Thermochromism and piezochromism of an atomically precise high-nuclearity silver sulfide nanocluster†
Abstract
A novel high-nuclearity silver sulfide nanocluster [Ag50S7(SC6H4F)36(dppp)6]·4DMI, (hereafter abbreviated as 1⋅4DMI) was synthesised. Solvent-free crystals of 1 displayed a completely reversible narrowing and broadening of the optical band gap that was accompanied by visual thermochromism and piezochromism changeovers, when stimulated by varying temperatures between 113 and 413 K or by changing the pressure from 1 atm to 7.5 GPa.