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Fractals and Excitation Transfer in Molecular Assemblies

Research Project

Project/Area Number 01470002
Research Category

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

Allocation TypeSingle-year Grants
Research Field 物理化学一般
Research InstitutionHokkaido University

Principal Investigator

YAMAZAKI Iwao  Hokkaido Univ., Fac. of Eng. Pro.,, 工学部, 教授 (80002111)

Co-Investigator(Kenkyū-buntansha) NISHIMURA Yoshinobu  Hokkaido Univ., Fac. of Eng. Inst.,, 工学部, 助手 (60218211)
TAMAI Naoto  Hokkaido Univ., Fac. of Eng. Inst.,, 工学部, 助手 (60163664)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 1990: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1989: ¥4,500,000 (Direct Cost: ¥4,500,000)
KeywordsFractal / Energy Transfer / Langmuir-Blodgett Films / Vesicle / Picosecond Laser
Research Abstract

Electronic excitation transfer has been studied with several kinds of molecular assemblies such as vesicles and Langmuir-Blodgett films with a view to establishment of the fractal structure in distribution of guest molecules. Dynamics of excitation transfer was investigated by means of a picosecond time-resolved fluorescence spectrophoto-meter. It was found that the fractal behaviors are essential among molecular assemblies in spatialdistribution of chromophores or in siteーenergy distribution, and that the morphology of molecular assembly frameworks affects the dynamics of energy relaxation processes. The fluorescence decays can be analyzed by an equation including a stretched exponential function. The mechanisms of singlet excitation energy relaxation were interpreted in terms of
(1) the energy trapping at acceptor sites under the fractal distribution with the fractal dimension of 1.3 -1.5, and
(2) the energy migration among energetically disordered monomer sites represented by ultrametric space (hierarchical energy distribution).
The diffusion length of the excitation energy transport was estimated from the dynamic stokes shift and the fluorescence decay curve.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] I.Yamazaki,N.Tamai,T.Yamazaki: "Electronic excitation transfer in organized molecular assemblies" J.Phys.Chem.94. 516-525 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] N.Tamai,T.Yamazaki,I.Yamazaki: "Picosecond dynamics of excitationーenergy relaxation of dye molecules in LanbmuirーBlodgett monolayers" Can.J.Physics. 68. 1013-1022 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] N.Boens,N.Tamai,I.Yamazaki,T.Yamazaki: "Picosecond single photon timing measurements with a proximity type microchannel plate photomultiplier and global analysis with reference convolution" Photochem.Photobiol.52. 911-917 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 山崎 巌,玉井 尚登: "光子計数法によるナノ・ピコ秒レ-ザ-蛍光分光" 高分子. 39. 374-379 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] N.Tamai,T.Yamazaki,I.Yamazaki: "Excitation energy relaxation of dye molecules in LangmuirーBlodgett monolayer films" Thin Solid Films. 179. 451-455 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] H.Nakahara,H.Uchimi,K.Fukuda,N.Tamai,I.Yamazaki: "JーAggregate formation of longーchain merocyanine dye in various mixed monolayers and its exciton behaviours in LangmuirーBlodgett films" Thin Solid Films. 179. 549-553 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 山崎 巌: "レ-ザ-分光計測の基礎と応用" 株式会社 アイピ-シ-, 250 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] I. Yamazaki, N. Tamai, T. Yamazaki,: "Electronic excitation transfer in organized molecular assemblies" J. Phys. Chem. 94.516-525 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] N. tamai, T. yamazaki, I. Yamazaki.: "Picosecond dynamics of excitation-energy relaxation of dye molecules in Lnabmuir-Blodgett monolayers" Can. J. Physics.68. 1013-1022 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] N. Bones, N. Tamai, I. Yamazaki, T. Yamazaki.: "Picosecond single photon timing measurements with a proximity type microchannel plata photomultiplier and global analysis with reference convolution" Photochem. Photobiol.52. 911-917 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] N.Tamai,T.Yamazaki,I.Yamazaki: "Picoseond dynamics of excitationーenergy relaxation of dye molecules in LangmuirーBlodgett monolayers" Can.J.Physics. 68. 1013-1022 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] I.Yamazaki,N.Tamai,T.Yamazaki: "Electronic Excitation Transfer in Organized Molecular Assemblies" J.Phys,Chem.94. 516-525 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] N.Boens,N.Tamai,I.Yamazaki,T.Yamazaki: "Picosecond single photon timing measurements with a proximity type microchannel plate photomultiplier and global analysis with reference conbolution" Photochem.Photobiol.52. 911-917 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 山崎 巌,玉井 尚登: "光子計数法によるナノ・ピコ秒レ-ザ-蛍光分光" 高分子. 39. 374-379 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] N.Tamai,T.Yamazaki,I.Yamazaki: "Excitation energy relaxation of dye molecules in LangmuirーBlodgett monolayar films" Thin Solid Films. 179. 451-455 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] H.Nakahara,H.Uchimi,K.Fukuda,N.Tamai,I.Yamazaki: "JーAggregate formation of longーchain merocyanine dye in various mixed monolayers and its exciton behaviours in LangmuirーBlodgett films" Thin Solid Films. 179. 549-553 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 山崎 巌: "レ-ザ-分光計測の基礎と応用" 株式会社 アイピ-シ-, 250 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] I.Yamazaki: "Electronic Excitation Transfer in Organized Molecular Assemblies" J.Phys.Chem. 94. 516-525 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] N.Tamai: "Picosecond Dynamics of Excitation Energy Relaxation of Dye Molecules in LB Monolayers" Can.J.Chem.

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Nishimura: "A Photon-Counting Streak Camera Applicability to the Single-Photon Timing Method" Ultrafast Phenomena VII. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Nishimura: "Sequential Excitation Energy Transfer in Langmuir-Blodgett Multilayers" Uttrafast Phenomena VII. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 山崎巌: "光子計数法によるナノ・ピコ秒レ-ザ-蛍光分光" 高分子. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 山崎巌: "レ-ザ-分光計測の基礎と応用" 株式会社アイピ-シ-, 250 (1990)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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