A Chained Iodocuprate(I) and its Photoluminescence Behavior

The simple solvothermal self-assemble of CuI, 1,4-bis(2-methyl-1H-imidazol-1-yl)butane (L1) and HI in a C 2 H 5 OH solvent at pH = 2 created a new H 2 (L1) 2+ -templated 1-D chained iodocuprate(I) [H 2 (L1)][Cu 3 I 5 ] 1 . The crystal data reveal that the Cu-I chain mode in 1 is rare. Two folded Cu 2 I 2 cores first aggregate into a trinuclear cluster by sharing an edge. Then the extra I − ions doublely bridge these trinuclear clusters into the title 1-D chain of 1 . Synchronously, a non-folded Cu 2 I 2 cluster is formed. In 1 , all of the Cu···Cu distances are smaller than 2.8 Å. The investigation on photoluminescence property indicates that with the decrease of the temperature, the photoluminescence emission for 1 exhibits a minor change from the green-yellow light (298 K) to yellow light (77 K). This means that 1 might possess the fluorescent thermochromic property.