Achievement of ligand-field induced thermochromic luminescence via two-step single-crystal to single-crystal transformations

A 1D chain manganese(ii) complex exhibits thermochromic luminescence from blue-green (502 nm) to red (617 nm) emission at 480 to 80 K, ascribed to the conversion of a tetrahedronal to trigonal bipyramidal ligand-field via two-step single-crystal to single-crystal transformations.