NEXAFS Study of Zinc Porphyrins Intercalated into V2O5 Xerogel

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 center dot nH(2)O 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 p-resonance in the NEXAFS N1s-spectra of pyridine cycle when ZnPor(Py) 4 intercalated into V2O5 center dot nH(2)O xerogel.