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1995 Fiscal Year Final Research Report Summary

Application of time-resolved Raman spectroscopy using a F/1.8-spectrometer to the study of Electrochemical reaction processes

Research Project

Project/Area Number 06453028
Research Category

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

Allocation TypeSingle-year Grants
Research Field Physical chemistry
Research InstitutionWaseda University

Principal Investigator

ITOH Koichi  Waseda Univ.School of Sci.& Engineerin Professor, 理工学部, 教授 (40008503)

Co-Investigator(Kenkyū-buntansha) TAKAHASHI Hiroaki  Waseda Univ.School of Sci.& Engineerin Professor, 理工学部, 教授 (40063622)
Project Period (FY) 1994 – 1995
KeywordsTime-resolved Raman spectroscopy / electrode reactions / bachteriochlorophyll a / liquid crystal cell
Research Abstract

The results are summarized as follows.
(1) Solvent effects of the resonance Raman spectra of bachteriochlorophyll a cation radical
The absorption and resonance Raman spectra of bachteriochlorophyll a cation radical (BChl a^<+・>), which were prepared electrochemically at a platinum electrode surface in fourteen solvents, were measured. The correlation sensitive time-between the states of ligation of the radical (5-or 6-coordinated) and the solvent effects of the absorption and RR spectra were established and applied to analyze the absorption and RR spectra of a photo-excited reaction center of a photosynthetic bactetria.
(2) Study of electrochemical oxidation processes of a benzidine derivative by time-resolved resonance Raman spectroscopy
One-and two-electron oxidation processes of 3,3', 5,5'-tetramethylbenzidine (TMB) at a platinun electrode surface were studied by using a time-resolved resonance Raman spectroscopy. The results indicated the following facts ; (i) one-electron oxidation pr … More oduct, monocation radical (TMB^<+・>), is readily converted to TMB and a dication (TMB^<2+>) through a disproportination reaction, (ii) the dication is deprotonated to form a neutral species (DMB), (iii) TMB and DMB forms a stable charge transfer complex, and (iv) a high electric conductivity observed for an electro-deposition product of TMB can be ascribed to the charge transfer complex state.
(3) Time-resolved total internal reflection Raman scattering study on electric-field-induced reorientation dynamics of a nematic liquid crystal cell
Total internal reflection (TIR) Raman scattering spectroscopy was performed by using a nematic liquid crystal (LC) cell of 4-hexyl-4'-cyanobiphenyl fablicated at the bottom of a high refractive index hemi-cylindrical prism. Time-resolved TIR Raman spectra indicated that a time-response of LC at the proximity of an alignment SiOx layr to an applied external electric field shows an induction period, being appreciably slower than that of LC in the bulk phase. Less

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Y. Misono, M. Nagase and K. Itoh: "Time-resolved surface-enhanced resonance Raman scattering study of the reduction process of heptylviologen monocation radical film on silver electrode surfaces." Spectrochim. Acta. 50A. 1539-1553 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Misono, Enishizawa, L.Limantara, Y. Koyama and K. Itoh: "Solvent effects of the resonance Raman spectra of bacteriochlorophyll a cation radical." Chem. Phys. Lett.236. 413-418 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Misono, L. Limantara, Y. Koyama and K. Itoh: "The solvent effects on resonance Raman and electronic spectra of bacteriochloro-phyll a cation radical." J. Phys. Chem.100. 2422-2429 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J. Tanno, K. Itoh, A. Tsuji and K. Hori: "Infrared spectroscopic study on the crystalline polymorphism and phasetransitionbehavior of mesogenic 4-heptyloxy-4'-cyanobiphenyl." J. Mol. Struct.379. 121-134 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Misono, Y. Ohkata, T. Morikawa and K.Itoh: "Resonance raman and absorption spectroscopic studies on the electrochemical oxidation processes of 3, 3', 5, 5'-tetramethylbenzidine." J. Electroanal. Chem.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Morikawa, E. Shirai, J. Tanno, H. Takahashi, A. Yasuda and K. Itoh: "Time-resilved total internal reflection Raman scattering study on electric-field-induced reorientation dynamics of nematic liquid crystal of 4-hexyl-4'-cyanobiphenyl" Mol. Cryst. Liq. Cryst.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Misono, M.Nagase and K.Itoh: "Time-resolved surface-enhanced resonance Raman scattering study of the reduction process of heptylviologen monocation radical film on silver electrode surfaces." Spectrochim. Acta. 50A. 1539-1553 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Misono, Enishizawa, L.Limantara, Y.Koyama and K.Itoh: "Solvent effects of the resonance Raman spectra of bacteriochlorophyll a cation radical." Chem.Phys.Lett.236. 413-418 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Misono, L.Limantara, Y.Koyama and K.Itoh: "The solvent effects on resonance Raman and electronic spectra of bacteriochloro-phyll a cation radical." J.Phys.Chem.100. 2422-2429 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] J.Tanno, K.Itoh, A.Tsuji and K.Hori: "Infrared spectroscopic study on the crystalline polymorphism and phasetransition behavior of mesogenic 4-heptyloxy-4'-cyanobiphenyl." J.Mol.Struct.379. 121-134 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Misono, Y.Ohkata, T.Morikawa and K.Itoh: "Resonance Raman and absorption spectroscopic studies on the electrochemical oxidation processed of 3,3', 5,5'-tetramethylbenzidine." J.Electroanal.Chem.(In press.).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Morikawa, E.Shirai, J.Tanno, H.Takahashi, A.Yasuda and K.Itoh: "Time-resilved total internal reflection Raman scattering study on electric-field-induced reorientation dynamics of nematic liquid crystal of 4-hexyl-4'-cyanobiphenyl." Mol.Cryst.Liq.Cryst.(In press.).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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