共轭微孔聚合物(CMPs)由于光吸收效率高、稳定性好、结构和能级水平易于调控等特点,已在光催化水分解制氢领域显示出优异的应用前景。为了开发新型高性能多官能团单体和探索取代基效应对CMPs光催化水分解性能的影响,通过Sonogashira-Hagihara偶联反应制备了两种三(4-乙炔苯基)胺(TEA)类CMPs,研究了取代基效应对材料性能的影响。结果表明:可见光下,苯并噻二唑(BT)单元上无取代基的FS1和BT单元5-位上带有甲基的FS2的光催化析氢速率分别为115.74μmol/(g·h)和100.61μmol/(g·h),说明TEA类CMPs具有良好的光催化水分解性能,TEA是一种性能优异的CMPs多官能团构筑单体;甲基的存在可以调控聚合物的共轭水平,进而调节其带宽,但对聚合物的析氢性能影响较小。
Conjugated microporous polymers (CMPs) have shown excellent application prospects in the field of photocatalytic water splitting hydrogen evolution due to their high light absorption efficiency,good stability,easy regulation of structure and energy level and so on.To develop novel high performance multifunctional monomers and research the substituent effect on the photocatalytic water splitting performance of CMPs,two tris(4-ethynylphenyl)amine(TEA)-based CMPs were synthesized by Sonogashira-Hagihara coupling reaction.The substituent effect on the material performance was researched in details.It suggested that the photocatalytic hydrogen evolution efficiencies of FS1 without substituent on benzothiadiazole (BT) unit and FS2 with methyl at 5-position of BT unit were 115.74μmol·g-1·h-1 and 100.61μmol·g-1·h-1,respectively.This result showed that TEA-based CMPs had good photocatalytic water splitting performance.TEA was an excellent multifunctional monomer for building CMPs.The existence of methyl could modulate the conjugation level of polymer and further change its bandgaps,however,it had less effect on the hydrogen evolution performance of the polymer.
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