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Steroids 2022 May 14:109042. Epub 2022 May 14.

N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Academician Lavrent'ev Ave. 9, 630090 Novosibirsk, Russian Federation. Electronic address:

Semisynthetic triterpene betulonic acid is of significant interest due to its biological activity and synthetic application. In this study, we report the synthesis of hybrid compounds, containing betulonic acid carboxamide and arylpyrimidine fragments. A total of 15 conjugates were prepared using the cyclocondensation reaction of new terpenoid alkynyl ketones with amidinium salts. Read More

J Hazard Mater 2022 May 4;436:129080. Epub 2022 May 4.

Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China. Electronic address:

Mercury (Hg) pollution can negatively impact ecosystems, and there is a need for simple Hg monitoring platforms. Here, a dual-ligand fluorescence probe based on terbium-organic gels (Tb-LP MOGs) was constructed for efficient Hg detection. Tb-LP MOGs were developed through a facile room-temperature gelation method, showing two emission peaks derived from luminol and Tb at 424 nm and 544 nm, respectively. Read More

Acc Chem Res 2022 May 17. Epub 2022 May 17.

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road, West Fuzhou 350002, P.R. China.

ConspectusFor the last two decades, materials scientists have contributed to a growing library of porous crystalline materials. These synthetic materials are typically extended networks, including metal-organic frameworks (MOFs) and covalent organic frameworks (COFs), or discrete materials like metal-organic cages (MOCs) and porous organic cages (POCs). Advanced porous materials have shown promise for various applications due to their modular nature and structural tunability. Read More

Nat Nanotechnol 2022 May 16. Epub 2022 May 16.

Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea.

Cost-effective, high-throughput industrial applications of metal halide perovskites in large-area displays are hampered by the fundamental difficulty of controlling the process of polycrystalline film formation from precursors, which results in the random growth of crystals, leading to non-uniform large grains and thus low electroluminescence efficiency in large-area perovskite light-emitting diodes (PeLEDs). Here we report that highly efficient large-area PeLEDs with high uniformity can be realized through the use of colloidal perovskite nanocrystals (PNCs), decoupling the crystallization of perovskites from film formation. PNCs were precrystallized and surrounded by organic ligands, and thus they were not affected by the film formation process, in which a simple modified bar-coating method facilitated the evaporation of residual solvent to provide uniform large-area films. Read More

Environ Sci Technol 2022 May 16. Epub 2022 May 16.

Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.

Thorough investigations of the environmental fate and risks are necessary for the safe application of engineered nanomaterials. Nevertheless, the current understanding of potential transformations of MoS (an intensively studied two-dimensional nanosheet) upon interactions with ubiquitous environmentally relevant thiols (ERTs) in water is limited. This study revealed that two ERTs, l-cysteine and mercaptoacetic acid, could modify MoS by covalently grafting thiol groups on S atoms of 1T phases, improving the colloidal persistence and chemical stability of MoS. Read More