Symmetry breaking of highly symmetrical nanoclusters for triggering highly optical activity  

作　　者：Xiao Wei Hao Li Honglei Shen Chuanjun Zhou Shuxin Wang Xi Kang Manzhou Zhu 

机构地区：[1]Department of Chemistry and Centre for Atomic Engineering of Advanced Materials,Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education,Institutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials.Anhui University,Hefei 230601,China

出　　处：《Fundamental Research》2024年第1期63-68,共6页自然科学基础研究（英文版）

基　　金：We acknowledge the financial support of the NSFC(21631001,21871001,and 22101001);the Ministry of Education,and the University Synergy Innovation Program of Anhui Province(GXXT-2020-053).

摘　　要：Developing new approaches to fulfill the enantioseparation of nanocluster racemates and construct cluster-based nanomaterials with optical activity remains highly desired in cluster science,because it is an essential prerequisite for fundamental research and extensive applications of these nanomaterials.We herein propose a strategy termed“active-site exposing and partly re-protecting”to trigger the symmetry breaking of highly symmetrical nanoclusters and to render cluster crystals optically active.The vertex PPh_(3)of the symmetrical Ag_(29)(SSR)_(12)(PPh_(3))_(4)(SSR=1,3-benzenedithiol)nanocluster was firstly dissociated in the presence of counterions with large steric hindrance,and then the exposed Ag active sites of the obtained Ag_(29)(SSR)_(12)nanocluster were partly re-protected by Ag^(+),yielding an Ag_(29)(SSR)_(12)-Ag_(2)nanocluster with a symmetry-breaking construction.Ag_(29)(SSR)_(12)-Ag_(2)followed a chiral crystallization mode,and its crystal displayed strong optical activity,derived from CD and CPL characterizations.Overall,this work presents a new approach(i.e.,active-site exposing and partly re-protecting)for the symmetry breaking of highly symmetrical nanoclusters,the enantioseparation of nanocluster racemates,and the achievement of highly optical activity.

关 键 词：Atomically precise nanocluster Symmetry breaking ENANTIOSEPARATION Circularly polarized luminescent Photoluminescence 

分 类 号：TB383[一般工业技术—材料科学与工程]