Mixed-ligand europium complexes with toluic acid

Europium complexes with toluic acid having the composition Eu(Tol)(3) . nD . xH(2)O, where Tol(-) is the meta-toluate anion, D is 1,10-phenanthroline (n = 2, x = 1), 2,2 ' -dipyridyl, piperidine, diphenylguanidine, triphenylp hosphine oxide (n = 1, x = 2), and H2O (n = 0, x = 2), were synthesized. Th e spectroscopic and luminescence properties of these complexes were studied . The title compounds are thermally stable up to 270 degreesC. According to IR spectroscopy, two modes of coordination of the toluate anion, i.e., mon odentate and bidentate coordination, can be found in europium toluates.