NEXAFS study of Zinc porphyrins intercalated into V2O5 xerogel

Abstract

For the first time the NEXAFS N1s- and C1s- spectra of composites on the basis of macrocyclic molecules - zinc meso-tetrakis(4-pyridyl)porphyrin, zinc meso-tetrakis(N-methylpyridinium-4-yl)porphyrin tetraiodide and V2O5·nH2O xerogel were studied by a total electron yield method with using synchrotron radiation of Russian-Germany beamline at BESSY-II. These intercalation complexes are insoluble in water, stable and exhibit good electrochemical properties. The host-guest interaction leads to the great changes of NEXAFS N1s- and C1s-spectra of the synthesized composites as compared with pristine compounds spectra. The studies show the 2.1 eV blue shift energy position and great increase oscillator strength of the π-resonance in the NEXAFS N1s- spectra of pyridine cycle when ZnPor(Py)4 intercalated into V2O5·nH2O xerogel. © ISUCT Publishing.