title: Enhanced photocatalytic hydrogen production from an MCM-41-immobilized photosensitizer-[Fe-Fe] hydrogenase mimic dyad.
abstract: A covalently linked photosensitizer-catalytic center dyad Ps-Hy, consisting of two bis(2-phenylpyridine)(2,2'-bipyridine)iridium(iii) chromophores (Ps) and a diiron hydrogenase mimic (Hy) was constructed by using click reaction. Ps-Hy was incorporated into K(+)-exchanged molecular sieve MCM-41 to form a composite (Ps-Hy@MCM-41), which has been successfully applied to the photochemical production of hydrogen. The catalytic activity of Ps-Hy@MCM-41 is ∼3-fold higher as compared with that of Ps-Hy in the absence of MCM-41. The incorporation of Ps-Hy into MCM-41 stabilizes the catalyst, and consequently, advances the photocatalysis. The present study provides a potential strategy for improving catalytic efficiency of artificial photosynthesis systems using mesoporous molecular sieves.
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. yili@mail.ipc.ac.cn tianjun_yu@mail.ipc.ac.cn.
authors.forename: Wen
authors.initials: W
authors.lastname: Wang
authors.forename: Tianjun
authors.initials: T
authors.lastname: Yu
authors.forename: Yi
authors.initials: Y
authors.lastname: Zeng
authors.forename: Jinping
authors.initials: J
authors.lastname: Chen
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Yang
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry; D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry* / Q000378:metabolism; D006859:Hydrogen / Q000737:chemistry*; D006864:Hydrogenase / Q000737:chemistry / Q000378:metabolism; D007495:Iridium / Q000737:chemistry; D007506:Iron-Sulfur Proteins / Q000737:chemistry / Q000378:metabolism; D008027:Light; D017319:Photosensitizing Agents / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D007506:Iron-Sulfur Proteins; C509968:MCM-41; D017319:Photosensitizing Agents; D007495:Iridium; D015082:2,2'-Dipyridyl; D012822:Silicon Dioxide; D006859:Hydrogen; C118830:iron hydrogenase; D006864:Hydrogenase