A bismetallo-organic polymer was successfully prepared by treating a metallo-ligand with Ag(+); characterization was accomplished by NMR, UV-vis, and single crystal X-ray analyses. This heteronuclear polymer achieved more than a two-fold turnover number (TON) and a faster reaction rate in comparison to a Ce-driven Ru-monomer in catalytic water oxidation.
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http://dx.doi.org/10.1039/c5dt01004g | DOI Listing |
Dalton Trans
January 2025
Anhui Province Engineering Laboratory of Advanced Building Materials, College of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, 230601, China.
A universal and green catalytic system for the hydrogenation of unsaturated aldehydes and ketones into the corresponding alcohols with the CC bonds retained under atmospheric hydrogen pressure in the water phase was realized by -functionalized amino ligand-stabilized ruthenium complexes (-PPhCHNHMe)[(CHNHR)]RuCl (R = H, Me, Et) and (-PPhCHNMe)[(CHNHEt)]RuCl with wide substrate compatibility and excellent functionality tolerance. The structural synergism between -PPhCHNHMe and (CHNHEt) achieves the enhanced performance, with a positive correlation with the electron density of the amino ligand.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Department of Battery and Chemical Engineering, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea.
Designing and constructing hierarchically structured materials with heterogeneous compositions is the key to developing an effective catalyst for overall water-splitting applications. Herein, we report the fabrication of hollow-structured selenium-doped nickel-cobalt hybrids on carbon paper as a self-supported electrode (denoted as Se-Ni|Co/CP, where Ni|Co hybrids consist of nickel-cobalt alloy-incorporated nickel-cobalt oxide). The procedure involves direct growth of zeolitic imidazolate framework-67 (ZIF-67) on bimetal-based nickel-cobalt hydroxide (NiCoOH) electrodeposited on CP, followed by selenous etching and pyrolysis to obtain the final Se-Ni|Co/CP electrocatalytic system.
View Article and Find Full Text PDFNano Lett
January 2025
National Key Laboratory of Uranium Resources Exploration-Mining and Nuclear Remote Sensing, East China University of Technology, Nanchang 330013, China.
Efficient sacrificial-agent-free photosynthesis of HO from air and water represents the greenest, lowest-cost, most real-time avenue for HO production but remains a challenging issue. Here, we show a general and effective approach through a structural design on covalent organic frameworks (COFs) with asymmetric dual-function hybrid linkages for boosting the HO photosynthesis of the COFs. Through such design we can equip a COF with not only a catalytic active center but also a special function for isolating the D-A motif, which consequently endows the COF (CI-COF) built on asymmetric dual-function hybrid linkages with a significantly enhanced efficiency in the generation, transmission, and separation of photogenerated carriers, relative to the COF (II-COF and CC-COF) built on symmetric single-function single linkages.
View Article and Find Full Text PDFOrg Lett
January 2025
Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China.
Here, we present a three-component successive radical addition strategy for the preparation of complex noncanonical α-amino acids from easily available glycine derivatives, alkenes, and aryl sulfonium salts via a copper-catalyzed photoredox-neutral catalytic cycle. The utility of this method is further demonstrated by its application in late-stage site-selective modifications of glycine residues in short peptides. It is worth noting that only 1 mol % copper catalyst is required in this reaction, demonstrating high catalytic efficiency.
View Article and Find Full Text PDFOrg Biomol Chem
January 2025
Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
The bromination of α-oxo ketene dithioacetals using KBr/HO, catalyzed by vanadium chloroperoxidase (VCPO), has been successfully demonstrated. A comparative study of enzymatic processes "on water" "in water", using 2 wt% of the surfactant TPGS-750-M revealed that the in-water protocol not only provides higher yields but also accommodates a broader substrate scope. This bromination method in an aqueous micellar medium enabled the preparation of brominated α-oxo ketene dithioacetals in fair to excellent yields (23 examples).
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