On the structure of the thiolated Au15 cluster

Alfredo Tlahuice-Flores, Miguel Jose-Yacamán, Robert L. Whetten

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

The structure of the Au15-thiolate cluster has been elucidated using a DFT approach, and it is demonstrated to comprise a Au 4-tetrahedron core protected solely by the combination of two concatenated staple motifs. The longer motif efficiently wraps the core, and threads the shorter one. The structural assignment is supported by comparison to the powder X-ray diffraction pattern and, via time dependent-DFT calculations, to the optical and chiroptical (CD) absorption spectra. The calculated CD spectrum features a characteristic strong peak centered at 3.48 eV in accordance with the experimental profile. These results confirm the existence of long Au(i)-thiolate motifs as protecting units of small thiolated gold clusters with a thiolate-to-gold ratio comparable to the Au15(SR)13 cluster.

Original languageEnglish (US)
Pages (from-to)19557-19560
Number of pages4
JournalPhysical Chemistry Chemical Physics
Volume15
Issue number45
DOIs
StatePublished - Dec 7 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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