Highly Efficient Photocatalytic Water Reduction with Robust Iridium(III) Photosensitizers Containing Arylsilyl Substituents

Authors

  • Dong Ryeol Whang,

    1. Center for Supramolecular Optoelectronic Materials, WCU Hybrid Materials Program and Department of Materials Science and Engineering, Seoul National University, Seoul 151-744 (Korea) http://csom.snu.ac.kr
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  • Prof. Ken Sakai,

    1. Department of Chemistry, Faculty of Sciences, Kyushu University, Hakozaki 6-10-1, Higashi-ku, Fukuoka 812-8581 (Japan)
    2. International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University (Japan)
    3. International Research Center for Molecular Systems (IRCMS), Kyushu University (Japan)
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  • Prof. Soo Young Park

    Corresponding author
    1. Center for Supramolecular Optoelectronic Materials, WCU Hybrid Materials Program and Department of Materials Science and Engineering, Seoul National University, Seoul 151-744 (Korea) http://csom.snu.ac.kr
    • Center for Supramolecular Optoelectronic Materials, WCU Hybrid Materials Program and Department of Materials Science and Engineering, Seoul National University, Seoul 151-744 (Korea) http://csom.snu.ac.kr

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  • This research was supported by the National Research Foundation of Korea (NRF) through a grant funded by the Korean government (MSIP; No. 2009-0081571). The research at Kyushu University was supported by the International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), sponsored by the World Premier International Research Center Initiative (WPI), MEXT (Japan).

Abstract

original image

Waterproof complexes: Cationic IrIII photosensitizers (PSs) with an ancillary 4,4′-bis(4-(triphenylsilyl)phenyl)-2,2′-bipyridine ligand enabled hydrogen evolution from water with high turnover numbers (TONs; see scheme). The peripheral triphenylsilyl moieties prevent ligand substitution by solvent molecules, such as water, and thus increase the durability of the complexes. SR=sacrificial reducing agent, WRC=water-reduction catalyst.

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