α-Hydroxyalkynyl-protected copper( i ) acetelyenediide nanoclusters with anion-dependent photoluminescence

anions in Cu17 is responsible for such significantly enhanced photoluminescence, as confirmed by theoretical calculations. This work demonstrates a mixed inner-outer and hetero-multidentate-ligand strategy for synergistically stabilising metal nanoclusters and generating intense photoluminescence, and α-hydroxyalkynes are highly applicable in achieving alkynyl-protected metal acetelyenediide clusters in a two birds, one stone manner.