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[BTT-PDAN-CMP] Benzotrithiophene conjugated microporous polymer photocatalysts for selective aerobic sulfoxidation driven by green light
Summary:
The authors from Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Wuhan University, developed a benzotrithiophene conjugated microporous polymer (BTT-PDAN-CMP) with excellent optoelectronic properties, achieving high efficiency in selective aerobic sulfoxidation driven by green light.
Background:
1. To address the limitations of existing photocatalysts in visible light absorption and electron transfer, previous researchers conducted work on various porous organic materials, achieving some success. However, there are still problems with efficiency and stability.
2. The authors proposed an innovative method to synthesize BTT-PDAN-CMP and BTT-PDA-COF using vinylene and imine linkages, respectively, obtaining significant improvements in photocatalytic performance.
Research Content:
1. Synthesis:
The authors synthesized BTT-PDAN-CMP and BTT-PDA-COF using Knoevenagel and aldimine condensations, respectively.
2. Characterizations:
1) BET results showed a specific surface area of 12 m²/g for BTT-PDAN-CMP and 1432 m²/g for BTT-PDA-COF. Pore size distribution indicated uniform pores in BTT-PDA-COF.
2) SEM/TEM tests revealed rod-like structures with particle sizes of approximately 20 nm.
3) UV–visible DRS showed strong absorption in the visible region, with bandgaps of 2.07 eV for BTT-PDAN-CMP and 2.17 eV for BTT-PDA-COF.
3. Application:
The materials were tested in selective aerobic sulfoxidation. BTT-PDAN-CMP demonstrated superior efficiency, achieving over 90% conversion and 99% selectivity for phenyl methyl sulfoxide.
4. Mechanism:
The analysis of experimental results and calculations indicated that BTT-PDAN-CMP activates molecular oxygen to form superoxide and singlet oxygen, contributing to the selective formation of sulfoxides. The vinylene linkage enhances electron transfer, improving photocatalytic performance.
Outlook:
This research provides a novel and efficient platform for visible light photocatalysis using benzotrithiophene-based materials. The strategic design of BTT-PDAN-CMP highlights its potential for green light-driven organic transformations, with excellent efficiency and recyclability.
Benzotrithiophene conjugated microporous polymer photocatalysts for selective aerobic sulfoxidation driven by green light
Authors: Fengwei Huang, Yuexin Wang, Keke Zhang, Xianjun Lang
DOI: 10.1016/j.cattod.2024.114671
Link: https://www.sciencedirect.com/science/article/pii/S0920586124001652
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