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摘要
Aimed in the development of functionalized nitrogen ligands, a series of novel 2,9-dialkoxy1-4,7dipheny1-1,10-phenanthroline ligands 5a similar to 5e were designed and synthesized from 4,7-dipheny1-1,10-phenanthroline under quaternization, oxidation, halogenation and etherification. Then using Xantphos as phosphorus ligands, a series of heteroleptic copper photosensitizers (CuPS A similar to H) were obtained by the in-situ method. In homogeneous photocatalytic water reduction system, their photosensitive activity for hydrogen production was studied. Research results show that 2,9-diethoxy is the preferred substituent and the turnover number for hydrogen production (TON) of CuPS D is up to 270. In the analysis of photoelectric physical properties, it is found that this kind of heteroleptic copper complexes have a pair of similar redox potentials (E-oxd=-0.8 V, E-red=-1.2 V). Compared with other substituents in Cu-based complexes, CuPS D shows the weakest fluorescence, which indicates the ethoxy substituent could improve the photochemical conversion ability of CuPS by increasing the fluorescence quenching efficiency.
- 出版日期2018-2-10
- 单位浙江工业大学
