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| Construction of a Noble-Metal-Free Nickel Metal-Organic Macrocycle for Photocatalytic Hydrogen Production |
| Author Name | Affiliation | E-mail | | LI He-Chuan | State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116024, China | | | LI Ming-Feng | State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116024, China | | | HE Cheng | State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116024, China | hecheng@dlut.edu.cn | | DUAN Chun-Ying | State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116024, China | |
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| Abstract: A nickel based metal-organic macrocycle[Ni2(L2)2(CH3CN)4](ClO4)4·4CH3CN (2) constructed from bidentate Schiff base ligand L2 (L2=1,4-benzenedicarboxaldehyde-bis(2'-pyridinylhydrazone)) with multiple N atoms was utilized to produce hydrogen through splitting of water by visible light (λ>400 nm). This noble-metal-free photocatalytic system consists of a catalyst, photosensitizer (fluorescein, Fl) and sacrificial electron donor (Triethylamine, NEt3). Using the metal-organic macrocycle 2 as a proton reduction catalyst, the activity of the photocatalytic system is high, with a turnover number (TON) of approximately 3 100 molH2·molcat-1. In contrast to the metal-organic macrocycle 2, a mononuclear complex[Ni(L1)2(CH3CN)2](ClO4)2 (1, L1=3-formyl benzaldehyde-2'-pyridylhydrazone) with similar coordination environment has a low efficiency on producing hydrogen. The enhanced efficiency of the catalyst 2 is likely ascribed to the formation of supramolecular complex between fluorescein and the macrocycle which enhances the efficiency of photoinduced electron transfer. |
| Keywords: metal-organic macrocycle nickel light driven H2 production supramolecular |
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| LI He-Chuan,LI Ming-Feng,HE Cheng,DUAN Chun-Ying.Construction of a Noble-Metal-Free Nickel Metal-Organic Macrocycle for Photocatalytic Hydrogen Production[J].Chinese Journal of Inorganic Chemistry,2018,34(1):11-19. |
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