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Noble-Metal-Free ZnII-Anchored Pyrene-Based Covalent Organic Framework (COF) for Photocatalytic Fixation of CO2 from Dilute Gas into Bioactive 2-Oxazolidinones.
ChemSusChem
January 2025
Indian Institute of Technology Ropar, Chemistry, Nangal Road, 140001, Rupnagar, INDIA.
Photocatalytic conversion of CO2 into value-added chemicals offers a propitious alternative to traditional thermal methods, contributing to environmental remediation and energy sustainability. In this respect, covalent organic frameworks (COFs), are crystalline porous materials showcasing remarkable efficacy in CO2 fixation facilitated by visible light owing to their excellent photochemical properties. Herein, we employed Lewis acidic Zn(II) anchored pyrene-based COF (Zn(II)@Pybp-COF) to facilitate the photocatalytic CO2 utilization and transformation to 2-oxazolidinones.
View Article and Find Full Text PDFExploring Supramolecular Frustrated Lewis Pairs.
Chempluschem
January 2025
Keele University, School of Chemical & Physical Sciences, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.
Frustrated Lewis pairs (FLPs) have rapidly become one of the key metal-free catalysts for a variety of chemical transformations. Embedding these catalysts within a supramolecular assembly can offer improvements to factors such as recyclability and selectivity. In this review we discuss advances in this area, covering key supramolecular assemblies such as metal organic frameworks (MOFs), covalent organic frameworks (COFs), polymers and macrocycles.
View Article and Find Full Text PDFI-Catalyzed benzylation of NH-sulfoximines with diarylmethanes and alkylarenes.
Org Biomol Chem
January 2025
College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
A practical transition metal-free approach for the selective benzylation of NH-sulfoximines has been disclosed by using simple elemental iodine as the catalyst and -butyl hydroperoxide (TBHP) as the terminal oxidant. Comparing with known methods for the construction of -benzylated sulfoximines, our protocol shows broad substrate scope with respect to both diarylmethanes and alkylarenes, and can be conducted in air with good functional group tolerance.
View Article and Find Full Text PDFHeterogeneous Frustrated Lewis Pair Catalysts: Rational Structure Design and Mechanistic Elucidation Based on Intrinsic Properties of Supports.
Acc Chem Res
January 2025
The Wolfson Catalysis Centre, Department of Chemistry, University of Oxford, Oxford OX1 3QR, U.K.
ConspectusThe discovery of reversible hydrogenation using metal-free phosphoborate species in 2006 marked the official advent of frustrated Lewis pair (FLP) chemistry. This breakthrough revolutionized homogeneous catalysis approaches and paved the way for innovative catalytic strategies. The unique reactivity of FLPs is attributed to the Lewis base (LB) and Lewis acid (LA) sites either in spatial separation or in equilibrium, which actively react with molecules.
View Article and Find Full Text PDFUnderstanding the effects of adduct functionalization on C nanocages for the hydrogen evolution reaction.
Nanoscale Horiz
January 2025
Department of Chemical Engineering, Hampton University, Hampton, VA 23668, USA.
In this work, we use experimental and theoretical techniques to study the origin of the boosted hydrogen evolution reaction (HER) catalytic activity of two pyridyl-pyrrolidine functionalized C fullerenes. Notably, the mono-(pyridyl-pyrrolidine) penta-adduct of C has exhibited a remarkable HER catalytic activity as a metal-free catalyst, delivering an overpotential () of 75 mV RHE and a very low onset potential of -45 mV RHE. This work addresses fundamental questions about how functionalization on C changes the electron density on fullerene cages for high-performance HER electrocatalysis.
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