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Effects of electric field and magnetic field on photoinduced dynamics and the role of molecular orientation

Research Project

Project/Area Number 08454169
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical chemistry
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

OHTA Nobuhiro  Hokkaido Univ., Grad.School of Eng.Asso.Prof., 大学院・工学研究科, 助教授 (70113529)

Co-Investigator(Kenkyū-buntansha) YAMAZAKI Iwao  Hokkaido Univ., Grad.School of Eng., Prof, 大学院・工学研究科, 教授 (80002111)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 1997: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1996: ¥6,400,000 (Direct Cost: ¥6,400,000)
Keywordselectric field effect / magnetic field effect / photoinduced electron transfer / LB film / methylene-linked compound / exciplex fluorescence / excimer fluorescence / photocurrent / 励起分子 / 光化学反応 / 蛍光 / 電子移動 / 光導電性
Research Abstract

External electric firld effects on the initial step of the elctron transfer process, charge recombination process and charge dissociation process have been examined in various types of photoinduced electron transfer wtytem composed of donor and acceptor doped in a PMMA polymer film by measuring the elctric field effects on absorption and fluorescence spectra. The filed effect has been also examined in methylene-linked compounds of donor-acceptor system. As a result, the rate of the photoinduced electron transfer was found to be enhanced by an electric field. The charge recombination process as well as the charge dissociation process was also found to be affected by an electric field. In methylene-lined compounds of carbazole and terephthalic acid, further, the field-induced inhibition of the charge recombination was found to depend markedly on the methylene chain length.
Electron donor and acceptor layrs separated by a spacer layr were also prepared with a cyanine dye and viologen using the Langmuir-Blodgett technique, and the effect of an external electric field on the initial step of the photoinduced electron transfer has been examined on the basis of the measurements of the field effect on the fluorescence quantum yield of the cyanine dye. Interlayr electron transfer from the photoexcited molecules of cyanine dyes to viologen was found to be deptressed or enhanced by an external electric field, depending the direction of applied electric field.
Electric dipole moment and molecular polarizability of molecular intermediates produced by photochemical reaction such as an electron transfer have been evaluated from the electrofluorescence spectra of these transient species.
Besides the electron transfer process, other photochemical processes, e.g., excimer formation process of pyrene, were also found to be affected by an electric field.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report

Research Products

(36 results)

All Other

All Publications

  • [Publications] N.Ohta: "Magnetic field effects on fluorescence in isolated molecules with the intermediate level structure of singlet-triplet mixed states" J.Phys.Chem. 100. 7298-7316 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta: "External electric field effects on fluorescence in an electron donor and acceptor system:ethyl carbazole and dimethyl terephthalate in PMMA polymer films" J.Phys.Chem.100. 16466-16471 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohata: "External electric field effects on fluorescence of methylene-linked D-A systems in polymer films:(carbazole)-(CH_2)n-(terephthalic acid methyl ester)" J.Phys.Chem.100. 19295-19302 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta: "Rotational state dependence of the external magnetic field effect on the fluorescence of pyfimidine-d_4 at the S_1 origin" J.Phys.Chem.101. 452-458 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta: "External.electric field effect on photoinduced interlayer electron transfer in Langmuir-Blodgett films as revealed by the field effect on fluorescence:a D-A system of thiacyanine and viologen" J.Photochem.Photobiol.106. 37-43 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ito: "External electric field effect on interlayer vectorial electron transfer from photoexcited oxacarbocyanine to viologen in Langmuir-Blodgett films" Chem.Phys.Lett.277. 125-131 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Nishimura: "External electric field effects on the absorption and emission spectra of 9,9'-bianthryl in a PMMA polymer films" Asian J. Spectroscopy. 1. 141-148 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta: "An enhancement of excimer formation rate of pyrene by an external electric field in a PMMA polymer films" Chem.Phys.Lett.277. 215-222 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta: "External electric field effects on absorption and fluorescence spectra of monomer and dimer of oxacarbocyanine in Langmuir-Blodgett films" J.Phys.Chem.101. 10213-10220 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Umeuchi: "Electric field effects on absorption and fluorescence spectra of pyrene doped in a PMMA film" Thin Solid Flims. 311. 239-245 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta: "External electric field effect on photoinduced electron transfer from monomer and dimer of oxacarbocyanine in Langmuir-Blodgett films" Mol.Crys.Lig.Crys.(印刷中). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta: "Electric-field-induced quenching of exciplex fluorescence and photocurrent generation in a mixture of ethyl carbazole and dimethyl terephthalate doped in a PMMA polymer film" J.Phys.Chem.(印刷中). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta: "Magnetic field efffects on fluorescence in isolated molecules with the intermediate level structure of singlet-triplet mixed states" J.Phys.Chem.100. 7298-7316 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta, M.Koizumi, S.Umeuchi, Y.Nishimura and I.Yamazaki: "External electric field effects on fluorescence in an electron donor and acceptor system : ethyl carbazole and dimethyl terephthalate in PMMA polymer films" J.Phys.Chem.100. 16466-16471 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta, M.Koizumi, Y.Nishimura, I.Yamazaki, Y.Tanimoto, Y.Hatano, M.Yamamoto and H.Kono: "External electric field effects on fluorescence of methylene-linked D-A systems in polymer films : (carbazole)-(CH_2)n-(terephthalic acid methyl ester)" J.Phys.Chem.100. 19295-19302 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta, I.Yamazaki and H.Kono: "Rotational state dependence of the external magnetic field effect on the fluorescence of pyrimidine-d_4 at the S_1 origin" J.Phys.Chem. 101. 452-458 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta, T.Nomura and I.Yamazaki: "External electric field effect on photoinduced interlayr electron transfer in Langmuir-Blodgett films as revealed by the field effect on fluorescence : a D-A system of thiacyanine and viologen" J.Photochem.Photobiol. 106. 37-43 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ito, I.Yamazaki and N.Ohta: "External electric field effect on interlayr vectorial electron transfer from photoexcited oxacarbocyanine to viologen in Langmuir-Blodgett films" Chem.Phys.Lett.277. 125-131 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Nishimura, S.Okazaki, I.Yamazaki and N.Ohta: "External electric field effects on the absorption and emission spetra of 9,9'-bianthryl in a PMMA polymer films" Asian J.Spectrosc. 1. 125-131 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta, S.Umeuchi, T.Kanada, Y.Nishimura and I.Yamazaki: "An enhancement of excimer formation rate of pyrene by an external elecric field in a PMMA polymer films" Chem.Phys.Lett.277. 215-222 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta, T.Ito, S.Okazaki and I.Yamazaki: "External electric filed effects on absorption and fluorescence spectra of monomer and dimer of oxacarbocyanine in Langmuir-Blodgett films" J.Phys.Chem.101. 10213-10220 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Umeuchi, Y.Nishimura, I.Yamazaki, H.Murakami, M.Yamashita and N.Ohta.: "Electric field effects on abosorption and fluorescence spectra of pyrene doped in a PNNA film" Thin Solid Films. 311. 239-245 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta, T.Ito and I.Yamazaki: "External electric field effect on photoinduced electron transfer from monomer and dimer of oxacarbocyanine in Langumuir-Blodgett films" Mol.Crys.Liq.Crys.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta, S.Umeuchi, Y.Nishimura and I.Yamazaki: "Electric-field-induced quenching of exciplex fluorescence and photocurrent generation in a mixture of ethyl carbazole and dimethyl terephthalate doped in a PMMA polymer film" J.Phys.Chem.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Ohta: "External electric field effect on photoinduced interlayer electron transfer in Langmuir-Blodgett films as revealed by the field effect on fluorescence:a D-A system of thiacyanine and viologen" J.Photochem.Photobiol.,. 106. 37-43 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Ito: "External electric field effect on interlayer vectorial elactron transfer from photoexcited oxacarbocyanine to viologen in Langmuir-Blodgett films." Chem.Phys.Lett.,. 277. 125-131 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Ohta: "An Enhancement of Excimer Formation Rate of Pyrene by an External Electric Field in a PMMA Polymer Films." Chem.Phys.Lett.,. 277. 215-222 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Ohta: "External electric field effects on absorption and fluorescence spectra of monomer and dimer of oxacarbocyanine in langmuir-Blodgett films" J.Phys.Chem.,. 101. 10213-10220 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] S.Umeuchi: "Electric field effects on absorption and fluorescence spectra of pyrene doped in a PMMA film" Thin Solid Films. 311. 239-245 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Ohta: "External Electric Field Effect on Photoinduced Electron Transfer from Monomer and Dimer of Oxacarbocyanine in Langmuir-Blodgett Films" Mol.Crys.Lig.Crys.(印刷中). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Ohta: "Magnetic field effects on fluorescence in isolated molecules with the intermediate level structure of singlet-triplet mixed states" J.phys.chem.100. 7298-7316 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Abe: "Dimer formation of naphthalene in Langmuir-Blodgett Monolayer films probed by time-resolved fluorescence spectroscopy" Chem.Lett.479-480 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] N.Ohta: "External electric field effects on fluorescenece in an electron donor and acceptor system : ethyl carbazole and dimethyl terephthalate in PMMA polymer films" J.phys.chem.100. 16466-16471 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] N.Ohta: "External electric field effects on fluorescenece of methylene-linked D-A systems in polymer films :(carbazole)-(CH_2) n-(terephthalic acid methyl ester)" J.phys.chem.100. 19295-19302 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] N.Ohta: "Rotational state dependence of the external magnetic field effect on the fluorescence of pyrimidine-d_4 at the S_1 origin" J.phys.chem.101. 452-458 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] N.Ohta: "External electric field effect on photoinduced interlayer electron transfer in Langmuir-Blodgett films as revealed by the field effect on fluorescenece : a D-A system of thiacyanine and viologen" J.Photochem.Photobiol.(印刷中). (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-03-31   Modified: 2016-04-21  

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