Accession Number : ADP008278

Title :   Iron-Free Cytochrome C and Myoglobin in Buffer Glass as Weakly-Coupling Mesoscopic Molecular System: Hole-Burning, Absorption and Fluorescence Spectra and their Temperature Properties,

Corporate Author : ELECTROTECHNICAL LAB SAKURA (JAPAN)

Personal Author(s) : Tani, Toshiro ; Sakakibara, Youichi ; Takahashi, Hisao ; Yamamoto, Kyonosuke

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Persistent spectral hole burning is a useful tool to detect zero-Phonon line and Phonon sideband of organic dye molecules doped in glasses and polymers, which are usually covered under Inhomogeneous broadening. These observation bring us information in on the electron-phonon interaction such as Debye-Waller factor a these molecular systems. From the viewpoint of the issue of materials designing for wavelength-multiplexed optical memory and also with naive interest to obtain efficient sharp holes, we have paid much attention to the molecular systems in the category of rather weaker inter/intra-molecular coupling. Basically the decrease of linear electron-phonon interaction brings us efficient zero-phonon hole formation and the decrease of the quadratic one does the sharpening of the hole. Using quinizarin derivatives and porphyrin family, we have been investigating various hole-forming dye-doped systems by modifying the molecular structure of dye as well as matrix. Glass matrices are surveyed from organic solvents through modified polymers to Inorganic sol-gel glasses. We have been trying to classify and comprehend the properties of holes. including spectral diffusion, as well as photoreaction processes of hole formation in relation to the local structure of materials.

Descriptors :   *MOLECULAR STRUCTURE, *HEMOGLOBIN, COUPLINGS, DIFFUSION, DYES, ELECTRONS, GELS, GLASS, INTERACTIONS, MATERIALS, MOLECULES, OBSERVATION, ORGANIC SOLVENTS, PHONONS, POLYMERS, SIDEBANDS, SOLVENTS, STRUCTURES, TOOLS, BUFFERS, ABSORPTION, FLUORESCENCE, SPECTRA, TEMPERATURE, IRON, DETECTION, DOPING, HOMOGENEITY, OPTICS, MEMORY DEVICES, FREQUENCY, MULTIPLEXING, INORGANIC MATERIALS, SPECTRA, MOLECULAR SPECTROSCOPY, CHROMOPROTEINS, PORPHYRINS.

Subject Categories : Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Biochemistry
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE