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

doi:10.1021/ja062815z

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

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

120 Citations (Scopus)

Abstract

We report herein the X-ray magnetic circular dichroism (XMCD) at the Au L_2,3 edges of a series of Au clusters protected by glutathione (GSH). The samples used here included Au_N(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 language	English
Pages (from-to)	12034-12035
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	128
Issue number	37
DOIs	https://doi.org/10.1021/ja062815z
Publication status	Published - 2006 Sept 20

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja062815z

Cite this

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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.",

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T1 - X-ray magnetic circular dichroism of size-selected, thiolated gold clusters

AU - Negishi, Yuichi

AU - Tsunoyama, Hironori

AU - Suzuki, Motohiro

AU - Kawamura, Naomi

AU - Matsushita, Michio M.

AU - Maruyama, Koichi

AU - Sugawara, Tadashi

AU - Yokoyama, Toshihiko

AU - Tsukuda, Tatsuya

PY - 2006/9/20

Y1 - 2006/9/20

N2 - 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.

AB - 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.

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JO - Journal of the American Chemical Society

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ER -

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

Abstract

ASJC Scopus subject areas

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