Temperature dependent chiroptical response of sigmoidal gold clusters: probing the stability of chiral metal clusters.

ABSTRACT: The stability of chiral metal clusters is of great importance for their practical applications. Herein we select three structurally well-defined gold cluster compounds to probe how structural factors influence the stability of chiral metal clusters upon heating. Through monitoring the variation of CD, UV-vis and NMR spectra at elevated temperatures, the biased chiroptical response of three sigmoidal Au₆ clusters is finally ascribed to the synergistic effect of the distinct structural tunability of central diamino ligands, inter-cluster aurophilic interactions and steric hindrance. The rigid skeleton of chiral ligands and the strong metal-metal interaction effectively enhance the stability of asymmetric structural motifs in chiral metal clusters. In addition, some central diamino

SUBMITTER: Guo P 

PROVIDER: S-EPMC6048818 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature