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Enantioseparation of Au 20 (PP 3 ) 4 Cl 4 Clusters with Intrinsically Chiral Cores

Enantioseparation of Au 20 (PP 3 ) 4 Cl 4 Clusters with Intrinsically Chiral Cores

Yanfei Zhu, Hui Wang, Kaiwei Wan, Jun Guo, Chunting He, Yue Yu, Luyang Zhao, Yin Zhang, Jiawei Lv, Lin Shi, Renxi Jin, Xinxiang Zhang, Xinghua Shi, Zhiyong Tang

Angew Chem Int Ed Engl. 2018 Jul 16;57(29):9059-9063.

PMID: 29877009

Abstract:

Au20 (PP3 )4 Cl4 (PP3 =tris(2-(diphenylphosphino)ethyl) phosphine), abbreviated as Au20 , is the only Au nanocluster with an intrinsically chiral core without a chiral environment (chiral ligands or Au-thiolate staples), making it a unique object to understand chiral evolution and explore chiral applications. Unfortunately, the synthesized Au20 is racemic, and its enantiomers have not yet been separated. Herein, we report a supramolecular assembly strategy with α-cyclodextrin (α-CD) to afford enantiopure Au20 in bulk, and an enantiomer excess (ee) value of as-separated Au20 of 97 %. As a result of its high purity, the distinctive optical activity of Au20 , which originates from electronic transitions confined in chiral cores, is fully explored. Theoretical studies reveals that the enantioseparation results from the preferential self-assembly of α-CD with organic ligands on the surface of right-handed Au20 .

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR42410391	Pregnanediol-2,3,4,20,21-13C5			Price

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