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Femtosecond Dynamics and Phase Relaxation of Electron Transfer Reaction in Double Metal Complex Crystals

Research Project

Project/Area Number 09640605
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical chemistry
Research InstitutionOsaka University

Principal Investigator

IKEDA Noriaki  Osaka University Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (70176098)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsFemtosecond / Electron Transfer / Double Metal Complex / Crystal / Energy Transfer / Cavity-Dumper / ルテニウム錯体
Research Abstract

For the tilted study, a femtosecond cavity-dumped Ti : Sapphire laser has been constructed for the first time in Japan. We have succeeded to increase a pulse energy to 10 times (35 fs, 20 nJ/pulse) with variable repetition rates(10 kHz-76 MHz) in a diffraction efficiency (40-60%). Although we have tried to measure phase relaxation signals in pump-probe measurements of double metal complex crystals and thin crystal films of photo-conducting materials such as oxotitanylphthalocyanine, we could not succeed yet to get any information of phase relaxation in pump-probe measurements at this moment. This is due to a bad s/n ratio in pump-probe measurement of present our system and some thermal problems in neat crystals. We are trying to apply this method to diluted solid systems.
Energy transfer reactions in guest-doped crystals have also been investigated by means of time-correlated photon-counting consists of this laser system. In the case of highly doped Os^<2+> : [Ru(bpy)_3](PF_6)_2 crystal, the host emission decay of ^3CT(Ru) was non-exponential. The decay is ascribed to the various rate constants of energy transfer depending on the excited host-guest distances, which are changed as a result of excitation migration through the host molecules. By a stochastic simulation, rates are determined to be 1.2 x 10^<10> s^<-1> for the closest Os(II) and 3 x 10^8 s^<-1> for the excitation migration to the closest Ru(II). The mechanism of energy migration and transfer in the closest condition of metal centers are ascribed to electron exchange interaction.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] A.Islam et al.: "Dual^3(d-d)Emission of[RhL_2Cl_2](PF_6)(L=2,2'-bipyridine and 1,10-phenanthroline)in a crystal in the temperature range of 77-536 K." J.Photochem.Photobiol.A : Chem.106・1-3. 61-66 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Islam et al.: "Nonradiative Transition of Phosphorescent Charge-Transfer States of Ruthenium(II)-to-2,2'-Biquinoline and Ruthenium(II)-to-2,2' : 6',2"-Terpyridine in the Solid." Inorg.Chem.37・12. 3093-3098 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Islam et al.: "Non-radiative Processes of Excited CT States of Ru(II)and Pt(II)Compounds and Excited d-d States of Rh(III)Compounds in the Solid State and at Higher Tempera" Coord.Chem.Rev.171. 353-363 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Islam et al.: "A Displaced and Low-frequency Vibration of Phosphorescent State of trans-[Rh(ethylenediamine)_2Cl_2]PF_6 in a Range of 5-497 K." J.Chem.Phys.109・12. 4900-4910 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Islam et al.: "Dual ^3(d-d) Emission of [RhL_2Cl_2](PF_6) (L=2,2'-bipyridine and 1,10-phenanthroline) in a crystal in the temperature range of 77-536 K." J.Photochem.Photobiol.A : Chem.106(1-3). 61-66 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Islam et al.: "Nonradiative Transition of Phosphorescent Charge-Transfer States of Ruthenium(II)-to-2,2'-Biquinoline and Ruthenium(II)-to-2,2' : 6', 2"-Terpyridine in the Solid." Inorg.Chem.37(12). 3096-3098 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Islam et al.: "Non-radiative Processes of Excited CT States of Ru(II) and Pt(II) Compounds and Excited d-d States of Rh(III) Compounds in the Solid State and at Higher Temperature." Coord.Chem.Rev.171. 353-363 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Islam et al.: "A Displaced and Low-frequency Vibration of Phosphorescent State of trans-[Rh(ethylenediamine)_2Cl_2]PF_6 in a Range of 5-497 K." J.Chem.Phys.109(12). 4900-4910 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Islam et al.: "Nonradiative Transition of Phosphorescent Charge-Transfer States of Ruthenium(II)-to-2,2'- Biquinoline and Ruthenium(II)-to-2,2':6',2"-Terpyridine in the Solid." Inorg. Chem.37・12. 3093-3098 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Islam et al.: "Non-radiative Processes of Excited CT States of Ru(II) Compounds in the Solid State and at Higher Temperatures." Coord. Chem. Rev. 171. 353-363 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Islam et al.: "A Displaced and Low-frequency Vibration of Phosphorescent State of trans-[Rh(ethylenediamine)_2Cl_2]PF_6 in a Range of 5-497 K." J. Chem. Phys.109・12. 4900-4910 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Islam et al.: "Dual^3 (d-d) Emission of [RhL_2Cl_2] (PF_6) (L=2,2'-bipyridine and 1,10-phenanthroline) in a crystal in the temperature range of 77-536 K." J.Photochem.Photobiol.A : Chem. 106・1-3. 61-66 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Islam et al.: "Radiationless Transition of Ruthenium (II) Compounds of 2,2'-biquinoline and 2,2' : 6',2"-terpyridine in Solid." Inorg.Chem.37 (in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Islam et al.: "Nonradiative Processes of Excited CT States of Ru (II) -, and Pt (II) -Compounds and Excited d-d States of Rh (III) -Compounds in the Solid State and at Higher Tempratures." Coord.Chem.Rev.(in press). (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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