title: The structure and optical properties of the [Au18(SR)14] nanocluster.
abstract: Decreasing the core size is one of the best ways to study the evolution from Au(I) complexes into Au nanoclusters. Toward this goal, we successfully synthesized the [Au18(SC6H11)14] nanocluster using the [Au18(SG)14] (SG=L-glutathione) nanocluster as the starting material to react with cyclohexylthiol, and determined the X-ray structure of the cyclohexylthiol-protected [Au18(C6H11S)14] nanocluster. The [Au18(SR)14] cluster has a Au9 bi-octahedral kernel (or inner core). This Au9 inner core is built by two octahedral Au6 cores sharing one triangular face. One transitional gold atom is found in the Au9 core, which can also be considered as part of the Au4(SR)5 staple motif. These findings offer new insight in terms of understanding the evolution from [Au(I)(SR)] complexes into Au nanoclusters.
authors.affiliation: Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui University, Hefei, Anhui, 230601 (P.R. China).
authors.forename: Shuang
authors.initials: S
authors.lastname: Chen
authors.forename: Shuxin
authors.initials: S
authors.lastname: Wang
authors.forename: Juan
authors.initials: J
authors.lastname: Zhong
authors.forename: Yongbo
authors.initials: Y
authors.lastname: Song
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Hongting
authors.initials: H
authors.lastname: Sheng
authors.forename: Yong
authors.initials: Y
authors.lastname: Pei
authors.forename: Manzhou
authors.initials: M
authors.lastname: Zhu
mesh_terms: D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D015394:Molecular Structure; D055095:Optics and Photonics
chemical_list: D006046:Gold
keywords: gold; nanoclusters; structure elucidation; sulfur ligands