39,644 results match your criteria Chemical Communications [Journal]


Inorganic salt transition states: a stable and highly stretchable elastomer-like phase (ELP) of phosphate salts at the air-solid interface.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Shaanxi Key Laboratory of Degradable Biomedical Materials, School of Chemical Engineering, Northwest University, Xi'an, 710069, China.

An elastomer-like phase (ELP) of phosphate salts with ultra-high stability was successfully prepared at the air-solid interface. ELPs possess multilayered structures, and exhibit high elasticity, and strong self-healing abilities. These unique properties of ELPs greatly expand our understanding of inorganic salts and reveal their potential application in future material fields. Read More

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Electrochemical methoxymethylation of alcohols - a new, green and safe approach for the preparation of MOM ethers and other acetals.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, ME4 4TB, UK.

A new, green, safe, cost-effective and highly efficient electrochemical approach for the methoxymethylation of alcohols and phenols was successfully developed. The methodology was also applied to the synthesis of substituted acetals. Read More

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1,2,4-Triazolium ions as flexible scaffolds for the construction of polyphilic ionic liquid crystals.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Università degli Studi di Palermo, Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Via delle Scienze Edificio 17, Palermo, 90128, Italy.

A novel scaffold for the construction of self-organised ionic liquids and ionic liquid crystals bearing both perfluorocarbon and hydrocarbon moieties has been developed. The phase behaviour and physical properties of these materials can be tuned as a function of chain length and fluorine content and significant structural elaboration is possible, giving a highly flexible system. Read More

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Metal coordination induced ring contraction of porphyrin derivatives.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar - 751005, India. and Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400 094, India.

A remarkable rearrangement of a diferrocenylporphyrin to give a silver(iii) corrole has been discovered. Compared to the previously reported porphyrin to corrole ring conversions (extremely rare and poor reaction yields), our methodology delivers near quantitative yield for this ring contraction. Read More

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ESIPT-based ratiometric fluorescence probe for the intracellular imaging of peroxynitrite.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Department of Chemistry, University of Bath, Bath, BA2 7AY, UK. and Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan.

In this work, we set out to develop an endoplasmic reticulum (ER) directed ESIPT-based ONOO- ratiometric fluorescent probe (ABAH-LW). ABAH-LW was synthesized in four steps and found to have a high sensitivity and selectivity towards the detection of ONOO-. ABAH-LW was able to detect low concentrations of ONOO- (limit of detection = 21. Read More

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August 2018
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Pyridine-based low-temperature synthesis of CoN, NiN and CuN nanoparticles.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany.

CoN, Ni3N and Cu3N nanoparticles were obtained by pyridine-based synthesis using CoI2, NiI2, and CuI as the starting materials as well as NH3/KNH2 as the base and nitride source. Colloidally stable suspensions of crystalline, small-sized CoN (4.5 ± 0. Read More

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Highly selective room temperature acetylene sorption by an unusual triacetylenic phosphine MOF.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Department of Chemistry, The University of Texas at Austin, 100 East 24th Street, Stop A1590, Austin, Texas 78712, USA.

The new ligand tris(p-carboxyphenylethynyl)phosphine (P{C[triple bond, length as m-dash]CC6H4-4-CO2H}3) was used to synthesize a permanently porous Mn(ii)-based acetylenic phosphine coordination material, PCM-48. This triply-interpenetrated MOF contains 1-D microchannels that are decorated with electron-rich and adsorbate-accessible acetylenic moieties and phosphine lone pairs. PCM-48 has a moderate room-temperature C2H2 adsorption capacity (25. Read More

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Observing phase transformation in CVD-grown MoSvia atomic resolution TEM.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan. and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan and Center for Emergent Functional Matter Science, National Chiao Tung University, Hsinchu 30010, Taiwan.

We utilized in situ transmission electron microscopy to observe phase transformation in CVD-grown MoS2. Significantly, the reaction was performed under electron irradiation through appropriate control of the electron dose and exposure time. Moreover, we proposed a new route between the 2H and 1T phases that involved the higher energy states TS1/TS2. Read More

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Molecularly endowed hydrogel with an in silico-assisted screened peptide for highly sensitive small molecule harvesting.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia (IIT), Largo Barsanti e Matteucci 53, Naples 80125, Italy and Interdisciplinary Research Centre on Biomaterials (CRIB), University "Federico II", Piazzale Tecchio 80, Naples 80125, Italy and Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale (DICMAPI), University "Federico II", Piazzale Tecchio 80, Naples 80125, Italy.

We present a novel method for the detection of small molecules in complex fluids based on the selection of a specific peptide for target capture and its integration into an antifouling polymeric network. Such an approach can represent a universal platform for the direct and ultra-sensitive detection of small molecules in complex media. Read More

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Triphenylamine derived titanium oxo clusters: an approach to effective organic-inorganic hybrid dyes for photoactive electrodes.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China.

Titanium oxo clusters (TOCs) anchored with photoactive triphenylamine (TPA) dyes are reported for the first time. The TiO2 electrodes modified with the TPA dye pre-anchored TOCs showed excellent photocurrent response properties. Read More

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A photocatalytic iminyl radical-mediated C-C bond cleavage/addition/cyclization cascade for the synthesis of 1,2,3,4-tetrahydrophenanthrenes.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China. and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, China.

On the basis of the strategy of iminyl radical-mediated C-C bond cleavage, a visible light photocatalytic radical addition/cyclization cascade is described, providing an efficient and regioselective access to cyanoalkylated 1,2,3,4-tetrahydrophenanthrenes. Read More

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Glucose oxidase mediated targeted cancer-starving therapy by biotinylated self-assembled vesicles.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Department of Biological Chemistry, Indian Association for the Cultivation of Science, Kolkata - 700 032, India.

Herein, we demonstrate glucose oxidase (GOx) mediated targeted cancer-starving therapy by self-assembled vesicle of trimesic acid based biotinylated amphiphile (TMB). The TMB vesicles entrapped GOx and selectively killed cancer cells (HeLa, B16F10), with ∼6-fold higher efficiency compared to non-cancer cells (CHO, NIH3T3), by blocking the energy supply to tumors through the oxidation of intracellular glucose. Read More

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Diversity-oriented synthesis of chromenopyrrolidines from azomethine ylides and 2-hydroxybenzylidene indandiones via base-controlled regiodivergent (3+2) cycloaddition.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan, Republic of China.

An organobase-directed, regiodivergent 1,3-dipolar cycloaddition of azomethine ylides and 2-hydoxybenzylidene indandiones is reported. The scarcely explored reversal of the nucleophilic site in azomethine ylides has been exploited for their regiodivergent (3+2) cycloaddition, which subsequently resulted in two different cascade processes to generate functionally distinct chromenopyrrolidines in a diversity oriented manner. Read More

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Unexpected high binding energy of CO on CHNHPbI lead-halide organic-inorganic perovskites via bicarbonate formation.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Department of Chemistry and Biochemistry, North Dakota State University (NDSU), Fargo, ND 58108, USA.

The adsorption kinetics of CO2 was experimentally characterized in ultra-high vacuum (UHV). Unexpectedly, high desorption temperatures (640 K, 170 kJ mol-1) were seen. Density functional theory (DFT) calculations suggest the stabilization mechanism: bicarbonate formation in the defected perovskite film due to CO2 and H2O coadsorption. Read More

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Styrylsilane coupling reagents for immobilization of organic functional groups on silica and glass surfaces.

Chem Commun (Camb) 2018 Aug 17. Epub 2018 Aug 17.

Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea.

Styrylsilanes serve as new coupling reagents for introducing organic functional groups on silica and glass surfaces. Functionalized styrylsilanes, which are readily prepared via catalytic hydrosilylation of the corresponding phenylacetylenes with silanes, are immobilized on silica through acid catalyzed processes under mild conditions. Read More

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Two-component supramolecular metallogels with the presence of Pt-Pt metal-metal interactions.

Chem Commun (Camb) 2018 Aug 16. Epub 2018 Aug 16.

CAS Key Laboratory of Soft Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.

Two-component supramolecular metallogels have been successfully constructed with the involvement of heteromeric Pt(ii)Pt(ii) metal-metal interactions, which display low-energy emissions in the near-infrared region. We demonstrate and rationalize how the gel stability can be increased by modulating the gelation solvent as well as the crosslinking unit. Read More

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Integrating molecular probes and molecular dynamics to reveal binding modes of GLUT5 activatory and inhibitory ligands.

Chem Commun (Camb) 2018 Aug 16. Epub 2018 Aug 16.

Department of Chemistry, Michigan Technological University, Houghton, Michigan 49931, USA.

Fructose transporter GLUT5 is characterized by unusual substrate specificity and is linked to a variety of metabolic disorders. A series of high-affinity GLUT5-specific sugar-based probes - ManCous - have been very recently described and efficiently used as reporters of GLUT5 activity in cells. Here we present several 1 microsecond molecular dynamics (MD) simulations of GLUT5 and its complexes with fructose and two different ManCou probes, in a solvated cell membrane environment. Read More

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Precise surface structure of nanofibres with nearly atomic-level precision.

Chem Commun (Camb) 2018 Aug 16. Epub 2018 Aug 16.

The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, 2005 Songhu Road, Shanghai 200438, P. R. China.

We report the first example of endowing the surface structure of a polymeric assembly with nearly atomic-level precision. The solenoidal wrapping of a DNA chain around the surface of a nanofibre transcribes the precise sequence structure of the DNA onto the nanofibre surface, resulting in a precise surface structure. Read More

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Unexpected behaviour in derivatives of Barluenga's reagent, Hal(Coll)X (Coll = 2,4,6-trimethyl pyridine, collidine; Hal = I, Br; X = PF, ClO & BF).

Chem Commun (Camb) 2018 Aug 16. Epub 2018 Aug 16.

Chemical Crystallography, Chemistry Research Laboratory, Mansfield Road, Oxford, UK.

For the collidine analogues of Barluenga's Reagent (IPy2BF4) reported, a flat cation is necessary for the generation of a modulated phase, in keeping with the "Ratchet Model" theory [Kim et al., Crystal Growth & Design, 2014, 14, 6294]. Attempts to study "diffuse modulation" in Br(Coll)2ClO4 have shown that these non-Bragg features disappear very rapidly on exposure to synchrotron radiation, an effect thought to be caused by the radiation damage disrupting the lattice vibrations that cause the modulation. Read More

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A pH-responsive nanoprobe for turn-on F-magnetic resonance imaging.

Chem Commun (Camb) 2018 Aug 16. Epub 2018 Aug 16.

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

We successfully fabricated 19F magnetic resonance imaging (MRI) nanoprobes by partly replacing the 2-methylimidazolate of the metal organic framework (MOF) matrix ZIF-8, of which the strong 19F MRI signal displays an interesting pH dependence property, indicating its great potential as a 19F MRI contrast agent for stimuli-responsive imaging with high penetration depth and low background. Read More

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Elucidation of the inverse trans influence in uranyl and its imido and carbene analogues via quantum chemical simulation.

Chem Commun (Camb) 2018 Aug 16. Epub 2018 Aug 16.

Department of Chemistry, Lancaster University, Bailrigg, Lancaster, LA1 4YB, UK.

The inverse trans influence (ITI) is investigated in uranyl, UO22+, and its isoelectronic imido (U(NH)22+) and carbene (U(CH2)22+) analogues at the density functional and complete active space self consistent field levels of theory. The quantum theory of atoms in molecules is employed to quantify, for the first time, the effect of the ITI on covalent bond character and its relationship to bond lengths and complex stability. Read More

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Efficient and regioselective synthesis of γ-lactone glycosides through a novel debenzylative cyclization reaction.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

University of Namur, Département de Chimie, Laboratoire de Chimie Bio-Organique, Rue de Bruxelles 61, B-5000 Namur, Belgium.

An efficient and regioselective approach for the construction of synthetically important γ-lactone glycosides is reported from unprotected aldoses through a new debenzylative lactonization (DBL) reaction. The scope and limitations of this DBL reaction are described starting from a series of commercially available hexoses (l-fucose, d-galactose, d-glucose) and pentoses (d-arabinose, d-ribose, d-lyxose, d-xylose) to afford the corresponding γ-lactones in good yields and without concomitant δ-lactone formation. Read More

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August 2018
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Enzyme-triggered self-assembly of gold nanoparticles for enhanced retention effects and photothermal therapy of prostate cancer.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Department of Radiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China.

A peptide-modified gold nanoparticle was developed for tumour-targeted therapy. Triggered by alkaline phosphatase, the CREKA-YPFFK(Nph) peptide can self-assemble and further result in accumulation of gold nanoparticles in tumour cells. The large-sized gold nanoparticle aggregates cannot escape from the tumour tissue, therefore realizing the goal of tumour-specific targeting, enhanced retention and photothermal effects. Read More

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Chiral Lewis acid-catalyzed enantioselective cyclopropanation and C-H insertion reactions of vinyl ketones with α-diazoesters.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.

Enantioselective cyclopropanation and C-H insertion reactions of α-substituted vinyl ketones with α-diazoesters have been accomplished using a N,N'-dioxide-scandium(iii) complex catalyst. Various tetrasubstituted cyclopropanes and E-enone derivatives bearing a chiral ester substituent were obtained simultaneously with good yields and excellent enantioselectivities. Read More

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Photochemical activation of SF by N-heterocyclic carbenes to provide a deoxyfluorinating reagent.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.

The activation of the greenhouse gas SF6 using electron-rich N-heterocyclic carbenes gave 2,2-difluoroimidazolines or 2,2-difluoroimidazolidines as well as 2-thio derivatives of the carbene precursors. The N-heterocyclic carbenes can also convert SF4 to give similar products. The difluoroimidazolidine derivatives were applied in deoxyfluorination reactions. Read More

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Integrated production of bio-jet fuel containing lignin-derived arenes via lipid deoxygenation.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China.

We report an integrated production of bio-jet fuel, from dehydrogenation of lignin-derived cycloalkanes and deoxygenation of lipid over PtIr/γ-Al2O3 at 400 °C in the absence of hydrogen. The CO generated in situ via lipid decarbonylation is strongly adsorbed by Ir and subsequently undergoes methanation, with the remaining Pt sites catalyzing cycloalkane dehydrogenation. Read More

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The influence of ortho-methyl substitution in organometallic self-assembly - a comparative study on Cu(111) vs. Ag(111).

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Deutsches Museum, Museumsinsel 1, 80538 Munich, Germany. and Department of Physics, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany.

Metal surface-induced dehalogenation of precursors is known to initiate self-assembly of organometallic networks, where tectons are connected via carbon-metal-carbon (C-M-C) bonds. Even though reversibility of the C-M-C bonds facilitates structural equilibration, defects associated with highly bent organometallic linkages are still commonly observed. By introducing a steric hindrance to reduce the C-M-C bond angle flexibility, we find well ordered organometallic networks of an ortho-methyl substituted 1,3,5-tris(p-bromophenyl)benzene analogue on Cu(111) after room-temperature (RT) deposition and on Ag(111) after annealing. Read More

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Trends in the valence band electronic structures of mixed uranium oxides.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Belgian Nuclear Research Centre (SCK·CEN), Institute for Nuclear Materials Science, Boeretang 200, B-2400 Mol, Belgium.

The valence band electronic structures of mixed uranium oxides (UO2, U4O9, U3O7, U3O8, and β-UO3) have been studied using the resonant inelastic X-ray scattering (RIXS) technique at the U M5 edge and computational methods. We show here that the RIXS technique and recorded U 5f-O 2p charge transfer excitations can be used to test the validity of theoretical approximations. Read More

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A supramolecular hybrid material constructed from pillar[6]arene-based host-guest complexation and ZIF-8 for targeted drug delivery.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, P. R. China.

A novel supramolecular hybrid material ZIF-8@DOX@WP6@G constructed from the host-guest complexation between carboxylated pillar[6]arene (WP6) and a galactose derivative (G), and doxorubicin (DOX)-loaded ZIF-8 has been synthesized for targeted drug delivery. The results showed that ZIF-8@DOX@WP6@G not only maintained the pH-sensitive drug release properties of ZIF-8 but also exhibited excellent water dispersibility and selective toxicity for hepatoma cancer cells due to the assembly of WP6 and G. The strategy used in this study opens up a new avenue for constructing multifunctional supramolecular hybrid materials for therapeutic applications in cancer treatment. Read More

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Design and synthesis of tailored human caseinolytic protease P inhibitors.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Center for Integrated Protein Science Munich, Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany.

Human caseinolytic protease P (hClpP) is important for degradation of misfolded proteins in the mitochondrial unfolded protein response. We here introduce tailored hClpP inhibitors that utilize a steric discrimination in their core naphthofuran scaffold to selectively address the human enzyme. This novel inhibitor generation exhibited superior activity compared to previously introduced beta-lactones, optimized for bacterial ClpP. Read More

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Thermal-exfoliated synthesis of N-rich carbon-based nanosheets from layered bulk crystals of a metal-hexamine framework.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.

We develop a general strategy for the design of a series of 2D N-rich carbon-based nanomaterials through the thermal exfoliation of layered metal-hexamine framework microcrystals. By a facile pyrolysis, the sharply generated gases escape from the layered precursors, leading to the exfoliation of the layers and successful preparation of 2D carbon-based nanomaterials. This strategy can readily skip the complicated morphology engineering process of 2D metal-organic frameworks to produce 2D N-rich carbon-based nanomaterials on a large scale. Read More

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August 2018
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Evolving mechanism of organotemplate-free hierarchical FAU zeolites with house-of-card-like structures.

Chem Commun (Camb) 2018 Aug 15. Epub 2018 Aug 15.

Shenzhen Key Laboratory of Special Functional Materials & Shenzhen Engineering Laboratory for Advance Technology of Ceramics, College of Materials Science and Engineering, Shenzhen University, Shenzen 518060, P. R. China. and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P. R. China and JANUS (Dongguan) Precision Components Co., Ltd, P. R. China.

Hierarchical FAU zeolites with house-of-card-like (HCL) structures were synthesized through a one-pot organotemplate-free route in the Na2O-Al2O3-SiO2-H2O system. The structure details and formation mechanism of HCL zeolites were determined by the combination of electron crystallography and synthesis chemistry. The results revealed that the unique HCL morphology was attributed to large solution viscosity, and the evolution process obeyed a skeleton crystal growth model due to the limited vortexing effect, which was different from those of the HCL zeolites obtained using organic templates. Read More

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Engineering a cleavable disulfide bond into a natural product siderophore using precursor-directed biosynthesis.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

The University of Sydney, School of Medical Sciences (Pharmacology) and Bosch Institute, Camperdown, New South Wales 2006, Australia.

An analogue of the bacterial siderophore desferrioxamine B (DFOB) containing a disulfide motif in the backbone was produced from Streptomyces pilosus cultures supplemented with cystamine. Cystamine competed against native 1,5-diaminopentane during assembly. DFOB-(SS)1[001] and its complexes with Fe(iii) or Ga(iii) were cleaved upon incubation with dithiothreitol. Read More

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Li dopant induces moisture sensitive phase degradation of an all-inorganic CsPbIBr perovskite.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, China.

All-inorganic halide perovskites without volatile components have great potential for long term thermal stability. However, the phase stability of all-inorganic perovskites is sensitive to moisture and has been seldom studied. In this work, the phase stability of α-CsPbI2Br was studied in different relative humidity conditions. Read More

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Amorphous titanic acid electrode: its electrochemical storage of ammonium in a new water-in-salt electrolyte.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, USA.

We report an amorphous titanic acid of TiO1.85(OH)0.30·0. Read More

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Turning off Bacillus cereus quorum sensing system with peptidic analogs.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Institute of Biochemistry, Food Science and Nutrition, The Hebrew University of Jerusalem, Rehovot, 76100, Israel.

We explored quenching of the PlcR-PapR quorum-sensing system in Bacillus cereus. We generated PapR7-peptidic derivatives that inhibit this system and thus the production of virulence factors, reflected by a loss in hemolytic activity, without affecting bacterial growth. To our knowledge, these peptides represent the first potent synthetic inhibitors of quorum-sensing in B. Read More

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Triple-shelled NiMnO hollow spheres as an efficient catalyst for low-temperature selective catalytic reduction of NO with NH.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian, 116024, China.

Unique triple-shelled NiMn2O4 hollow spheres are fabricated by a facile solvothermal method. Owing to its particular triple shell structure, the as prepared NiMn2O4 catalyst exhibits superior low-temperature NH3-SCR catalytic performance, achieving above 90% NOx conversion in the temperature range from 100 °C to 225 °C. Read More

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ExciTides: NTP-derived probes for monitoring pyrophosphatase activity based on excimer-to-monomer transitions.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Division of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland.

We describe a new type of nucleotide-derived fluorescent probe designed for monitoring pyrophosphatase activity based on excimer-to-monomer transitions, called ExciTide. The nucleotides were designed with two self-interacting dye moieties and synthesised using copper-catalysed azide-alkyne cycloaddition click chemistry. We applied these probes for enzyme activity monitoring and inhibitor evaluation. Read More

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Distinguishing between two- and three-bond correlations for all C multiplicities in heteronuclear NMR spectroscopy.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Copenhagen, Denmark.

A novel two-dimensional method, SEA XLOC, for distinguishing between two- and three-bond correlations in heteronuclear NMR spectroscopy is introduced and demonstrated on ibuprofen and by a complete set of correlations with a simple and most complex quaternary 13C multiplet in strychnine. Read More

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A recyclable hydroxyl functionalized polyindole hydrogel for sodium hydroxide extraction via the synergistic effect of cation-π interactions and hydrogen bonding.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

State Key Laboratory of Environment-friendly Energy Materials, National Engineering Technology Center for Insulation Materials, School of Material Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, P. R. China. and Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

We have successfully constructed a new type of recyclable indole-based hydrogel, which exhibited highly effective extraction behavior for hydroxide via the synergistic effect of cation-π interactions and hydrogen bonds. More interestingly, the absorption performance could be visually detected by taking advantage of the color altering effect of the host-guest interactions. Read More

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A semiconductor and fluorescence dual-mode room-temperature ammonia sensor achieved by decorating hydroquinone into a metal-organic framework.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710062, China.

Presented herein is a magnesium-organic framework (SNNU-88) incorporated with active hydroquinone groups, which exhibits not only remarkable semiconductor sensing for traces of ammonia vapor (5-100 ppm), but also extra-high fluorescence response to liquid NH3·H2O through an unusual turn-off (0-1.5 ppm) and turn-on (3.0-100 ppm) luminescence sensing mechanism at room temperature. Read More

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De novo design of small molecule acceptors via fullerene/non-fullerene hybrids for polymer solar cells.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072, China. and Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.

Two fullerene/non-fullerene hybrids were designed and synthesized for polymer solar cells as small molecule acceptors. Polymer solar cells based on J71:A2 achieved a power conversion efficiency of 4.52% with the open circuit voltage at nearly 1. Read More

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August 2018
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Arsagermene, a compound with an -As[double bond, length as m-dash]Ge[double bond splayed right] double bond.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8571, Ibaraki, Japan.

The first compound featuring an As[double bond, length as m-dash]Ge double bond, arsagermene Mes*As[double bond, length as m-dash]Ge(SiMetBu2)2, was synthesized, isolated and fully characterized. Crystallographic studies revealed that arsagermene has a planar Ge[double bond, length as m-dash]As bond of 2.2731(8) Å, which is notably shorter than the standard Ge-As single bond. Read More

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On the exfoliation and anisotropic thermal expansion of black phosphorus.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Dipartimento di Chimica and NIS Centre, Università di Torino, via Giuria 5, I-10125 Torino, Italy.

Black phosphorus is a bulk solid allotrope of elemental phosphorus and can be seen as an infinite stack of phosphorene sheets. It is interesting from a technological point of view as well as from an electronic structure perspective due to the importance of electron correlation effects. In a recent paper [M. Read More

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Visible-light promoted fluoroalkylselenolation: toward the reactivity of unsaturated compounds.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Institute of Chemistry and Biochemistry (ICBMS - UMR CNRS 5246), Unvi. Lyon, Université Lyon 1, CNRS, 43 Bd du 11 novembre 1918, F-69622 Villeurbanne, France.

The reactivity of fluoroalkylselenotoluenesulfonates with unsaturated substrates is explored herein. The direct activation of these shelf-stable reagents under visible light allows the double functionalisation of alkenes or alkynes efficiently, leading to a wide range of β-fluoroalkylselenolated sulfones. Mechanistic investigations have been undertaken supporting the formation of radical intermediates. Read More

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Silicoaluminophosphate-11 (SAPO-11) molecular sieves synthesized via a grinding synthesis method.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

State Key Laboratory for Heavy Oil Processing, Key Laboratory of Catalysis, CNPC, China University of Petroleum, Qingdao, 266580, China. and College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China.

Aluminophosphate molecular sieves with an AEL-type structure and various framework compositions were prepared via a grinding synthesis method (GSM). The rapid crystal growth rate was due to the enhanced interactions between the templates and aluminum species and abundant low-polymerized phosphorus species. The amount of template and water used was substantially reduced, which has a great economic and environment impact for large-scale synthesis. Read More

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Supramolecular nanopatterns of H-shaped molecules.

Chem Commun (Camb) 2018 Aug 14. Epub 2018 Aug 14.

Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.

Alkoxy-substituted phenylene-ethynylene-butadiynylenes (PEBs) are connected via 1H-benzimidazole units to form H-shaped molecular scaffolds that self-assemble on graphite at the solid/liquid interface. Spacer lengths and end groups determine supramolecular tiling patterns, as shown via scanning tunneling microscopy (STM). Read More

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Branch-PCR constructed TP53 gene nanovector for potential cancer therapy.

Chem Commun (Camb) 2018 Aug 13. Epub 2018 Aug 13.

State Key Laboratory of Elemento-Organic Chemistry and Department of Chemical Biology, National Pesticide Engineering Research Center (Tianjin), Collaborative Innovation Center of Chemical Science and Engineering, (Tianjin), College of Chemistry, Nankai University, Tianjin, 300071, China.

A novel and efficient branch PCR strategy has been used to construct a TP53 gene nanovector based on a pair of trimers as primers, which showed unique advantages compared to other existing systems for gene delivery and effective potential cancer therapy. Read More

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Design and synthesis of galactose-conjugated fluorinated and non-fluorinated proline oligomers: towards antifreeze molecules.

Chem Commun (Camb) 2018 Aug 13. Epub 2018 Aug 13.

Department of Life Science and Applied Chemistry, Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan. and Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, 688 Yingbin Avenue, Jinhua 321004, China.

Galactose-conjugated fluorinated and non-fluorinated proline oligomers that exhibit an α-helical structure with hydrophilic and lipophilic parts were designed as potential antifreeze molecules. These galactose-proline oligomers were synthesized and their physical properties were evaluated. Interestingly, the non-fluorinated galactose-proline oligomers showed in contrast to the fluorinated analogues weak antifreeze activity. Read More

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Synthesis of new fluorinated proline analogues from polyfluoroalkyl β-ketoacetals and ethyl isocyanoacetate.

Chem Commun (Camb) 2018 Aug 13. Epub 2018 Aug 13.

Organisch-Chemisches Institut, Universität Münster, Corrensstraße 40, Münster 48149, Germany. and Cells-in-Motion Cluster of Excellence, Universität Münster, Waldeyerstraße 15, 48149 Münster, Germany.

The reaction of trifluoroaldol acetal and other polyfluoroalkyl β-ketoacetals with ethyl isocyanoacetate was applied for the preparation of hitherto unknown fluorinated amino acids, cis- and trans-3-CF3/C2F5-prolines as well as trans-3-CF2Br/CF2Cl/CHF2-3-hydroxyprolines. Read More

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