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4,4′-Bipyridine axially coordinated binuclear cobaloxime complexes as molecular catalysts for light-driven hydrogen evolution

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Abstract

Reactions of [Co(dmgH)(dmgH2)Cl2] (dmgH = dimethylglyoxime) or [Co(chdH)(chdH2)Cl2] (chd = 1,2-cyclohexanedione dioximate) with 4,4′-bipyridine in MeOH in the presence of Et3N resulted in the formation of binuclear cobaloxime complexes [{Co(dmgH)2Cl}2(bipy)] (1, bipy = 4,4′-bipyridine) and [{Co(chdH)2Cl}2(bipy)] (2) in good yields. Complexes 1 and 2 were characterized by NMR and X-ray crystallography. Both 1 and 2 were found to be molecular catalysts for light-driven hydrogen evolution in the presence of Eosin Y as photosensitizer and triethanolamine as sacrificial electron donor in aqueous acetonitrile solutions upon irradiation.

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Acknowledgments

We are grateful to the National Natural Science Foundation of China (Grant No. 21202115), The Research Fund for the Doctoral Program of Higher Education (Grant No. 20100032120070) and Tianjin Research Program of Application Foundation and Advanced Technology (Grant No. 13JCQNJC06100). The author gratefully acknowledges the support of K.C. Wong Education Foundation.

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Authors and Affiliations

  1. Department of Chemical Engineering, Center of Analysis and Testing, Ningbo University of Technology, Ningbo, 315016, China

    Xu-Feng Liu & Ying-Xin Zhang

  2. School of Science, Tianjin University, Tianjin, 300072, China

    Jing Yan

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  1. Xu-Feng Liu
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  2. Ying-Xin Zhang
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  3. Jing Yan
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Correspondence to Xu-Feng Liu or Jing Yan.

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Liu, XF., Zhang, YX. & Yan, J. 4,4′-Bipyridine axially coordinated binuclear cobaloxime complexes as molecular catalysts for light-driven hydrogen evolution. Transition Met Chem 40, 305–311 (2015). https://doi.org/10.1007/s11243-015-9918-1

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  • DOI: https://doi.org/10.1007/s11243-015-9918-1

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