American Journal of Applied Chemistry

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Effect of Substituent Groups in Rhenium Bipyridine Complexes on Photocatalytic CO2 Reduction

Received: 27 August 2014    Accepted: 20 September 2014    Published: 30 September 2014
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Abstract

We synthesized four different rhenium complexes, Re(bpy-R)(CO)3Cl (bpy = 2,2-bipyridine and R = H, CH3, COOH, or CN), as photocatalysts that selectively reduce CO2 to CO and investigated the effect of substituent groups (Rs) on the absorption and photocatalystic properties for CO2 reduction under 365-nm light irradiation. The Re(bpy-R)(CO)3Cl (R = H or CH3 or COOH) reduced CO2 to CO in CO2-saturated DMF-triethanolamine solution, which was irradiated with 365-nm light. The amount of CO produced by CO2 reduction differed, depending on the introduced Rs in the bipyridine moiety. We found that the ability of Re(bpy-R)(CO)3Cl (R = H or CH3 or COOH) to produce CO has a linear relationship to molar absorption coefficients of rhenium complexes at the irradiated light wavelength. Introduction of the COOH group, which has the highest molar absorption coefficient among four rhenium complexes, enhanced CO2-to-CO reduction capacity (6.59 mol/cat-mol2h) five times that of Re(bpy-H)(CO)3Cl with no R.

DOI 10.11648/j.ajac.20140205.12
Published in American Journal of Applied Chemistry (Volume 2, Issue 5, October 2014)
Page(s) 74-79
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

CO2 Reduction, Photocatalyst, Rhenium Bipyridine Complex

References
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Author Information
  • NTT Energy and Environment Systems Laboratories, Kanagawa, Japan; Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan

  • NTT Energy and Environment Systems Laboratories, Kanagawa, Japan

  • NTT Energy and Environment Systems Laboratories, Kanagawa, Japan; Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan

  • NTT Energy and Environment Systems Laboratories, Kanagawa, Japan; Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan

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    Yoko Ono, Jiro Nakamura, Masahiko Hayashi, Kazue Ichino Takahashi. (2014). Effect of Substituent Groups in Rhenium Bipyridine Complexes on Photocatalytic CO2 Reduction. American Journal of Applied Chemistry, 2(5), 74-79. https://doi.org/10.11648/j.ajac.20140205.12

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    Yoko Ono; Jiro Nakamura; Masahiko Hayashi; Kazue Ichino Takahashi. Effect of Substituent Groups in Rhenium Bipyridine Complexes on Photocatalytic CO2 Reduction. Am. J. Appl. Chem. 2014, 2(5), 74-79. doi: 10.11648/j.ajac.20140205.12

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    AMA Style

    Yoko Ono, Jiro Nakamura, Masahiko Hayashi, Kazue Ichino Takahashi. Effect of Substituent Groups in Rhenium Bipyridine Complexes on Photocatalytic CO2 Reduction. Am J Appl Chem. 2014;2(5):74-79. doi: 10.11648/j.ajac.20140205.12

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  • @article{10.11648/j.ajac.20140205.12,
      author = {Yoko Ono and Jiro Nakamura and Masahiko Hayashi and Kazue Ichino Takahashi},
      title = {Effect of Substituent Groups in Rhenium Bipyridine Complexes on Photocatalytic CO2 Reduction},
      journal = {American Journal of Applied Chemistry},
      volume = {2},
      number = {5},
      pages = {74-79},
      doi = {10.11648/j.ajac.20140205.12},
      url = {https://doi.org/10.11648/j.ajac.20140205.12},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ajac.20140205.12},
      abstract = {We synthesized four different rhenium complexes, Re(bpy-R)(CO)3Cl (bpy = 2,2-bipyridine and R = H, CH3, COOH, or CN), as photocatalysts that selectively reduce CO2 to CO and investigated the effect of substituent groups (Rs) on the absorption and photocatalystic properties for CO2 reduction under 365-nm light irradiation. The Re(bpy-R)(CO)3Cl (R = H or CH3 or COOH) reduced CO2 to CO in CO2-saturated DMF-triethanolamine solution, which was irradiated with 365-nm light. The amount of CO produced by CO2 reduction differed, depending on the introduced Rs in the bipyridine moiety. We found that the ability of Re(bpy-R)(CO)3Cl (R = H or CH3 or COOH) to produce CO has a linear relationship to molar absorption coefficients of rhenium complexes at the irradiated light wavelength. Introduction of the COOH group, which has the highest molar absorption coefficient among four rhenium complexes, enhanced CO2-to-CO reduction capacity (6.59 mol/cat-mol2h) five times that of Re(bpy-H)(CO)3Cl with no R.},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - Effect of Substituent Groups in Rhenium Bipyridine Complexes on Photocatalytic CO2 Reduction
    AU  - Yoko Ono
    AU  - Jiro Nakamura
    AU  - Masahiko Hayashi
    AU  - Kazue Ichino Takahashi
    Y1  - 2014/09/30
    PY  - 2014
    N1  - https://doi.org/10.11648/j.ajac.20140205.12
    DO  - 10.11648/j.ajac.20140205.12
    T2  - American Journal of Applied Chemistry
    JF  - American Journal of Applied Chemistry
    JO  - American Journal of Applied Chemistry
    SP  - 74
    EP  - 79
    PB  - Science Publishing Group
    SN  - 2330-8745
    UR  - https://doi.org/10.11648/j.ajac.20140205.12
    AB  - We synthesized four different rhenium complexes, Re(bpy-R)(CO)3Cl (bpy = 2,2-bipyridine and R = H, CH3, COOH, or CN), as photocatalysts that selectively reduce CO2 to CO and investigated the effect of substituent groups (Rs) on the absorption and photocatalystic properties for CO2 reduction under 365-nm light irradiation. The Re(bpy-R)(CO)3Cl (R = H or CH3 or COOH) reduced CO2 to CO in CO2-saturated DMF-triethanolamine solution, which was irradiated with 365-nm light. The amount of CO produced by CO2 reduction differed, depending on the introduced Rs in the bipyridine moiety. We found that the ability of Re(bpy-R)(CO)3Cl (R = H or CH3 or COOH) to produce CO has a linear relationship to molar absorption coefficients of rhenium complexes at the irradiated light wavelength. Introduction of the COOH group, which has the highest molar absorption coefficient among four rhenium complexes, enhanced CO2-to-CO reduction capacity (6.59 mol/cat-mol2h) five times that of Re(bpy-H)(CO)3Cl with no R.
    VL  - 2
    IS  - 5
    ER  - 

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