Synthesis,structure,and spectra studies of N,N-bis(4-(6-2,2'-bipyridine)-phenyl-methyl)-2-(aminomethyl)pyridine

Polydentate ligand N,N-bis(4-(6-(pyridine-2-yl)pyridin-2-yl)benzyl)(pyridin-2-yl)methanamine has been synthesized and characterized by MS,EA,and 1H NMR.Photophysical behaviors of the ligand were investigated by UV-Vis absorption and fluorescence spectrometry.Addition of HBF4 and zinc acetateto the solution of ligand all resulted in an obvious red-shift of fluorescence.Introduction of Cu 2+ to the methanol solution of ligand caused a progressive increasing of absorption intensity and agradual disappearing of emission bands,which indicated that Cu 2+ was a quencher of the excited-state fluorescence.Molar extinction coefficient and quantum yield were measured and calculated.The stable space configuration of the ligand was predicted by density functional theory calculations.