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2003 Fiscal Year Final Research Report Summary

Trial Manufacture of A Pulsed High Frequency EPR Machine

Research Project

Project/Area Number 13354008
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Physical chemistry
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

YAMAUCHI Seigo  TOHOKU UNIVERSITY, Institute of Multidisciplinary Research for Advaneced Materials, Professor, 多元物質科学研究所, 教授 (10127152)

Co-Investigator(Kenkyū-buntansha) TERO Shozo  TOHOKU UNIVERSITY, Institute of Multidisciplinary Research for Advaneced Materials, Professor, 多元物質科学研究所, 教授 (80111318)
OHBA Yasunori  TOHOKU UNIVERSITY, Institute of Multidisciplinary Research for Advaneced Materials, Associate Professor, 多元物質科学研究所, 助教授 (10176985)
AKIYAMA Kimio  TOHOKU UNIVERSITY, Institute of Multidisciplinary Research for Advaneced Materials, Associate Professor, 多元物質科学研究所, 助教授 (10167851)
SUZUKI Hirosuke  Key Com Co., Group Leader, 開発技術部, 部長(研究職)
Project Period (FY) 2001 – 2003
KeywordsHigh frequency EPR / Time-Resolved EPR / Pulsed EPR / W-band EPR / Photo-Chemical Reaction / Reaction Intermediate / Excited Multiplet State / ELDOR
Research Abstract

We have succeeded in manufacture of pulsed high frequency W-band (95 GHz) EPR machine for the first time in Japan, which is useful for measurements of Fourier transform EPR, Electron Spin Echo envelop-modulation EPR, spin relaxations, and Electron-electron Double Resonance (ELDOR) EPR. The followings are summaries of this research.
1.For the optical measurement, the fiber can be movable and is put into a sample tube, which makes an excitation efficiency increase by a factor of more than 5 and makes the measurement of de-gassed samples possible.
2.The bandwidth of the pre-amplifier is exchanged from an original 6 MHz to 150 MHz, which makes time-resolution of this machine change from 150 ns to 10 ns.
3.To find out a resonance frequency in the cavity, the frequency sweep and two-phase detection devices are made.
4.The maximum microwave power is 250 mW, which is fifty times higher than commercial one and makes a short pulse of less than 50 ns possible.
5.By using Mn(II) ion, we have succeeded in observation of a free induction decay (FID) signal at the W-band. The 20 ns pulse width can be realized as the 90 degree pulse, which is much shorter than the commercial one (150 ns).
6.The ELDOR experiment using two different frequencies is also possible to perform with this.

  • Research Products

    (13 results)

All 2004 2003 2001

All Journal Article (12 results) Book (1 results)

  • [Journal Article] Recent Developments in Studies of Electronic Excited States by Means of Electron Paramagnetic Resonance Spectroscopy2004

    • Author(s)
      S.Yamauchi
    • Journal Title

      Bull.Chem.Soc.Jpn. 77

      Pages: 1255-1268

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Structures and Electronic States of Photoexcited States in a System of Two Nitroxide Radicals Linked Fullerene Studied by 2D Pulsed Nutation and TREPR Spectroscopy2004

    • Author(s)
      Y.Ohba et al.
    • Journal Title

      Appl.Magn.Reson. 24

      Pages: 117-134

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Recent Developments in Studies of Electronic Excited States by Means of Elecreon Paramagnetic Resonance Spectroscopy2004

    • Author(s)
      S.Yamauchi
    • Journal Title

      Bull.Chem.Soc.Jpn. 77

      Pages: 1255-1268

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Structures and Electronic States of Photoexcited States in a System of Two Nitroxide Radicals Linked Fullerene Studied by Two Dimensional Pulsed Nutation and Time-Resolved Electron Paramagnetic Resonance Spectroscopy2004

    • Author(s)
      Y.Ohba et al.
    • Journal Title

      Appl.Magn.Reson. 24

      Pages: 117-134

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Substrate specificities of Deuterolysin from Aspergillus oryzae and EPR Measurement of Cobalt-substituted Deuterolysin2003

    • Author(s)
      Y.Doi et al.
    • Journal Title

      Biosci, Biotechnol.Biochem. 67(2)

      Pages: 264-270

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] On the g Value Shift and Intersystem Crossing in Photo-Excited Radical-Triplet Systems2003

    • Author(s)
      Y.Iwasaki et al.
    • Journal Title

      Appl.Magn.Reson. 23

      Pages: 377-391

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Time resolved-EPR Study of the Excited Triplet States of Dibenzo-cycloheptadienylidene2003

    • Author(s)
      K.Akiyama et al.
    • Journal Title

      J.Phys.Chem.A. 107(10)

      Pages: 1447-1451

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Substrate specificities of Deuterolysin from Aspergillus oryzae and Electron Paramagnetic Resonance Measurement of Cobalt-substituted Deuterolysin2003

    • Author(s)
      Y.Doi et al.
    • Journal Title

      Biosci, Biotechnol.Biochem. 67(2)

      Pages: 264-270

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Time-resolved(TR) EPR Study of the First Excited Triplet States of Dibenzocycloheptadienylidene and Diphenyl- methylene derivatives2003

    • Author(s)
      K.Akiyama et al.
    • Journal Title

      J.Phys.Chem.A 107(10)

      Pages: 1447-1451

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Principle of FPR Time Tiem resolved EPR2003

    • Author(s)
      S.Tero-Kubota et al.
    • Journal Title

      Introduction to Spin Science and Technology, Business Center for Academic Societies Japan 5-17

      Pages: 102-115

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Excited Quartet and Doublet States in the Complex of znTPP and a Nitroxide Radical : X-band and W-Band Time-Resolved EPR Studies2001

    • Author(s)
      J.Fujisawa et al.
    • Journal Title

      Appl.Magn.Reson. 21

      Pages: 483-493

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Excited Quartet and Doublet States in the Complex of Tetraphenyl-porphyrine Zinc(II) and a Nitroxide Radical in Solution : X-band and W-Band Time-Resolved EPR Studies2001

    • Author(s)
      J.Fujisawa et al.
    • Journal Title

      Appl.Magn.Reson. 21

      Pages: 483-493

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] 電子スピンサイエンス&スピンテクノロジー入門2003

    • Author(s)
      手老省三
    • Total Pages
      27
    • Publisher
      日本学会事務センター
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2006-07-11  

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