Designing Bithiazole-Based Conjugated Polymers as Alternatives to Benzothiadiazole for Photocatalytic Hydrogen Evolution
발표자
김택민 (포항공과대학교)
연구책임자
정대성 (포항공과대학교)
공동저자
김택민 (포항공과대학교), 정대성 (포항공과대학교)
초록
내용
The photocatalytic hydrogen evolution on bithiazole (Tz)-based conjugated polymers were first demonstrated, establishing Tz as a new building block beyond conventional benzothiadiazole (BT) systems. Two Tz-based donor–acceptor polymers were synthesized: one consisting of fluorene and Tz units (PFOTz), and the other incorporating a thiophene π-spacer between Tz units (PFOTzT). The thiophene structure leads to a more ordered nanostructure within the resulting nanoparticles, promoting stronger interchain interactions and red-shifted absorption. Both Tz-based polymers showed HER activity, but PFOTzT exhibited significantly higher HER activity. TR-PL and TAS revealed that its superior performance arises from efficient exciton dissociation and suppressed charge recombination, resulting in prolonged carrier lifetimes. These results establish Tz as a alternative to BT in the design of high-performance organic photocatalysts and underscore the crucial impact of nanoscale engineering.