of M-S compounds related to the conversion of N and the structures/functions of the nitrogenase cofactors. Three classes of M-S compounds are highlighted here: multinuclear M-S clusters structurally or functionally relevant to the nitrogenase cofactors, mono- and dinuclear transition metal complexes supported by sulfur-containing ligands in N and NH ( = 2, 4) chemistry, and metal sulfide-based solid materials employed in the reduction of N. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00544DOI Listing

Beyond Ammonia: Nitrogen-Element Bond Forming Reactions with Coordinated Dinitrogen.

Chem Rev 2020 Jun 27;120(12):5637-5681. Epub 2020 May 27.

Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States.

The functionalization of coordinated dinitrogen to form nitrogen-element bonds en route to nitrogen-containing molecules is a long-standing challenge in chemical synthesis. The strong triple bond and the nonpolarity of the N molecule pose thermodynamic and kinetic challenges for promoting reactivity. While heterogeneous, homogeneous, and biological catalysts are all known for catalytic nitrogen fixation to ammonia, the catalytic synthesis of more complicated nitrogen-containing organic molecules has far less precedent. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00705DOI Listing

Antifungal Drug Resistance: Molecular Mechanisms in and Beyond.

Chem Rev 2020 May 22. Epub 2020 May 22.

Department of Molecular Genetics, University of Toronto, 661 University Avenue, Toronto, Ontario M5G 1M1, Canada.

Fungal infections are a major contributor to infectious disease-related deaths across the globe. species are among the most common causes of invasive mycotic disease, with reigning as the leading cause of invasive candidiasis. Given that fungi are eukaryotes like their human host, the number of unique molecular targets that can be exploited for antifungal development remains limited. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00199DOI Listing

Functional Supramolecular Polymeric Networks: The Marriage of Covalent Polymers and Macrocycle-Based Host-Guest Interactions.

Chem Rev 2020 Jul 19;120(13):6070-6123. Epub 2020 May 19.

State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China.

Covalent polymers connected by non-covalent interactions constitute a fascinating set of materials known as supramolecular polymer networks (SPNs). A key feature of SPNs is that the underlying covalent polymers endow the resulting self-assembled materials with features, such as structural and mechanical integrity, good processability, recyclability, stimuli-responsiveness, self-healing, and shape memory, that are not recapitulated in the case of classic covalent polymer systems. The unique nature of SPNs derives from the controlled marriage of traditional covalent polymers and macrocycle-based host-guest interactions. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00839DOI Listing

Prebiotic Syntheses of Noncanonical Nucleosides and Nucleotides.

Chem Rev 2020 Jun 18;120(11):4806-4830. Epub 2020 May 18.

School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0440, United States.

The origin of nucleotides is a major question in origins-of-life research. Given the central importance of RNA in biology and the influential RNA World hypothesis, a great deal of this research has focused on finding possible prebiotic syntheses of the four canonical nucleotides of coding RNA. However, the use of nucleotides in other roles across the tree of life might be evidence that nucleotides have been used in noncoding roles for even longer than RNA has been used as a genetic polymer. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00069DOI Listing

Water and Metal-Organic Frameworks: From Interaction toward Utilization.

Chem Rev 2020 May 15. Epub 2020 May 15.

Catalysis Engineering, Chemical Engineering Department, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands.

The steep stepwise uptake of water vapor and easy release at low relative pressures and moderate temperatures together with high working capacities make metal-organic frameworks (MOFs) attractive, promising materials for energy efficient applications in adsorption devices for humidity control (evaporation and condensation processes) and heat reallocation (heating and cooling) by utilizing water as benign sorptive and low-grade renewable or waste heat. Emerging MOF-based process applications covered are desiccation, heat pumps/chillers, water harvesting, air conditioning, and desalination. Governing parameters of the intrinsic sorption properties and stability under humid conditions and cyclic operation are identified. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00746DOI Listing

Bioprinting: From Tissue and Organ Development to Models.

Chem Rev 2020 May 14. Epub 2020 May 14.

Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6211 LK Maastricht, The Netherlands.

Bioprinting techniques have been flourishing in the field of biofabrication with pronounced and exponential developments in the past years. Novel biomaterial inks used for the formation of bioinks have been developed, allowing the manufacturing of models and implants tested preclinically with a certain degree of success. Furthermore, incredible advances in cell biology, namely, in pluripotent stem cells, have also contributed to the latest milestones where more relevant tissues or organ-like constructs with a certain degree of functionality can already be obtained. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00789DOI Listing
May 2020
45.661 Impact Factor

Proton Transport in Metal-Organic Frameworks.

Chem Rev 2020 May 14. Epub 2020 May 14.

Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.

Solid-state proton conductors (SSPCs), which are a key component for the safety and efficiency of fuel cells, have received much attention due to their broad application in electrochemical devices. In particular, the development of new materials with high conducting performance and an understanding of the conduction mechanism have become critical issues in this field. Porous metal-organic frameworks (MOFs) or porous coordination polymers (PCPs) have recently emerged and have been extensively studied as a new type of proton conductor due to their crystallinity, designability, and high porosity. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00842DOI Listing

Carbon-Carbon Bond Cleavage at Allylic Positions: Retro-allylation and Deallylation.

Chem Rev 2020 May 12. Epub 2020 May 12.

Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.

The development of C-C bond-cleaving transformations is an issue in modern organic chemistry that is as challenging as it is important. Among these transformations, the retro-allylation and deallylation of allylic compounds are uniquely intriguing methods for the cleavage of C-C σ bonds at the allylic position. Retro-allylation is regarded as a prospective method for the generation of highly valuable regio- and stereodefined allylic metal compounds. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00157DOI Listing

Root of the Tree: The Significance, Evolution, and Origins of the Ribosome.

Chem Rev 2020 Jun 6;120(11):4848-4878. Epub 2020 May 6.

Center for the Origins of Life, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.

The ribosome is an ancient molecular fossil that provides a telescope to the origins of life. Made from RNA and protein, the ribosome translates mRNA to coded protein in all living systems. Universality, economy, centrality and antiquity are ingrained in translation. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00742DOI Listing

Activation of Dinitrogen by Polynuclear Metal Complexes.

Chem Rev 2020 Jun 4;120(12):5517-5581. Epub 2020 May 4.

Center for Catalysis, and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States.

Activation of dinitrogen plays an important role in daily anthropogenic life, and the processes by which this fixation occurs have been a longstanding and significant research focus within the community. One of the major fields of dinitrogen activation research is the use of multimetallic compounds to reduce and/or activate N into a more useful nitrogen-atom source, such as ammonia. Here we report a comprehensive review of multimetallic-dinitrogen complexes and their utility toward N activation, beginning with the -block metals from Group 4 to Group 11, then extending to Group 13 (which is exclusively populated by B complexes), and finally the rare-earth and actinide species. Read More

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http://dx.doi.org/10.1021/acs.chemrev.0c00042DOI Listing

Combining Chemometrics and Sensors: Toward New Applications in Monitoring and Environmental Analysis.

Chem Rev 2020 Jul 4;120(13):6048-6069. Epub 2020 May 4.

The University of Queensland, Brisbane 4072, Queensland.

For many years, an extensive array of chemometric methods have provided a platform upon which a quantitative description of environmental conditions can be obtained. Applying chemometric methods to environmental data allows us to identify and describe the interrelations between certain environmental drivers. They also provide an insight into the interrelationships between these drivers and afford us a greater understanding of the potential impact that these drivers can place upon the environment. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00616DOI Listing

Chemical and Thermal Sintering of Supported Metals with Emphasis on Cobalt Catalysts During Fischer-Tropsch Synthesis.

Chem Rev 2020 May 4;120(10):4455-4533. Epub 2020 May 4.

Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States.

This comprehensive critical review combines, for the first time, recent advances in nanoscale surface chemistry, surface science, DFT, adsorption calorimetry, and in situ XRD and TEM to provide new insights into catalyst sintering. This work provides qualitative and quantitative estimates of the extent and rate of sintering as functions of nanocrystal (NC) size, temperature, and atmosphere. This review is unique in that besides summarizing important, useful data from previous studies, it also advances the field through addition of (i) improved or new models, (ii) new data summarized in original tables and figures, and (iii) new fundamental perspectives into sintering of supported metals and particularly of chemical sintering of supported Co during Fischer-Tropsch synthesis. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00417DOI Listing

The Staudinger Ligation.

Chem Rev 2020 May 1;120(10):4301-4354. Epub 2020 May 1.

Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany.

While the Staudinger reaction has first been described a hundred years ago in 1919, the ligation reaction became one of the most important and efficient bioconjugation techniques in the 1990s and this century. It holds the crucial characteristics for bioorthogonal chemistry: biocompatibility, selectivity, and a rapid and high-yielding turnover for a wide variety of applications. In the past years, it has been used especially in chemical biology for peptide/protein synthesis, posttranslational modifications, and DNA labeling. Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00665DOI Listing

Metal-Organic Framework-Based Catalysts with Single Metal Sites.

Chem Rev 2020 May 1. Epub 2020 May 1.

AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Sakyo-ku, Kyoto 606-8501, Japan.

Metal-organic frameworks (MOFs) are a class of distinctive porous crystalline materials constructed by metal ions/clusters and organic linkers. Owing to their structural diversity, functional adjustability, and high surface area, different types of MOF-based single metal sites are well exploited, including coordinately unsaturated metal sites from metal nodes and metallolinkers, as well as active metal species immobilized to MOFs. Furthermore, controllable thermal transformation of MOFs can upgrade them to nanomaterials functionalized with active single-atom catalysts (SACs). Read More

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http://dx.doi.org/10.1021/acs.chemrev.9b00757DOI Listing
May 2020
45.661 Impact Factor