Raman-spectroscopic and differential scanning calorimetric studies of the light induced metastable states in K 2[RuCl 5NO

Abstract

In K 2[RuCl 5NO] light-induced long-living metastable states can be generated similar to those in Na 2[Fe(CN) 5NO] · 2H 2O and other nitrosylprussides revealing the decisive role of the NO ligand for the formation of the new states. With Raman spectroscopy intramolecular and lattice vibrations were investigated during the population process and in the state of saturation. Only the frequencies of the internal modes are shifted. The thermally induced decay was investigated by differential scanning calorimetry, yielding information about the decay temperature, the activation energy, the frequency factor and the order of reaction.