Lei Zhexuan, Liu Yiming, Tong Yujie, Mo Yitian, Ma Yuguo
Beijing National Laboratory for Molecular Sciences (BNLMS), Center for Soft Matter Science and Engineering, Key Lab of Polymer Chemistry & Physics of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, P. R. China.
Chem Asian J. 2022 May 2;17(9):e202200029. doi: 10.1002/asia.202200029. Epub 2022 Mar 16.
Organic conjugated polymers with long-range conjugation generally have strong light absorption capacity in the visible light region and impressive performance in charge transfer, which endows them great application potential in the field of opto-electronic materials. However, there are few reports on their use in photocatalytic reactions. At present, it has been reported that a variety of donor-acceptor (D-A) type organic dyes can be used in efficient organic photocatalytic transformations. We designed and synthesized one-dimensional organic conjugated polymers pPhCzBP-Th and pPhCzBP-DTh with D-A structure, and proved that they are good heterogeneous photo-redox catalysts, which can photocatalyze hydrodehalogenation reduction of α-bromoacetophenone and its derivatives. Due to the strong reducibility of the excited state, pPhCzBP-Th can also efficiently reduce α-chloroacetophenone. Furthermore, by simply wrapping the catalyst powder, high-efficient separation of products and catalysts recycling can be achieved.
具有长程共轭的有机共轭聚合物通常在可见光区域具有很强的光吸收能力，并且在电荷转移方面表现出色，这使其在光电子材料领域具有巨大的应用潜力。然而，关于它们在光催化反应中的应用报道很少。目前，已有报道称多种供体-受体（D-A）型有机染料可用于高效的有机光催化转化。我们设计并合成了具有D-A结构的一维有机共轭聚合物pPhCzBP-Th和pPhCzBP-DTh，并证明它们是良好的多相光氧化还原催化剂，可光催化α-溴苯乙酮及其衍生物的加氢脱卤还原反应。由于激发态的强还原性，pPhCzBP-Th还能高效还原α-氯苯乙酮。此外，通过简单地包裹催化剂粉末，可实现产物的高效分离和催化剂的循环利用。
