Aggregation-Induced Emission (AIE) in Ag-Au Bimetallic Nanocluster

Shan Jin; Wei Liu; Daqiao Hu; Xuejuan Zou; Xi Kang; Wenjun Du; Shuang Chen; Shiqiang Wei; Shuxin Wang; Manzhou Zhu

doi:10.1002/chem.201800189

Aggregation-Induced Emission (AIE) in Ag-Au Bimetallic Nanocluster

Chemistry. 2018 Mar 12;24(15):3712-3715. doi: 10.1002/chem.201800189. Epub 2018 Feb 23.

Authors

Shan Jin¹, Wei Liu², Daqiao Hu¹, Xuejuan Zou¹, Xi Kang¹, Wenjun Du¹, Shuang Chen¹, Shiqiang Wei², Shuxin Wang¹, Manzhou Zhu¹

Affiliations

¹ Department of Chemistry, Center for Atomic Engineering of, Advanced Materials, Anhui University, Hefei, Anhui, 230601, P.R. China.
² National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, P.R. China.

PMID: 29392775
DOI: 10.1002/chem.201800189

Abstract

Herein we report the synthesis and structure determination of a non-fluorescent Au₄ Ag₅ (dppm)₂ (SAdm)₆ (BPh₄ ) (dppm=bis(diphenylphosphino)methane and HSAdm=1-adamantane mercaptan) nanocluster in methanol with extremely strong AIE when aggregating to the solid state (i.e., film or crystal). This phenomenon was rarely reported in structural determined noble metal nanoclusters. The extended X-ray absorption fine structure (EXAFS) measurement ruled out the hypothesis that the luminescence originated from the structure change in different states. Besides, the crystal structure (determined by X-ray diffraction) revealed that the tightly combined left- and right-handed enantiomers induced the strong restriction of intramolecular motions (RIM), which may have an impact on aggregation-induced emission.

Keywords: aggregation-induced emission; alloys; atomic precision; luminescence; nanoclusters.