Vibrational and thermal studies of the complexes (NH4){[}VO(O-2)(2)(phen)]center dot 2H(2)O and (NH4){[}V(O-2)(3)(phen)]center dot 2H(2)O

The infrared spectra of the oxodiperoxo and triperoxo complexes, (NH4){[}VO(O-2)(2)(phen)]-2H(2)O and (NH4){[}V(O-2)(3)(phen)]-2H(2)O have been recorded and the observed bands are assigned on the basis of C, symmetry. Thermogravimetric (TG) and differential thermal analysis (DTA) measurements on these two complexes were also carried out. A detailed mechanism for the mode of thermal decomposition of the two complexes has been given and supported by infrared spectral measurements on the thermal decomposition products. The data obtained agree quite well with the expected structure and indicate that the final thermal decomposition product of these two complexes is V2O5. (c) 2005 Elsevier B.V. All rights reserved.