Ultrathin organic polymer with p-π conjugated structure for simultaneous photocatalytic disulfide bond generation and CO2 reduction

• Published in: Journal of energy chemistry 2023-01, Vol.76, p.639-647
• Main Authors: Hou, Linquan, Tang, Zhunyun, Mao, Guojiang, Yin, Shiheng, Long, Bei, Ouyang, Tao, Deng, Guo-Jun, Ali, Atif, Song, Ting
• Format: Article
• Language: English
• Subjects: CO2 reduction; Disulfide bond; High activity; Organic polymer; Photocatalytic coupled reaction
• ISSN: 2095-4956
• DOI: 10.1016/j.jechem.2022.10.003

Ultrathin organic polymer with p-π conjugated structure toward the selective dehydrogenative coupling of benzyl mercaptan to SS coupled products combined with CO2 reduction has been constructed through a facile synthetic strategy. [Display omitted] Combining photocatalytic organic reactions with CO2 reduction is an efficient solar energy utilization mode, but it is still limited by the organic species that can be matched and the low conversion. Herein, ultrathin organic polymer with p-π conjugated structure (TPP) was rationally designed and prepared, and showed a high yield of CO (15.2 mmol g−1) and conversion of SS coupled products (100%), far exceeding the organic polymer with PO structure. The enhanced photoredox activity of TPP is ascribed to the orbital interaction between the p-orbital on phosphorus and the π-orbitals of aromatic, which can accelerate the photoinduced charge carrier separation and improve the CO2 adsorption capacity. TPP can also be used for the dehydrocoupling of various benzyl mercaptans to the corresponding SS bond products. This work provides a new concept for the efficient synthesis of disulfide bonds combined with CO2 reduction in a photoreaction system.