Electron Spin Echo Envelope Modulation分光法を用いたバナジル錯体の研究

Nitrogen hyperfine and quadrupole couplings in oxovanadium (IV) porphyrin and Schiffbase complexes were investigated by using electron spin echo envelope modulation (ESEEM) spectroscopy. Hyperfine and quadrupole coupling parameters obtained from computer simulation are discussed in terms of electronic structure of nitrogen, spin population, and vanadium-nitrogen bond distance. It is worth noting that the parameter values are fairly invariable among nitrogens of the same type, which suggests possibility to predict the type of coordinating nitrogen from ESEEM measurements and will reduce the pain of computer simulation.