期刊
INORGANIC CHEMISTRY
卷 59, 期 3, 页码 1611-1621出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.9b01838
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资金
- North East Centre for Energy Materials [EP/R021503/1]
- General Secretariat for Research and Technology (GSRT)
- Hellenic Foundation for Research and Innovation (HFRI) [508]
- European Union
- Greek national funds through the Operational Program Competitiveness, Entrepreneurship, and Innovation, under the call RESEARCH CREATE INNOVATE [T1EDK-01504]
- Greek national funds through the Regional Operational Program Crete 2014-2020 [OPS: 5029187]
- European Commission's Seventh Framework Program (FP7/2007-2013) [229927]
- Special Research Account of the University of Crete
- EPSRC [EP/R021503/1] Funding Source: UKRI
We report a comparison between a series of zinc and tin porphyrins as photosensitizers for photochemical hydrogen evolution using cobaloxime complexes as molecular catalysts. Among all the chromophores tested, only the positively charged zinc porphyrin, [ZnTMePyP4+]Cl-4, and the neutral tin porphyrin derivatives, Sn(OH)(2)TPyP, Sn(Cl-2)TPP-[COOMe](4), and Sn(Cl-2)TPP-[PO(OEt)(2)](4), were photocatalytically active. Hydrogen evolution was strongly affected by the pH value as well as the different concentrations of both the sensitizer and the catalyst. A comprehensive photophysical and electrochemical investigation was conducted in order to examine the mechanism of photocatalysis. The results derived from this study establish fundamental criteria with respect to the design and synthesis of porphyrin derivatives for their application as photosensitizers in photoinduced hydrogen evolution.
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