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Luminescence and Energy Transfer in Integrated Dye Assemblies

Research Project

Project/Area Number 06650945
Research Category

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

Allocation TypeSingle-year Grants
Research Field 工業物理化学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

YONEZAWA Yoshiro  Kyoto University Graduate School of Engineering Associate Professor, 工学研究科, 助教授 (10026346)

Co-Investigator(Kenkyū-buntansha) SATO Tomoo  Kyoto University Graduate School of Engineering Instructor, 工学研究科, 助手 (50205944)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsMolecular aggregate / Organic dye / Molecular exciton / Luminescence / Energy transfer / Mixed crystal / Random system / Fluorescence microscopy
Research Abstract

The J-aggregate of cyanine dyes, a sort of molecular clusters composed of 10-20 dye molecyles, is characterized by a sharp J-band and resonance fluorescence. In this study, we have fabricated integrated molecular assemblies incorporating two kinds of cyanine dyes in Langmuir-Blodgett (LB) films and polymer films. With an aid of spectro-scopic measurements, we have analyzed the structure and optical properties of novel dye assemblies. The cyanine dyes used in this work were 5,6,5', 6'-dibenzo-1,1'-diethyl-2,2'-cyanine chloride (dye I), 5,5'-dichloro-3,3'-diethyl-9-phenyl-thiacarbocyanine chloride (dye II), 3,3'-dimethyl-9-phenyl-4,5,4', 5'-naphthothiacarbocyanine chloride (dye III), 1,1'-diethyl-2,2'-cyanine chloride (dye IV), 1-methyl-1'-octadecyl-2,2'-cyanine perchlorate (S120), N,N'-dioctadecyl-oxacyanine perchlorate (S9), N,N'-dioctadecyl-thiacyanine perchlorate (S11). Integrated dye assemblies were classified into four types, separate (S) type, mosaic (M) type, persistence (HP) type and amalgamation (HA) type. We have carried out spectroscopic measurements and fluorescence microscopy observation by means of optical microscopes equipped with spectrophotometer and fluorometer, together with newly purchased Color-Chilled-CCD Camera and Color Monitor. It appeared that in LB films, dye I+dye II forms the S-aggregate, dye I+S120 and S9+S11 form the M- or HP-aggregate, while dye II+dye III gives rise to the HA-aggregate. In the polymer film, dye I+dye IV forms the S-aggregate. In the S-and M-aggregates, quenching and sensitization of resonance fluorescence due to excitation energy transfer were observed. Two conditions for realization of the HA-aggregate, steric requirement and electronic requirement, have been examined and a practical parameter THETA has been proposed.

Report

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

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 米澤義朗: "2種類のシアニン色素を含む単分子膜集合体の吸収・発光特性:混合J凝集体の形成" 日本写真学会誌. 58. 329-339 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Yoshiro Yonezawa: "Monolayer Assemblies Incorporating Two Types of Cyanine Dyes: Possibility of Formation of an Amalgamation-Type J-Aggregatre" Journal of Imaging Science & Technology. 39. 331-340 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Yonezawa, Yoshiro: "Luminescence Properties of Monolayr Assemblies Incorporating Two Kinds of Cyanine Dyes : Formation of Mixed J-Aggregate" J.Soc.Photogr.Sci.Technol.Japan. 58/4. 329-339 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Yonezawa, Yoshiro: "Monolayr Assemblies Incorporating Two Types of Cyanine Dyes : Possibility of Formation of an Amalgamation-Type J-Aggregate" J.Imaging Sci.& Technol.39/4. 331-340 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 米澤義朗: "2種類のシアニン色素を含む単分子膜集合体の吸収・発光特性:混合J凝集体の形成" 日本写真学会誌. 58. 329-339 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Yoshiro Yonezawa: "Monolayer Assemblies Incorporating Two Types of Cyanine Dyes: Possibility of Formation of an Amalgamation-Type J-Aggregatre" Journal of Imaging Science & Technology. 39. 331-340 (1995)

    • Related Report
      1995 Annual Research Report

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

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