Affiliation:
1. Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou 215123 China
2. Jiangsu Key Laboratory for Advanced Negative Carbon Technologies Soochow University Suzhou 215123 China
3. Macao Institute of Materials Science and Engineering (MIMSE) MUST‐SUDA Joint Research Center for Advanced Functional Materials Macau University of Science and Technology Macao 999078 China
Abstract
AbstractPolymer semiconductors hold great promise for photocatalytic hydrogen production due to their diverse structures and functions. Nevertheless, their photocatalytic performances are usually compromised by rapid charge recombination. Herein, a molecular regioisomerism strategy of benzobisthiazole (BT)‐based conjugated polymers is proposed for manipulating their optoelectronic properties through varying the conjugation directions of BT units. Despite subtle structural differences, the 4,8‐subsituted sample LCP‐BT‐48 exhibits an remarkably improved charge separation capability and a sixfold increase in the photocatalytic hydrogen production rate in comparison with those of the 2,6‐subsituted counterpart. Theoretical analysis demonstrates that the superior optoelectronic property of LCP‐BT‐48 is attributed to its sp2 carbon‐conjugated skeletons and enhanced local polarization electric field between BT and neighboring π‐units. This work provides a new paradigm for regulating charge‐transfer dynamics in conjugated polymers for efficient photocatalysis.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangsu Province
China Postdoctoral Science Foundation
Collaborative Innovation Center of Suzhou Nano Science and Technology
Higher Education Discipline Innovation Project