Molecular modification: A promising strategy for the design of donor-acceptor-type organic polymers photocatalyst

Organic polymers (OPs), including conjugated polymers, conjugated microporous polymers, and conjugated organic frameworks, have garnered increasing attention in recent years due to their exceptional photocatalytic performance and recombinable molecular building blocks. The intramolecular charge transfer (ICT) within OPs is instrumental in achieving efficient photocatalysis. Moreover, the intermolecular electron donor-acceptor (D-A) structure is aimed at optimizing ICT, which could be accomplished by molecular modification. In this paper, we outline the comprehensive approaches for constructing D-A structure through molecular modification, and discuss the fundamental principles of enhancing the photocatalytic activity of D-A OPs in detail. Furthermore, we summarize the application of modified D-A OPs in resolving prevalent environmental and energy problems. This method is widely recognized as a promising solution to address the current bottleneck in photocatalysis. Thus, this review aims to enhance the fundamental comprehension of D-A OPs created through molecular modification and explore innovative strategies for addressing existing environmental challenges.