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Studies on Conduction Mechanisms for Alternating Polymers Composed of Organosilicon and π-Electron Units and Application to Functionality Materials

Research Project

Project/Area Number 12555245
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 工業物理化学
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

KUNAI Atsutaka  Hiroshima University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (90029190)

Co-Investigator(Kenkyū-buntansha) HARIMA Yutaka  Hiroshima University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (20156524)
OHSHITA Joji  Kyushu University, Institute for Fundamental Research of Organic Chemistry, Associate Professor, 有機化学基礎研究センター, 助教授 (90201376)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥10,100,000 (Direct Cost: ¥10,100,000)
Fiscal Year 2002: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2001: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2000: ¥7,500,000 (Direct Cost: ¥7,500,000)
Keywordssilicon polymer / oligothienylene / oligosilanylene / conduction mechanism / carrier mobility / polaron / π-dimer / electroluminescent device / σ-π共役 / ポリマー合成 / 伝導機構
Research Abstract

The main interest of this research is placed on clarification of conduction mechanisms for polymers with alternating arrangement of an organosilicon unit and π-electron system in the main chain and also on utilization of the polymers as functionality materials. In these viewpoints, polymers with the monosilanylene (MS), disilanylene (DS), or trisilanylene (TS) unit and oligothiophene π-system (mT), and the related polymers moreover, were synthesized. The alternating Si-mT polymers exhibited a 10^<-4> - 10^<-1> S/cm level of conductivity on doping with FeCl_3 vapor, and MS-5T was found to be highly stable upon electrochemical dopirig/dedoping. These polymers exhibited excellent current-luminance characteristics as the hole-transporting materials of EL devices.
The following points have been investigated by using MS-mT: (1) the role of polaron, bipolaron, and π-dimer in conduction mechanism; (2) dominating path between intrachain and interchain paths; (3) reason for the evolution of metallic conduction. It is concluded that in the lightly doped state, interchain hopping is the main path for carrier transport, and π-dimers concern in these polymers.
Polyhexylthiophenes (PHT) with different regioregularity of 97%, 81%, 70%, and 54% were also prepared. In order to clarify influences of stacking of polymer chains on the transport properties of conducting polymers, the mobilities of charge carriers in the films of these PHTs were electrochemically and spectroscopically evaluated as the function of doping level. The results clearly show that (1) better ordered stacking structures enhance mobilities but affect little features of the mobility change by doping; (2) the interchain hopping transport of polarons is a dominating path of the electrical conduction in the ightly doped polymer; (3) stacking of thiophene planes is not associated with the evolution of metallic induction, although it greatly affects mobility of charge carriers.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report

Research Products

(48 results)

All Other

All Publications (48 results)

  • [Publications] J.Ohshita: "Synthesis and Properties of Alternating Polymers Containing 2,6-Diaryldithienosilole and Organosilicon Units"Macromol. Chem. Phys.. 201. 851-857 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Harima: "Transport and in situ ESR Studies on Polymer Film Composed of Quinquethiophenes Bridged by Monosilanylene Units"Synthetic Metals. 113. 173-183 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Tang: "Optical Study on Electrochemical and Chemical Doping of Polymers of Oligothienyls Bridged by Monosilyl"Electrochimica Acta. 45. 2771-2780 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] L.Zhu: "Electrochemical Oxidation of Thienylene-Silanylene Copolymer Films in Different Electrolyte Solutions"Electrochimica Acta. 45. 2203-2210 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Ohshita: "Effects of the Ethoxy and Diethylamino Substituent on the Electrochemical and Conducting Properties of Poly[(silanylene)oligothienylenes]"J. Organomet. Chem.. 611. 537-542 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Ohshita: "Synthesis of Polymers with Alternating Organosilanylene and Oligothienylene Units and Their Optical, Conducting and Hole-Transporting Properties"Organometallics. 19. 4492-4498 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Ohshita: "Synthesis of Polymers Composed of Alternating Diphenylenedithienosilole and Diethynylenesilylene Units and Their Application to Hole-Transport in Double Layer EL Devices"Macromolecules. 33. 8890-8893 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] L.Zhu: "Electrochemical Properties of Oligothienylene-Oligosilanylene Block Copolymers : Influence of Block Sizes"J. Appl. Electrochem.. 31. 175-180 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Sakamaki: "Synthesis and Properties of σ-π Conjugated Alternating Polymers Consisting of Carbazole and Organosilicon Units"Appl. Organomet. Chem.. 15. 604-612 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Ohshita: "Effects of Conjugated Substituents on the Optical, Electrochemical, and Electron-Transporting Properties of Dithienosiloles"Organometallics. 20. 4800-4805 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Sakamaki: "Synthesis and Properties of Novel σ-π Alternating Polymers with Triphenylamine and Organosilicon Units"Appl. Organomet. Chem.. 15. 939-946 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Ohshita: "Synthesis of Novel Bithiophene Derivatives with an Organosilanylene Bridge, and Their Application to Electron-Transporting Materials in EL Devices"J. Organomet. Chem.. 642. 137-142 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Jiang: "Doping-Induced Change of Carrier Mobilities in Poly(3-hexylthiophene) Films with Different Stacking Structures"Chem. Phys. Lett.. 364. 616-620 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Jiang: "A Transport Study of Poly(3-hexylthiophene) Films with Different Regioregularities"Synthetic Metals. 135-136. 351-352 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kunai: "Synthesis and Properties of Silicon-Bridged Bithiophenes and Application to EL Devices"Synthetic Metals. 137. 1007-1008 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Ohshita: "Synthesis of Organosilanylene-Pentathienylene Alternating Polymers and Their Application to the Hole-Transporting Materials in Double-Layer Electroluminescent Devices"J. Organomet. Chem.. 665. 29-32 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Ohshita: "Hole-Transporting Properties of Organosilanylene-Diethynylpyrene and Diethynylanthracene Alternating Polymers. Application to Patterning of Light-Emitting Images"J. Organomet. Chem.. (印刷中). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Ohshita: "Synthesis and Properties of Alternating Polymers Containing 2,6-Diaryldithienosilole and Organosilicon Units"Macromol. Chem. Phys.. 201. 851-857 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y. Harima: "Transport and in situ ESR Studies on Polymer Film Composed of Quinquethiophenes Bridged by Monosilanylene Units"Synthetic Metals. 113. 173-183 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Tang: "Optical Study on Electrochemical and Chemical Doping of Polymers of Oligothienyls Bridged by Monosilyl"Electrochimica Acta. 45. 2771-2780 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] L. Zhu: "Electrochemical Oxidation of Thienylene-Silanylene Copolymer Films in Different Electrolyte Solutions"Electrochimica Acta. 45. 2203-2210 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Ohshita: "Effects of the Ethoxy and Diethylamino Substituent on the Electrochemical and Conducting Properties of Poly[(silanylene)oligothienylenes]"J. Organomet. Chem.. 611. 537-542 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Ohshita: "Synthesis of Polymers with Alternating Organosilanylene and Oligothienylene Units and Their Optical, Conducting and Hole-Transporting Properties"Organoraetallics. 19. 4492-4498 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Ohshita: "Synthesis of Polymers Composed of Alternating Diphenylenedithienosilole and Diethynylene-silylene Units and Their Application to Hole-Transport in Double Layer EL Devices"Macromolecules. 33. 8890-8893 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] L. Zhu: "Electrochemical Properties of Oligothienylene-Oligosilanylene Block Copolyraers: Influence of Block Sizes"J. Appl. Electrochem.. 31. 175-180 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Sakamaki: "Synthesis and Properties of σ-π Conjugated Alternating Polymers Consisting of Carbazole and Organosilicon Units"Appl. Organoraet. Chem.. 15. 604-612 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Ohshita: "Effects of Conjugated Substituents on the Optical, Electrochemical, and Electron-Transporting Properties of Dithienosiloles"Organoraetallics. 20. 4800-4805 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Sakamaki: "Synthesis and Properties of Novel σ-π Alternating Polymers with Triphenylamine and Organosilicon Units"Appl. Organomet. Chem.. 15. 939-946 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Ohshita: "Synthesis of Novel Bithiophene Derivatives with an Orgenosilanylene Bridge, and Their Application to Electron-Transporting Materials in EL Devices"J. Organome., Chem.. 642. 137-142 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X. Jiang: "Doping-Induced Change of Carrier Mobilities in Poly (3-hexylthiophene) Films with Different Stacking Structures"Chem. Phys. Lett.. 364. 616-620 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X. Jiang: "A Transport Study of Poly(3-hexylthiophene) Films with Different Regioregularities"Synthetic Metals. 135-136. 351-352 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A. Kunai: "Synthesis and Properties of Silicon-Bridged Bithiophenes and Application to EL Devices"Synthetic Metals. 137. 1007-1008 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Ohshita: "Synthesis of Organosilanylene-Pentathienylene Alternating Polymers and Their Application to the Hole-Transporting Materials in Double-Layer Electroluminescent Devices"J. Organomet. Chem.. 665. 29-32 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Ohshita: "Hole-Transporting Properties of Organo-silanylene-Diethynylpyrene and Diethynylanthracene Alternating Polymers. Application to Patterning of Light-Emitting Images"J. Organomet. Chem. (in press). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Jiang: "Doping-Induced Change of Carrier Mobilities in Poly(3-hexylthiophene) Films with Different Stacking Structures"Chem. Phys. Lett.. Vol.364. 616-620 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Joji Ohshita: "Synthesis of Organosilanylene-Pentathienylene Alternating Polymers and Their Application to the Hole-Transporting Materials in Double-Layer"J. Organomet. Chem.. Vol.665. 29-32 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] X.Jiang: "A Transport Study of Poly(3-hexylthiophene) Films with Different Regioregularity"Synthetic Metals. (印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Koichi Sakamaki: "Synthesis and Properties of σ-π Conjugated Alternating Polymers Consisting of Carbazole and Organosilicon Units"Appl.Organomet.Chem.. vol.15. 604-612 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Koichi Sakamaki: "Synthesis and Properties of Novel σ-π Alternating Polymers with Triphenylamine and Organosilicon Units"Appl.Organomet.Chem.. vol.15. 939-946 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Lihua Zhu: "Electrochemical properties of oligotheienylene-oligosilanylene block copolymers : Influences of block sizes"J.Appl.Electrochem.. vol.31. 175-180 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yoshihito Kunugi: "A mobility study on highly stacked conducting polymer films"Synthetic Metals. Vol.119. 433-434 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] XQ.Jiang: "Mobilities of charge carriers hopping between π-conjugated polymer chains"J.Mater.Chem.. vol.11. 3043-3048 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Lihua Zhu: "Electrochemical oxidation of thienylene-silanylene copolymer films in different electrolyte solutions"Electrochim.Acta. 45. 2203-2210 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hequing Tang: "Optical study on electrochemical and chemical doping of polymers of oligothienyls bridged by monosilyl"Electrochim.Acta. 45. 2771-2780 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yutaka Harima: "Transport and in situ ESR studies on polymer film composed of quinquethiophenes bridged by monosilanylnene units"Synthetic Metals. 113. 173-183 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Joji Ohshita: "Effects of the ethoxy and diethylamino substituent on the electrochemical and conducting properties of poly [(silanylene) oligothienylenes]"J.Organomet.Chem.. 611. 537-542 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Joji Ohshita: "Synthesis of polymers with alternating organosilanylene and oligothienylene units and their optical, conducting, and hole-transporting properties"Organometallics. 19. 4492-4498 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Lihua Zhu: "Electrochemical properties of copolymers consisting of oligothiophene-oligosilylene block copolymers : Influences of block sizes"J.Appl.Electrochem.. 31. 175-180 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-03-31   Modified: 2016-04-21  

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