Redox-active Ferrocene-dithiolenes Hybrid Complexes Showing Switchable Nonlinear Optical Properties

doi:10.1007/s40242-015-5168-1

Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (5): 792-796.doi: 10.1007/s40242-015-5168-1

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Pyrrol-2-yl-methanone Modified Silica as Electron Acceptor for the Oxidation of Water Catalyzed by Cobalt(II) Complexes

WU Yi, WANG Li, CHEN Qiuyun

School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China

Received:2015-04-24 Revised:2015-05-25 Online:2015-10-01 Published:2015-07-22
Contact: HONG Bo, E-mail: jlauhb@163.com; ZHAO Hongyan, E-mail: hyzhao@nenu.edu.cn E-mail:jlauhb@163.com;hyzhao@nenu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.41471165), the Natural Science Foundation of Jilin Province, China(No.20130101081JC) and the Scientific Research Found of Jilin Agricultural University China(No.2015049).

Abstract

Abstract:

To develop a new type of non-oxidant electron acceptors for water oxidation, 3-(methyl)phenyl-(3,5-dimethyl-1H-pyrrol-2-yl)methanone modified silica(SiO₂@py) was synthesized and used as host to Co₄O₄ cubane forming nanoparticles(SiO₂@pyCo₄). In the presence of Ru(bpy)₃²⁺ and under the irradiation of white LED(light emitting diode) light(10 W), SiO₂@pyCo₄ can catalyze water oxidation without extra electron acceptor(e.g., Na₂S₂O₈). Moreover, the turnover frequency(TOF) value of SiO₂@pyCo₄ is larger than that of Co₄O₄ cubane under the same conditions, and the longer lasting time of SiO₂@pyCo₄ indicates that SiO₂@py can enhance the stability of Co₄O₄ in water. Our results provide an economic route to develop dioxygen evolution systems based on the assembly of organic electron acceptor modified silica with active cobalt complexes.

Key words: Dithiolene, Redox, Nonlinear optical, Molecular switching, Density functional theory

YU Hailing, HONG Bo, ZHAO Hongyan. Pyrrol-2-yl-methanone Modified Silica as Electron Acceptor for the Oxidation of Water Catalyzed by Cobalt(II) Complexes[J]. Chemical Research in Chinese Universities, 2015, 31(5): 792-796.

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Pyrrol-2-yl-methanone Modified Silica as Electron Acceptor for the Oxidation of Water Catalyzed by Cobalt(II) Complexes

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