Synthesis, structure, characterization and photophysical properties of copper(i) complexes containing polypyridyl ligands

Abstract

Two novel photoluminescent copper(I) complexes having the compositions [Cu^I(L1)(PPh₃)₂]NO₃·3CHCl₃(1) and [Cu^I(L2)(PPh₃)₂]NO₃·H₂O(2) with PPh₃ = triphenylphosphine, L1 = cis-(±)-2-(2,5-di(pyridin-2-yl)-4,5-dihydro-1H-imidazol-4-yl)pyridine and L2 = 2,4,6-tris(2-pyridyl)triazine have been successfully synthesized and characterized by IR and ¹H-NMR spectroscopy, FAB⁺ mass spectrometry and single-crystal X-ray diffraction analysis. Both complexes showed interesting photophysical properties, which were studied experimentally in solution and in the solid state by UV-Vis and fluorescence spectroscopy and theoretically using TD-DFT calculations.