A hexa-{Mn~(II) -Schiff-base}-decorated cyclic polyoxovanadate as photocatalyst for dye degradation

摘要

A new organic-inorganic hybrid compound (NH4)2[{Mn(salen)(H2O)}6V6O_(18)](NO3)2-30H2O (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 hexanudear vanadates, which is unprecedentedly grafted by six [Mn(salen)(H2O)2] units. Such a new hybrid compound displays good UV photocatalytic activity for RhB degradation.