A cationic copper(i) iodide cluster MOF exhibiting unusual ligand assisted thermochromism

Abstract

BBy employing a tridentate thiophosphoramide ligand, [(NHAQ)3P[double bond, length as m-dash]S] (AQ = 3-quinolinyl), a cationic MOF, 1 {[Cu6I5(L1)2](OH)·3DMF·2.5MeOH}n, was synthesized. Photo-physical studies on the 2D-MOF 1 showed an unusual thermochromic behaviour emitting a blue fluorescence at 298 K due to the AQ chromophore and an orange-yellow phosphorescence at 77 K due to the [Cu6I5]+ unit.