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Platinum-Cobalt Dinuclear Complex：Synthesis, Photophysical Properties and Visible Light-Driven Hydrogen Production from Water
Author NameAffiliationE-mail
Han A-Li Key Laboratory of Materials for Energy Conversion of Chinese Academy of Sciences & Department of Materials Science and Engineering, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026 China  
Du Ping-Wu Key Laboratory of Materials for Energy Conversion of Chinese Academy of Sciences & Department of Materials Science and Engineering, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026 China dupingwu@ustc.edu.cn 
Abstract: A platinum sensitizer-cobalt dinuclear complex, [Pt(tBu3tpy)([C≡C-C6H4N])-Co(dmgH)2PyCl, 5] (tBu3tpy=4,4',4"-tri(tert-butyl)-2,2':6',2"-terpyridine, C6H4N=4-pyridyl, dmgH=dimethylglyoxime, Py=pyridine), has been synthesized and characterized. The complex 5 shows absorption spectra in the visible region, which are assigned to mainly metal-to-ligand charge transfer (MLCT) character from the platinum sensitizer part. The cobalt moiety in complex 5 could quench the luminescence of the platinum part, indicating a possible process of intramolecular electron transfer. This dinuclear complex has been used for light-driven catalytic hydrogen production from water in the presence of triethanolamine (TEOA). The hydrogen production is affected by many factors, such as pH value and solvent. And the results show that this molecular catalyst could be decomposed to release the platinum based photosensitizer, as confirmed by absorption spectra and mass spectrometry.
Keywords: platinum  photosensitizer  cobalt  hydrogen production
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Han A-Li,Du Ping-Wu.Platinum-Cobalt Dinuclear Complex：Synthesis, Photophysical Properties and Visible Light-Driven Hydrogen Production from Water[J].Chinese Journal of Inorganic Chemistry,2013,29(8):1703-1709.
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Chinese Journal of Inorganic Chemistry