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Study of the structure and electronic state of thiolate-protected gold clusters by means of 197Au Mössbauer spectroscopy

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ICAME 2011

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Abstract

We have investigated the structures and electronic states of a series of glutathionate-protected Au clusters, Au n (SG) m with n = 10 − ∼55, using 197Au Mössbauer spectroscopy, which allows us to probe the local environment of the constituent Au atoms via isomer shift (IS) and quadrupole splitting (QS). The spectral profile abruptly changes on going from Au22(SG)17 to Au25(SG)18, then it smoothly changes to that of Au∼55(SG)m. However, the spectral profile dramatically changes on going from Au∼55(SG)m to the dodecanethiolate-protected Au cluster with average diameter of 2 nm. The 197Au Mössbauer spectra of glutathionate-protected Au clusters and dodecanethiolate-protected Au clusters were successfully analyzed on the basis of the structure and electronic state of Au25(SG)18.

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Authors and Affiliations

  1. Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, 153-8902, Japan

    Norimichi Kojima, Kazuhiro Ikeda, Genta Harada & Tadashi Sugawara

  2. Research Reactor Institute, Kyoto University, Osaka, 590-0949, Japan

    Yasuhiro Kobayashi & Makoto Seto

  3. Catalysis Research Center, Hokkaido University, Hokkaido, 001-0021, Japan

    Tatsuya Tsukuda

  4. Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Tokyo, 162-8601, Japan

    Yuichi Negishi

Authors
  1. Norimichi Kojima
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  2. Kazuhiro Ikeda
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  3. Yasuhiro Kobayashi
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  4. Tatsuya Tsukuda
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  5. Yuichi Negishi
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  6. Genta Harada
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  7. Tadashi Sugawara
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  8. Makoto Seto
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Corresponding author

Correspondence to Norimichi Kojima .

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Editors and Affiliations

  1. Shizuoka Institute, Fukuroi, Japan

    Yutaka Yoshida

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Kojima, N. et al. (2013). Study of the structure and electronic state of thiolate-protected gold clusters by means of 197Au Mössbauer spectroscopy. In: Yoshida, Y. (eds) ICAME 2011. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-4762-3_96

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