Photosalient effect and reversible photochromic photoluminescence driven by cascade [2+2] cycloaddition reaction and water adsorption in 0D hybrid metal halide

Notable photochromic photoluminescence and various photomechanical responses are driven by the cascade photoinduced [2 + 2] cycloaddition of LH+ and H 2 O sorption in zero-dimensional (LH) 2 InCl 5 .