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PHOTOINDUCED PHASE TRANSITION IN QUASI ONE-DIMENSIONAL ORGANIC CRYSTALS BY MEANS OF THE-RESOLVED RAMAN SCATTERING SPECTROSCOPY

Research Project

Project/Area Number 15340097
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics I
Research InstitutionOsaka University

Principal Investigator

TANIMURA Katsumi  Osaka University, The Institute of Scientific and Industrial Research, Professor, 産業科学研究所, 教授 (00135328)

Co-Investigator(Kenkyū-buntansha) ITOH Chihiro  Wakayama University, Dept.of system engineering, Associate professor, システム工学部, 助教授 (60211744)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥16,400,000 (Direct Cost: ¥16,400,000)
Fiscal Year 2004: ¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 2003: ¥11,100,000 (Direct Cost: ¥11,100,000)
KeywordsTime-resolved Raman spectroscopy / Femtosecond dynamics / Photoinduced Phase Transition / tetrathiafulvalen-p-chloranil / Polydiacetylene / Polymerization / quasi one-dimensional organic crystals / 光誘起構造変化 / TTF-CA / TCDU
Research Abstract

The purpose of this research project was to establish general understanding of the mechanism of photoinduced structural transformation in quasi one-dimensional organic crystals, based on the dynamics in ultra short temporal domain and on the direct information on structural properties. For this, femtosecond time-resolved optical methods and time-resolved Raman spectroscopic methods were extensively used.
For a charge-transfer organic crystal of tetrathiafulvalen-p-chloranil (TTF-CA), we could resolve completely the three consecutive primary steps involved in the transition ; the precursor-forming step, local proliferation, and N-phase order formation. The microscopic understanding in each step has been obtained by the results of multi-wavelength reflection measurements. For a process of forming a quasi one-dimensional conjugated it-bond order in diacetylene crystals, dynamics in forming the key entity of di-radical intermediatd in the polymerization reactions has been elucidated in 5,7-dodecadiyne-1,12-diol bis[phenyl carbamate] (TCDU) crystals : triplet-exciton fusion generates dimer diradicals. By applying Raman spectroscopy, we could obtain precise structural knowledge on each step of polymerization from diradicals to dicarben, origornaers and finally it-bond chains. The polydiacetylene crystals thus formed show both A and B phases, and relaxation dynamics in each phase have been studied by ferntosecond time-resolved reflection spectroscopy. Although photoinduced phase transition has not been induced in this poly TCDU, important process of forming intrinsic meta-stable states has been discovered.
The results obtained in the present project have provided the important basis on which we can construct the mechanism of photoinudced phase transition based on microscopic understanding of structural knowledge in each step involved in the process.

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (21 results)

All 2004 2003 Other

All Journal Article (15 results) Book (2 results) Publications (4 results)

  • [Journal Article] Role of two-hole localization in anion=vacancy formation on the (110) surfaces of InP and GaAs at the third regime of Langmuir evaporation2004

    • Author(s)
      K.Tanimura
    • Journal Title

      Phys. Rev. B 69

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Temperature-dependent yield of Frenkel pairs generated by valence excitation in NaCl,2004

    • Author(s)
      K.Tanimura, W.P.Hess
    • Journal Title

      Phys. Rev. B 69

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Photoinduced structural instability of the InP(110)-(1x1) surface,2004

    • Author(s)
      T.Gotoh, S.Kotake, K.Ishikawa, J.Kanasaki, K.Tanimura
    • Journal Title

      Phys. Rev. Left. 93

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Femtosecond time-resolved reflection spectroscopy of photoinduced ionic-to-neutral phase transition in tetrathiafulvzlen-p-choranil crystals,2004

    • Author(s)
      K.Tanimura
    • Journal Title

      Rhys. Rev. B 70

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Time-resolved spectroscopy of the dynamics of photoinduced ionic-to-neutral phase transition in tetrathiafulvalen-p-chloranil crystals2004

    • Author(s)
      K.Tanimura
    • Journal Title

      Photoinduced Phase Transitio(edited by K.Nasu)(World-Scientific, Singapore)

      Pages: 71-115

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Role of two-hole localization in anion-vacancy formation on the (110) surfaces of InP and GaAs at the third regime of Langmuir evaporation2004

    • Author(s)
      K.Tanimura
    • Journal Title

      Phys.Rev.B 69

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Temperature-dependent yield of Frenkel pairs generated by valence excitation in NaCl2004

    • Author(s)
      Katsumi Tanimura, Wayne P.Hess
    • Journal Title

      Phys.Rev.B 69

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Photoinduced structural instability of the InP(1l0)-(1x1) surface2004

    • Author(s)
      T.Gotoh, S Kotake, K.Ishikawa, J.Kanasaki, K.Tanimura
    • Journal Title

      Phys.Rev.Lett. 93

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Femtosecond time-resolved reflection spectroscopy of photoinduced ionic-to-neutral phase transition in tetrathiafulvalen-p-chloranil crystals2004

    • Author(s)
      Katsumi Tanimura
    • Journal Title

      Phys.Rev.B 70

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Femtosecond time-resolved reflection spectroscopy of photoinduced ionic-to-neutral phase transition in tetrahiafulvalence-p-chloranil crystals2004

    • Author(s)
      K.Tanimura
    • Journal Title

      Phys.Rev.B 70

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Photoinduced structural instability of the InP(110)-(1x1) surface2004

    • Author(s)
      T.Gotho, S.Kotake, K.Ishikawa, J.Kanasaki, K.Tanimura
    • Journal Title

      Phys.Rev.Lett. 93

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Excition self-trapping and formation of diradical intermediates in 5,7-dodecadiyne-1,12-diol bis[phenylcarbamate](TCDU)crystals at low temperatures2003

    • Author(s)
      C.Itoh, T.Kondoh, K.Tanimura
    • Journal Title

      J. Chem. Phys. 118

      Pages: 7572-7577

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Optical transitions of self-trapped holes in amorphous SiO_22003

    • Author(s)
      Y.Sasajima, K.Tanimura
    • Journal Title

      Phys. Rev. B 68

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Exciton self-trapping and formation of diradical intermediates in 5,7-dodecadiyne-1,12-diol bis[phenylcarbamate](TCDU) crystals at low temperatures2003

    • Author(s)
      C.Itoh, T.Kondoh, K.Tanimura
    • Journal Title

      J.Chem.Phys. 118

      Pages: 7572-7577

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Optical transitions of self-trapped holes in amorphous SiO_22003

    • Author(s)
      Y.Sasajima, K.Tanimura
    • Journal Title

      Phys.Rev.B 68

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Book] Photoinduced Phase Transsition (edited by K.Nasu) Chap,2 Time-resolved spectroscopy of the dynamics of photoinduced ionic-to-neutral phase transition in tetrathiaflulvalen-p-chloranil crystals,2004

    • Author(s)
      K.Tanimura
    • Total Pages
      44
    • Publisher
      World Scientific Publishing Co. (Singapore)
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Book] Photoinduced Phase Transitions2004

    • Author(s)
      K.Tanimura (edited by K.Nasu)
    • Publisher
      World Scientific, Singapore
    • Related Report
      2004 Annual Research Report
  • [Publications] C.Itoh, T.Kondoh, K.Tanimura: "Exciton self-trapping and formation of diradical intermediates in 5,7-dodecadiyne-1, 12-diol bis[phenylcarbamate](TCDU)crystals"J.Chem.Phys.. 118. 7572-7577 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Tanimura, W.P.Hess: "Temperature-dependent yield of Frenkel pairs generated by valence excitation in NaCl"Phys.Rev.B.. (in press).

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Tanimura: "Role of two-hole localization in anion-vacancy formation on the (110) surfaces of InP and GaAs at the third regime of Langmuir evapolation"Phys.Rev.B.. 68. 033301-1-033301-4 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Tanimura: "Femtosecond time-resolbved reflection spectroscopy of photinducedionic-to-neutral phase transition in tetrathiafulvalene-p-chloranil crystals"Phys.Rev.B.. (in press).

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2020-05-15  

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