One‐Dimensional Organic Conjugated Polymers as Recyclable Heterogeneous Photocatalysts

Abstract

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.