Synthesis, characterization, luminescence properties of copper(I) bromide based coordination compounds

Two new copper bromide based coordination compounds 0D-Cu 2 Br 2 (3,5-dimethyl-pyridine) 4 ( 1 ) and 1D-Cu 2 Br 2 (5-bromo-pyrimidine) 2 ( 2 ) have been synthesized and structurally characterized. X-ray diffraction analyses reveal that the inorganic module of both compounds is Cu 2 Br 2 rhomboid dimer coordinated by the organic ligands. Compound 1 is a zero-dimensional (0D) molecular complex while compound 2 is one-dimensional (1D) extended structure. Photoluminescence measurement results show that 1 emits green photoluminescence peaked at 520 nm, with an IQY of 82.4%. Compound 2 emits red photoluminescence peaked at 630 nm, with an IQY of 2.1%. Both compounds exhibit potential as rare-earth metal free lighting phosphor alternatives.