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MICROSCOPIC DYNAMICS OF PHOTOPRODUCED GEMINATE MOLECULES IN SOLVENT CAGE

Research Project

Project/Area Number 06453025
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Physical chemistry
Research InstitutionOsaka University

Principal Investigator

OKADA Tadashi  Osaka Univ., Fac.Engineering Science, Dept.Chemistry, Professor, 基礎工学部, 教授 (40029442)

Co-Investigator(Kenkyū-buntansha) HIRATA Yoshinori  Osaka Univ., Fac.Engineering Science, Dept.Chemistry, Associate Professor, 基礎工学部, 助教授 (90135674)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1995: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1994: ¥4,400,000 (Direct Cost: ¥4,400,000)
Keywordsgeminate dynamics / trnsient effect / reaction dynamics in solution / radical dimer / fluorescence up-conversion / aminophenyldisulfide / 蛍光減衰曲線 / 2分子反応速度
Research Abstract

1.Effects of Quencher Concentration on Bimolecular Reaction Rate in Solution
The time resolved fluorescence quenching reaction via intermolecular electron transfer for coumarin 151-N,N-dimethylaniline system in anisole has been studies in the broad range of quencher concentrations.The Smoluchowski sink term model was used to fit the experimental decay curves. The random walk method has been used to solve the diffusion equation under the initial conditions derived from the intermolecular portential between fluorescer and quencher. The importance of the "radical distribution function" instead of " random particle distribution" of the quencher molecules, for explanation of the quenching dynamics at earlier times and higher quencher concentrations, is emphasized.
2.Photodissociation and Geminate Dynamics of Aminophenydisulfide in Solution
Measuring picosecond time resolved absorption spectra, the photo-dissociation of p-aminophenyldisulfide and p-aminophenylthiol in various solvents has been investigated. In tens of picosecond delay times a decay of p-aminophenylthiyl radical ascribed to the geminate recombination was observed for p-aminophenyldisulfied in nonpolar solvents. In addition to a slight change in the spectral shape of thiyle radical, the rise of the broad absorption band, which should be assigned to the radical dimer, follows to the geminate recombination.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] Y. Hirata: "Photodissociation of p-aminophenyldisulfide and p-aminophenylthiol in liquid phase : geminate ercombination and the dimer formation of p-aminophenylthiyl" Chem. Phys. Lett.221. 283-288 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H. Chosrowjan: "Electron transfer quenching of S2 state fluorescence of Zn-tetraphenylporphyrin." Chem. Phys. Lett.242. 644-649 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y. Hirata: "Photodissociation and Geminate Dynamics in Solution Phase-Picosecond Transient Absorption Studies of Tetraphenylhydrazines and Diphenyl Disulfides" Res. Chem. Intermed.21. 823-836 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K. Nishiyama: "Solvation Dynamics of Dye molecules in Polar Solvents Studied by Time Resolved Hole Burning Spectroscopy" J. Mol. Liquids. 65/66. 41-48 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M. Kitazawa: "Solvent Viscosity Dependence of Bimolecular Reaction Rate Constant of the Excited 9-Cyanoanthracene Quenched by 1,3-Cyclohexadiene." J. Mol. Liquids. 65/66. 321-324 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y. Hirata: "Rotational relaxation of rod like molecules : diphenylacetylene in various solvents" J. Mol. Liquids. 65/66. 421-424 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T. Yabe: "Effects Quencher Soncentration on Bimolecullar Reaction Rate in Solution" J. Phys. Chem.(投稿中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Hirata: "Photophysical properties of diphenylacetylene derivatives in solution phase IV : N,N-dimethylanilino (phenyl) acetylene in nonpolar solvents" Chem. Phys. Lett.(投稿中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Hirata, Y.Niga and T.Okada: ""Photodissociation of p-aminophenyldisulfide and p-aminophenylthiol in liquid phase : geminate recombination and the dimer formation of p-aminophenylthiyl."" Chem.Phys.Lett.221. 283-288 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Chosrowjan, T.Okada, S.Taniguchi, S.Takagi, K.Tokumaru: ""Electron transfer quenching of S2 state fluorescence of Zn-tetraphenylporphyrin."" Chem.Phys.Lett.242. 644-649 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Hirata, Y.Niga, M.Ohta, M.Takizawa and T.Okada: ""Photodissociation and geminate dynamics in solution phase-Picosecond transient absorption studies of tetraphenylhydrazines and phenyldisulfies."" Res.Chem.Intermed.21. 823-836 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K.Nishiyama, Y.Asano, N.Hashimoto, and T.Okada: ""Solvation Dynamics of Dye molecules in Polar Solvents Studied by Time Resolved Hole Burning Spectroscopy."" J.Mol.Liquids. 65/66. 41-48 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Minoru Kitazawa, Tetsuro Yabe, Yoshinori Hirata, and Tadashi Okada: ""Solvent Viscosity Dependence of Bimolecular Reaction Rate Constant of the Excited 9-Cyanoanthracene Quenched by 1,3-Cyclohexadience."" J.Mol.Liquids. 65/66. 321-324 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Hirata, Y.Niga, M.Ohta, M.Takizawa and T.Okada: ""Photodissociation and Geminate Dynamics in Solution Phase-Picosecond Transient Absorption Studies of Tetraphenylhydrazines and Diphenyl Disulfides."" J.Mol.Liquids. 65/66. 421-424 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yabe, H.Chosrowjan, K,Yamada, Y.Hirata, and T.Okada: ""Effects of Quencher Concentration on Bimolecular Reaction Rate in Solution."" J.Phys.Chem.(submitted). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Hirata, T.Okada, and T.Nomoto: ""Photophysical properties of diphenylacetylene derivatives in solution phase IV : N,N-dimethylanilino (phenyl) acetylene in nonpolar solvents."" Chem.Phys, Lett.(submitted). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Hirata: "Rotational relaxation of rod like molecules : diphenylacetylene in various solvents" J.Mol.Liquids. 65/66. 421-424 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.Hirata: "Photodissociation and Geminate Dynamics in Solution Phase-Picosecond Transient Absorption Studies of Tetraphenylhydrazines and Diphenyl Disulfides" Res.Chem.Intermed.21. 823-836 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] M.Kitazawa: "Solvent Viscosity Dependence of Bimolecular Reaction Rete Constant of the Excited 9-Cyanoanthracene Quenched by 1,3-Cyclohexadiene" J.Mol.Liquids. 65/66. 321-324 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.Hirata: "Photodissociation of Aminophenyldisulfide and Aminophenylthiol in Liquid Phase:Geminate Reombination and Dimer Formation of p-Aminophenylthiyl" Chem.Phys,Lett.221. 283-288 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Hirata: "Photodissociation and Geminate Dynamics in Solution Phase-Picosecond Transient Absorption Studies of Tetraphenylhydrazines and Diphenyl Disulfides" J.Reaction Intermediates. (印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Kitazawa: "Geminate Recombination Dynamics Between Excited 9-Cyanoanthracene and 1,3-Cyclohexadiene Rroduced by Photodissociation of Their Cycloadduct" J.Mol.Liquids. (印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Hirata: "Rotational Relaxation of Rod Like Molecules:Diphenylacetylene in Various Soluents" J.Mol.Liquids. (印刷中). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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