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, C23H19N7, 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(BF4)(C5H5N)(C23H19N7)(H2O)]BF4, the triazole N atoms are in the syn–syn conformation. The coordination of the CuII 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 BF4-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.