Accession Number : ADP008281

Title :   Persistent Hole Burning Spectroscopy Applications on Phthalocyanine Langmuir-Blodgett Films,

Corporate Author : CHARLES UNIV PRAGUE (CZECHOSLOVAKIA) FACULTY OF MATHEMATICS AND PHYSICS

Personal Author(s) : Adamec, F. ; Ambroz, M. ; Brynda, E. ; Dian, J. ; Vacha, M.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Phthalocyanine Langmuir Blodgett (LB) films represent ultra thin monomolecular layers with molecules in tight contact. Most of the phthalocyanine molecules in LB films are ordered in domains where they occupy well defined (parallel) positions. There is also a minority of non-ordered molecules in off-domain positions in LB films. This fact is well documented in X-ray diffraction and transmission electron diffraction. Moreover, significant inhomogeneous broadening of absorption spectra of LB film has been observed, in comparison with absorption spectra of isolated molecules. On the other hand the observed fluorescence is very weak, nevertheless its spectral profile well corresponds to that of isolated molecules. This phenomenon can be well explained on the basis of strong aggregation and/or fast excited energy transfer (EET).

Descriptors :   *FILMS, *PHTHALOCYANINES, *SPECTROSCOPY, ABSORPTION, ABSORPTION SPECTRA, COMPARISON, DIFFRACTION, ELECTRON DIFFRACTION, ELECTRONS, ENERGY, ENERGY TRANSFER, FLUORESCENCE, HANDS, LAYERS, MOLECULES, PROFILES, SPECTRA, TRANSFER, X RAY DIFFRACTION, X RAYS, MOLECULAR STRUCTURE, HOMOGENEITY, EXCITATION, PORPHYRINS, MOLECULAR SPECTROSCOPY.

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Physical Chemistry
      Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE