Photocatalytic generation of hydrogen from water using a platinum(II) terpyridyl acetylide chromophore
Photocatalytic generation of hydrogen from water using a platinum(II) terpyridyl acetylide chromophore
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DOI：
10.1021/ja0610683
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发表时间：
2006-06-21
影响因子：
15
通讯作者：
Eisenberg, Richard
中科院分区：
文献类型：
--
作者：
Du, Pingwu;Schneider, Jacob;Eisenberg, Richard
阳离子配合物[铂(甲苯基三吡啶)(苯乙酰)]+被用作光敏剂，用于在牺牲电子给体存在下还原水溶液中的质子以制备氢气。在该体系中，三乙醇胺(TEOA)作为牺牲性还原剂，甲基紫精(MV2+)作为电子转移剂，聚丙烯酸酯稳定的胶体铂作为H_2生成的催化剂。铂(II)生色团同时经历氧化猝灭和还原猝灭，而H_2只有在TEOA和MV2+同时存在时才能看到。反应溶液用λ>；410 nm辐射10h，转化率为85%，总收率为34%。虽然该体系在pH为7时的析氢能力最强，但与早期报道的使用Ru(Bpy)32+作为光敏剂的情况不同，在pH为5和9时也能看到这一现象。这是首次将铂二亚胺或联吡啶作为光敏剂用于质子水溶液中生成H_2。
The cationic complex [Pt(tolylterpyridine)(phenylacetylide)]+has been used as a photosensitizer for the reduction of aqueous protons in the presence of a sacrificial electron donor to make H2. In this system, triethanolamine (TEOA) acts as the sacrificial reducing agent, methyl viologen (MV2+) serves as an electron transfer agent, and colloidal Pt stabilized by polyacrylate functions as the catalyst for H2generation. The Pt(II) chromophore undergoes both oxidative and reductive quenching, but H2is only seen when both TEOA and MV2+are present. Irradiation of the reaction solution for 10 h with λ > 410 nm leads to 85 turnovers and an overall yield of 34% based on TEOA. While H2evolution is maximized for the system at pH 7, it is also seen at pH 5 and 9, in contrast with earlier reports using Ru(bpy)32+as the photosensitizer. This is the first time that a Pt diimine or terpyridyl complex has been used as the photosensitizer for H2generation from aqueous protons.