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高分子鎖内光誘起超高速過程の解明

Research Project

Project/Area Number 20050018
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionOsaka University

Principal Investigator

藤塚 守  Osaka University, 産業科学研究所, 准教授 (40282040)

Project Period (FY) 2008 – 2009
Project Status Completed (Fiscal Year 2009)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2009: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2008: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywordsエネルギー移動 / 電荷移動 / 高分子 / オリゴマー / ペリレンジイミド / 電荷非局在 / シクロファン / 電荷共鳴 / エネルギーマイグレーション / ポリイソシアニド / オリゴチオフェン / オリゴシリレン / フェムト秒 / 偏光解消
Research Abstract

高分子鎖はランダムな配向および運動をする不均一複雑系であり、また、励起エネルギーや電荷のマイグレーション過程は極めて高速であることから、その素過程の解明には超高速分光法を用いた検討が不可欠である。本研究ではフェムト秒領域での高分子鎖内の電荷非局在過程、さらに構造変化を検討する。
1、枝分かれ状共役系高分子オリゴマーの励起状態における高速過程の検討
truxeneは3個のfluoreneが重なり合った構造であることから、これを用いることで二次元枝分かれ状oligofluoreneが合成可能である。本研究では、fruoreneをtruxeneおよび異性体であるisotruxeneに結合した枝分かれ状分子の励起状態での共役経路および構造変化を検討した。TFnでは励起直後から数十ピコ秒で構造変化に起因するピークシフトが確認された。このシフトはfluorene-fluorene間のplanarizationを示すものでn=1では観察されなかった。
2、スタックしたクロモフォアの電荷非局在過程の解明
二つのベンゼン環がアルキル鎖によりface-to-face構造に固定されたシクロファンの非局在電荷の安定化エネルギーは、ベンゼン環間距離に大きく依存する。今年度は、電子受容性分子であるbenzothiadiazole (BTD)のシクロファン分子について、分子内ダイマーラジカルアニオンの安定性の検討を行った。この分子はBTDの方向によりsynとantiの二つの異性体が存在する。これらを還元するとsynは1380nm、antiにおいては2640nmに分子内ダイマーラジカルアニオン生成に起因する電荷共鳴帯が確認された。synにおいて分子内ダイマーラジカルアニオンが著しく安定化されることが示された。

Report

(2 results)
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (28 results)

All 2010 2009 2008 Other

All Journal Article (17 results) (of which Peer Reviewed: 17 results) Presentation (10 results) Remarks (1 results)

  • [Journal Article] Solvent-polarity dependence of electron-transfer kinetics in a CdSe/ZnS quantum dot-pyromellitimide conjugate2010

    • Author(s)
      Shi-Cong Cui
    • Journal Title

      J.Phys.Chem.C 114

      Pages: 1217-1225

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthesis of a novel Sn(IV) porphycene-ferrocene triad-linked-by axial coordination and solvent polarity effect in photoinduced charge separation process2010

    • Author(s)
      Daisuke Maeda
    • Journal Title

      Inorg.Chem. 49

      Pages: 2872-2880

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intramolecular dimer radical anions of [3_n] cyclophanes : transannular distance dependent stabilization energy2009

    • Author(s)
      Mamoru Fujitsuka
    • Journal Title

      Chem.Commun.

      Pages: 1553-1555

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electron transfer in the supramolecular donor-acceptor dyad of zinc porphyicene2009

    • Author(s)
      Mamoru Fujitsuka
    • Journal Title

      J.Phys.Chem.A 113

      Pages: 3330-3335

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Emission from regioisomeric bis(phenylethynyl)benzenes during pulse radiolysis2009

    • Author(s)
      Shingo Samori
    • Journal Title

      J.Org.Chem. 74

      Pages: 3776-3782

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] "Signal-On" detection of DNA hole transfer at the single molecule level2009

    • Author(s)
      Tadao Takada
    • Journal Title

      J.Am.Chem.Soc. 131

      Pages: 6656-6657

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Emission mechanism of doubly ortho-linked quinoxaline/diphenylfluorene or cis-stilbene/fluorene hybrid compounds based on the transient absorption and emission measurements during pulse radiolysis2009

    • Author(s)
      Yi Wei
    • Journal Title

      J.Am.Chem.Soc. 131

      Pages: 6698-6707

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Important factors for the radiolysis-induced emission intensity of aromatic hydrocarbons2009

    • Author(s)
      Shingo Samori
    • Journal Title

      J.Photochem.Photobio.A.Chem. 205

      Pages: 179-185

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photochemical reactivity of gold clusters : Dependence on size and spinmultiplicity2009

    • Author(s)
      Masanori Sakamoto
    • Journal Title

      Langmuir 25

      Pages: 13888-13893

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] α-Bond dissociation of p-phenylbenzoyl derivatives in the higher tripl et excited state studied by two-color two-laser flash photolysis2009

    • Author(s)
      Minoru Yamaji
    • Journal Title

      J. Phys. Chem. A 113

      Pages: 1696-1703

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fine-tuning of radiolysis induced emission by variable substitution of donor-/acceptor-substituted tetrakis(arylethynyl)benzenes2008

    • Author(s)
      Shingo Samori
    • Journal Title

      J. Org. Chem 73

      Pages: 3551-3558

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intermolecular photoinduced electron-transfer of 1,8-naphthalimides inprotic polar solvents2008

    • Author(s)
      Dae Won Cho
    • Journal Title

      Phys. Chem. Chem. Phys 10

      Pages: 14393-4399

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intramolecular excimer formation and photoinduced electron-transfer process in bis-1,8-naphthalimide dyads depending on the linker length2008

    • Author(s)
      Dae Won Cho
    • Journal Title

      J. Phys. Chem. A 112

      Pages: 7208-7213

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two-laser-guided three-dimensional microfabrication and processing in a flexible polymer matrix2008

    • Author(s)
      Masanori Sakamoto
    • Journal Title

      Adv. Mater 20

      Pages: 13427-3432

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Excitation energy dependence of photoinduced processes in pentathiophene-perylene bisimide dyads with a flexible linker2008

    • Author(s)
      Mamoru Fujitsuka
    • Journal Title

      J. Phys. Chem. A 112

      Pages: 10193-10199

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photodecomposition profiles of β-bond cleavage of phenyiphenacyl derivatives in the higher triplet excited states during stepwise two-color two-laser flash photolysis2008

    • Author(s)
      Minoru Yamaji
    • Journal Title

      J. Phys. Chem. A 112

      Pages: 11306-11311

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Properties of excited radical cations of substituted oligothiophenes2008

    • Author(s)
      Shingo Samori
    • Journal Title

      J. Phys. Chem. A 112

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] 亜鉛ヘミポルフィセン超分子ドナーアクセプターダイアッド内電荷分離過程2010

    • Author(s)
      藤塚守
    • Organizer
      日本化学会第90春季年会
    • Place of Presentation
      近畿大学(大阪府)
    • Year and Date
      2010-03-27
    • Related Report
      2009 Annual Research Report
  • [Presentation] Electron Transfer in Supramolecular Donor-Acceptor Dyad of Zinc Porphycene2009

    • Author(s)
      Mamoru Fujitsuka
    • Organizer
      The 6^<th> Korea Japan Symposium on Frontier Photoscience
    • Place of Presentation
      Chungnam, Korea
    • Year and Date
      2009-10-31
    • Related Report
      2009 Annual Research Report
  • [Presentation] 亜鉛ポルフィセンを用いたドナー・アクセプター超分子の光誘起電子移動2009

    • Author(s)
      藤塚守
    • Organizer
      2009年光化学討論会
    • Place of Presentation
      桐生市市民文化会館(群馬県)
    • Year and Date
      2009-09-16
    • Related Report
      2009 Annual Research Report
  • [Presentation] Photoinduced Electron Transfer from S_2-Excited Porphyrin Derivatives2008

    • Author(s)
      Mamoru Fujitsuka
    • Organizer
      The 2008 Korea-Japan Symposium on Frontier Photoscience
    • Place of Presentation
      Jeju, Korea
    • Year and Date
      2008-09-27
    • Related Report
      2008 Annual Research Report
  • [Presentation] 2色2レーザーによるフレキシブル材料の三次元マイクロ加工2008

    • Author(s)
      坂本雅典
    • Organizer
      2008年光化学討論会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2008-09-13
    • Related Report
      2008 Annual Research Report
  • [Presentation] 連続アデニン配列におけるDNA内電荷分離機構2008

    • Author(s)
      川井清彦
    • Organizer
      2008年光化学討論会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2008-09-13
    • Related Report
      2008 Annual Research Report
  • [Presentation] ヨウ素ドープ酸化チタンの光触媒反応2008

    • Author(s)
      藤乗幸子
    • Organizer
      2008年光化学討論会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2008-09-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] ナフタルイミドーフェノチアジン結合分子の光誘起電荷移動過程2008

    • Author(s)
      藤塚守
    • Organizer
      2008年光化学討論会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2008-09-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] Eu3+ドープTiO2の単一粒子発光観察2008

    • Author(s)
      立川貴士
    • Organizer
      2008年光化学討論会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2008-09-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] ゾルゲルテンプレート法により合成した単一チタニアナノチューブにおける光触媒反応の単一分子観測2008

    • Author(s)
      内藤一也
    • Organizer
      2008年光化学討論会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2008-09-11
    • Related Report
      2008 Annual Research Report
  • [Remarks]

    • Related Report
      2009 Annual Research Report

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Published: 2008-04-01   Modified: 2018-03-28  

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