Luminescent monometallic Cu(i) triphenylphosphine complexes based on methylated 5-trifluoromethyl-3-(2′-pyridyl)-1,2,4-triazole ligands - New Journal of Chemistry (RSC Publishing)

Luminescent monometallic Cu(i) triphenylphosphine complexes based on methylated 5-trifluoromethyl-3-(2′-pyridyl)-1,2,4-triazole ligands - New Journal of Chemistry (RSC Publishing)

Jing-Lin Chen,*^ab Zong-Hao Guo,^a  Yan-Sheng Luo,^a Lu Qiu,^a Li-Hua He,^a Sui-Jun Liu,^a He-Rui Wen^a and  Jin-Yun Wang*^b  

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New J. Chem., 2016, Advance Article

DOI: 10.1039/C5NJ03529E



Received11 Dec 2015,
Accepted11 Apr 2016
First published online 11 Apr 2016
 

 

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 N₂P₂
distorted tetrahedral geometry and the methylated
5-trifluoromethyl-3-(2′-pyridyl)-1,2,4-triazole ligands display the
mono-anionic η²(N1,N2) and charge-neutral η²(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.