Luminescent monometallic Cu(i) triphenylphosphine complexes based on methylated 5-trifluoromethyl-3-(2′-pyridyl)-1, 2, 4-triazole ligands. (25th April 2016) - Chen, Jing-Lin
Abstract : The photoluminescence properties of Cu(i ) complexes can be markedly improved by the N–H deprotonation of the 1, 2, 4-triazolyl ring. Abstract : A new family of five new mononuclear Cu(i ) triphenylphosphine complexes derived from methylated 5-trifluoromethyl-3-(2′-pyridyl)-1, 2, 4-triazole ligands has been synthesized and well characterized. They all show an N2 P2 distorted tetrahedral geometry and the methylated 5-trifluoromethyl-3-(2′-pyridyl)-1, 2, 4-triazole ligands display the mono-anionic η 2 (N1, N2) and charge-neutral η 2 (N1, N4) chelating coordination modes, along with the 1, 2, 4-triazolyl ring inversion induced by the NH ↔ N − transformation. These Cu(i ) complexes are all emissive in solution and solid states at ambient temperature, which can be well modulated by changing the methyl position on the pyridyl ring and regulating the NH ↔ N − conversion of the 1, 2, 4-triazolyl ring. It is also shown that the deprotonation of 1, 2, 4-triazolyl-NH can markedly improve the luminescence properties of Cu(i ) complexes.