X-ray magnetic circular dichroism of size-selected, thiolated gold clusters

Yuichi Negishi, Hironori Tsunoyama, Motohiro Suzuki, Naomi Kawamura, Michio M. Matsushita, Koichi Maruyama, Tadashi Sugawara, Toshihiko Yokoyama, Tatsuya Tsukuda

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109 Citations (Scopus)

Abstract

We report herein the X-ray magnetic circular dichroism (XMCD) at the Au L2,3 edges of a series of Au clusters protected by glutathione (GSH). The samples used here included AuN(SG)M with (N, M) = (10, 10), (15, 13), (18, 14), (22, 16), (25, 18), (29, 20), (39, 24) and a sodium gold(I) thiomalate (SGT) as a reference. Magnetic moments per cluster were found to be increased with size, whereas those per Au-S bond were nearly constant. This finding suggests that a localized hole created by Au-S bonding at the gold/glutathione interface, rather than the quantum size effect, is responsible for the spin polarization of gold clusters.

Original languageEnglish
Pages (from-to)12034-12035
Number of pages2
JournalJournal of the American Chemical Society
Volume128
Issue number37
DOIs
Publication statusPublished - 2006 Sep 20
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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    Negishi, Y., Tsunoyama, H., Suzuki, M., Kawamura, N., Matsushita, M. M., Maruyama, K., Sugawara, T., Yokoyama, T., & Tsukuda, T. (2006). X-ray magnetic circular dichroism of size-selected, thiolated gold clusters. Journal of the American Chemical Society, 128(37), 12034-12035. https://doi.org/10.1021/ja062815z