A Carbazolyl Porphyrin‐Based Conjugated Microporous Polymer for Metal‐Free Photocatalytic Aerobic Oxidation Reactions

ChemCatChem ◽  
2020 ◽  
Vol 12 (13) ◽  
pp. 3523-3529 ◽  
Author(s):  
Jun Jiang ◽  
Zhongxiu Liang ◽  
Xiaoyan Xiong ◽  
Xiantai Zhou ◽  
Hongbing Ji
Keyword(s):  
Aerobic Oxidation ◽  
Oxidation Reactions ◽  
Metal Free ◽  
Conjugated Microporous Polymer ◽  
Microporous Polymer

Boranil-based conjugated microporous polymer for the efficient visible-light-driven heterogeneous photocatalysis

2021 ◽  
Author(s):  
Weitao Gong ◽  
Xiaorong Deng ◽  
Kaixun Dong ◽  
Lu Liu ◽  
Guiling Ning
Keyword(s):  
Visible Light ◽  
Organic Dyes ◽  
Heterogeneous Photocatalysis ◽  
Metal Free ◽  
Microporous Polymers ◽  
Conjugated Microporous Polymer ◽  
Microporous Polymer ◽  
Visible Light Driven ◽  
Conjugated Microporous Polymers

The incorporation of pure organic dyes into the backbone of conjugated microporous polymers (CMPs) opens a new avenue for facile constructing metal-free heterogeneous photocatalysts with tailor-made properties. Herein, we presented...

scholarly journals Metal-Free Pyrene-Based Conjugated Microporous Polymer Catalyst Bearing N- and S-Sites for Photoelectrochemical Oxygen Evolution Reaction

2021 ◽  
Vol 9 ◽  
Author(s):  
Sabuj Kanti Das ◽  
Sanjib Shyamal ◽  
Manisha Das ◽  
Saptarsi Mondal ◽  
Avik Chowdhury ◽  
...  
Keyword(s):  
Surface Area ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Magic Angle Spinning ◽  
Bandgap Energy ◽  
Magic Angle ◽  
Low Bandgap ◽  
Metal Free ◽  
Conjugated Microporous Polymer ◽  
Microporous Polymer

The development of an efficient, sustainable, and inexpensive metal-free catalyst for oxygen evolution reaction (OER) via photoelectrochemical water splitting is very demanding for energy conversion processes such as green fuel generators, fuel cells, and metal-air batteries. Herein, we have developed a metal-free pyrene-based nitrogen and sulfur containing conjugated microporous polymer having a high Brunauer-Emmett-Teller surface area (761 m2 g−1) and a low bandgap of 2.09 eV for oxygen evolution reaction (OER) in alkaline solution. The π-conjugated as-synthesized porous organic material (PBTDZ) has been characterized by Fourier transform infrared spectroscopy (FT-IR), solid-state 13C (cross-polarization magic angle spinning-nuclear magnetic resonance) CP-MAS NMR, N2 adsorption/desorption analysis, field-emission scanning electron microscope (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA) experiments. The material acts as an efficient catalyst for photoelectrochemical OER with a current density of 80 mA/cm2 at 0.8 V vs. Ag/AgCl and delivered 104 µmol of oxygen in a 2 h run. The presence of low bandgap energy, π-conjugated conducting polymeric skeleton bearing donor heteroatoms (N and S), and higher specific surface area associated with inherent microporosity are responsible for this admirable photoelectrocatalytic activity of PBTDZ catalyst.

Oxidase Catalysis via an Aerobically Generated Dess-Martin Periodinane Analogue

2018 ◽  
Author(s):  
Asim Maity ◽  
Sung-Min Hyun ◽  
Alan Wortman ◽  
David Powers
Keyword(s):  
Chemical Synthesis ◽  
Aerobic Oxidation ◽  
Substrate Oxidation ◽  
Oxidation Catalysis ◽  
Hypervalent Iodine ◽  
Oxidation Reactions ◽  
Broad Array ◽  
Oxidation Chemistry ◽  
Reactive Oxidants

<p>Hypervalent iodine(V) reagents, such as Dess-Martin periodinane (DMP) and 2-iodoxybenzoic acid (IBX), are broadly useful oxidants in chemical synthesis. Development of strategies to access these reagents from O2 would immediately enable use of O2 as a terminal oxidant in a broad array of substrate oxidation reactions. Recently we disclosed the aerobic synthesis of I(III) reagents by intercepting reactive oxidants generated during aldehyde autoxidation. Here, we couple aerobic oxidation of iodobenzenes with disproportionation of the initially generated I(III) compounds to generate I(V) reagents. The aerobically generated I(V) reagents exhibit substrate oxidation chemistry analogous to that of DMP. Further, the developed aerobic generation of I(V) has enabled the first application of I(V) intermediates in aerobic oxidation catalysis.</p>

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