Isolation and structural characterization of an octaneselenolate-protected Au25 cluster

Yuichi Negishi; Wataru Kurashige; Ukyo Kamimura

doi:10.1021/la203301p

Isolation and structural characterization of an octaneselenolate-protected Au25 cluster

Langmuir. 2011 Oct 18;27(20):12289-92. doi: 10.1021/la203301p. Epub 2011 Sep 23.

Authors

Yuichi Negishi¹, Wataru Kurashige, Ukyo Kamimura

Affiliation

¹ Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Tokyo 162-8601, Japan. negishi@rs.kagu.tus.ac.jp

PMID: 21928858
DOI: 10.1021/la203301p

Abstract

We report the isolation and structural characterization of an octaneselenolate-protected Au(25) cluster ([Au(25)(SeC(8)H(17))(18)](-)). Isolated [Au(25)(SeC(8)H(17))(18)](-) was characterized by various analytical techniques. The results strongly suggest that [Au(25)(SeC(8)H(17))(18)](-) possesses a similar geometric structure to the well-studied thiolate (RS)-protected Au(25) cluster ([Au(25)(SR)(18)](-)) and that the charge transfer between the metal atoms and ligands in [Au(25)(SeC(8)H(17))(18)](-) is lower than that in [Au(25)(SR)(18)](-). To the best of our knowledge, this is the first report of the isolation of a selenolate-protected gold cluster. [Au(25)(SeC(8)H(17))(18)](-) is an ideal compound for determining how changing the ligand from thiolate to selenolate affects the fundamental properties of a cluster.