Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session B03: Supported Nano-Clusters II: Tuning Reactivity Through Cluster Size and Alloy Formation
11:15 AM–2:15 PM,
Monday, March 5, 2018
LACC Room: 150C
Sponsoring Unit: DCP
Chair: Phillip Christopher
Abstract: B03.00008 : Prolate-shaped Gold Cluster Series with Unique Optical Properties: Au6 as a New Building Unit
1:51 PM–2:03 PM
Subnano-sized gold clusters bearing ligands have been an attracting research topic, because they are expected to exhibit nuclearity- and structure-dependent physicochemical properties. During our systematic study on the gold clusters ligated with bidentate diphosphines, we found that a series of prolate-shaped Aun clusters (n = 6, 7, 8, 11) have a common Au6 unit, and exhibit the lowest-energy intense absorption bands in the visible region [1-3]. These bands, which have never been found in the absorption spectra of the conventional spherical gold clusters ligated with monophosphines, were all assigned to HOMO-LUMO intraband transitions. Furthermore, the correlation between the Au6-based structures and the HOMO-LUMO gaps was revealed from density functional theory calculation. In addition, optical tunabilities of these clusters were also demonstrated through ligand modifications around the gold cores [4,5].  J. Am. Chem. Soc. 136, 12892 (2014).  Chem. Commun. 48, 7559 (2012).  Angew. Chem. Int. Ed. 50, 7442 (2011).  Nat. Commun. 8, 576 (2017).  J. Phys. Chem. Lett. 7, 4267 (2016).
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