A hexa-{MnIII-Schiff-base}-decorated cyclic polyoxovanadate as photocatalyst for dye degradation

A new organic-inorganic hybrid compound (NH4)(2)[(Mn(salen)(H2O)}(6)V6O18](NO3)(2)center dot 30H(2)O (salen(2-) = N,N'- (ethylene)bis(salicylideneiminate)) (1) was synthesized by the reaction between NH4VO3 and [Mn(salen)(H2O)(2)]ClO4 in a methanol-water solution with pH = 5.0 adjusted by nitric acid. Compound 1 was characterized by elemental analyses, TG, IR, UV-vis, XPS and the single-crystal X-ray diffraction. Compound 1 possesses a discrete cyclic hexanuclear vanadates, which is unprecedentedly grafted by six iMn(salen)(H2O)(2)] units. Such a new hybrid compound displays good UV photocatalytic activity for RhB degradation. (C) 2012 Elsevier B.V. All rights reserved.