[2PS-095]
Designing Bithiazole-Based Conjugated Polymers as Alternatives to Benzothiadiazole for Photocatalytic Hydrogen Evolution
발표자김택민 (포항공과대학교)
연구책임자정대성 (포항공과대학교)
Abstract
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.