Formation of alkanethiolate-protected gold clusters with unprecedented core sizes in the thiolation of polymer-stabilized gold clusters

Hironori Tsunoyama; Patricia Nickut; Yuichi Negishi; Katharina Al-Shamery; Yoshiyasu Matsumoto; Tatsuya Tsukuda

doi:10.1021/jp067025q

Formation of alkanethiolate-protected gold clusters with unprecedented core sizes in the thiolation of polymer-stabilized gold clusters

Hironori Tsunoyama, Patricia Nickut, Yuichi Negishi, Katharina Al-Shamery, Yoshiyasu Matsumoto, Tatsuya Tsukuda

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

80 Citations (Scopus)

Abstract

Octadecanethiolate-protected gold (Au:SC₁₈) clusters were prepared by the reaction of C₁₈SH and Au clusters stabilized by poly(N-vinyl-2-pyrrolidone) (PVP). Four samples were fractionated by recycling size exclusion chromatography of the as-prepared Au:SC₁₈ clusters, and their core sizes were determined to be 8, 11, 21, and 26 kDa by using laser desorption ionization mass spectrometry. Unexpectedly, the sequence of these core sizes is different from that (8, 14, 22, and 29 kDa) obtained by conventional reduction of Au(I)-SC₁₈ polymers, which is governed by kinetic factors. The present finding shows that the Au:SR (R = organic group) clusters with a high tolerance to thiol etching can be systematically synthesized by first populating precursory Au clusters in a PVP matrix with subsequent thiolation of the preformed Au clusters.

Original language	English
Pages (from-to)	4153-4158
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	11
DOIs	https://doi.org/10.1021/jp067025q
Publication status	Published - 2007 Mar 22
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Formation of alkanethiolate-protected gold clusters with unprecedented core sizes in the thiolation of polymer-stabilized gold clusters",

abstract = "Octadecanethiolate-protected gold (Au:SC18) clusters were prepared by the reaction of C18SH and Au clusters stabilized by poly(N-vinyl-2-pyrrolidone) (PVP). Four samples were fractionated by recycling size exclusion chromatography of the as-prepared Au:SC18 clusters, and their core sizes were determined to be 8, 11, 21, and 26 kDa by using laser desorption ionization mass spectrometry. Unexpectedly, the sequence of these core sizes is different from that (8, 14, 22, and 29 kDa) obtained by conventional reduction of Au(I)-SC18 polymers, which is governed by kinetic factors. The present finding shows that the Au:SR (R = organic group) clusters with a high tolerance to thiol etching can be systematically synthesized by first populating precursory Au clusters in a PVP matrix with subsequent thiolation of the preformed Au clusters.",

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AU - Tsunoyama, Hironori

AU - Nickut, Patricia

AU - Negishi, Yuichi

AU - Al-Shamery, Katharina

AU - Matsumoto, Yoshiyasu

AU - Tsukuda, Tatsuya

PY - 2007/3/22

Y1 - 2007/3/22

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AB - Octadecanethiolate-protected gold (Au:SC18) clusters were prepared by the reaction of C18SH and Au clusters stabilized by poly(N-vinyl-2-pyrrolidone) (PVP). Four samples were fractionated by recycling size exclusion chromatography of the as-prepared Au:SC18 clusters, and their core sizes were determined to be 8, 11, 21, and 26 kDa by using laser desorption ionization mass spectrometry. Unexpectedly, the sequence of these core sizes is different from that (8, 14, 22, and 29 kDa) obtained by conventional reduction of Au(I)-SC18 polymers, which is governed by kinetic factors. The present finding shows that the Au:SR (R = organic group) clusters with a high tolerance to thiol etching can be systematically synthesized by first populating precursory Au clusters in a PVP matrix with subsequent thiolation of the preformed Au clusters.

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Formation of alkanethiolate-protected gold clusters with unprecedented core sizes in the thiolation of polymer-stabilized gold clusters

Abstract

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