摘要：

Molecular noble metal clusters are an emerging class of circularly polarized luminescent(CPL)nano-materials.Many of the ligand-protected metal clusters exhibit discrete electronic absorption bands,which are assigned to their structural components such as metal core,ligands and metal-ligand interfaces.This implies the suitability of the chiroptical spectroscopic approach to unravel the structure-chiroptical property relationships in molecular metal clusters.Due to the tremendous developments in computational methods for investigating chiroptical properties,along with circular dichroism(CD)and CPL spectroscopy,understanding of the structure-chiroptical properties of these clusters is rapidly progressing.This review discusses various strategies such as the use of chiral ligands,metal atom substitution,ligand exchange,co-crystallization with chiral ligands,etc.,for inducing and enhancing the CPL of such metal clusters.This review demonstrates the potential of combined CD-CPL spectroscopic investigations and theoretical calculations to unravel the origins of photoluminescence and CPL activity of chiral metal clusters.

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