2,6-Bis(1-benzyl-1H-1,2,3-triazol-4-yl)pyridine and its octahedral copper complex.

In the tridentate ligand 2,6-bis(1-benzyl-1H-1,2,3-triazol-4-yl)pyridine, C(23)H(19)N(7), both sets of triazole N atoms are anti with respect to the pyridine N atom, while in the copper complex aqua[2,6-bis(1-benzyl-1H-1,2,3-triazol-4-yl)pyridine](pyridine)(tetrafluoroborato)copper(II) tetrafluoroborate, [Cu(BF(4))(C(5)H(5)N)(C(23)H(19)N(7))(H(2)O)]BF(4), the triazole N atoms are in the syn-syn conformation. The coordination of the Cu(II) atom is distorted octahedral. The ligand structure is stabilized through intermolecular C-H...N interactions, while the crystal structure of the Cu complex is stabilized through water- and BF(4)-mediated hydrogen bonds. Photoluminiscence studies of the ligand and complex show that the ligand is fluorescent due to triazole-pyridine conjugation, but that the fluorescence is quenched on complexation.