Journal of the Spectroscopical Society of Japan
Online ISSN : 1884-6785
Print ISSN : 0038-7002
ISSN-L : 0038-7002
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Volume 56, Issue 4
Displaying 1-7 of 7 articles from this issue
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  • Structural and Electronic Properties of Low-dimensional C60 Polymers Studied by Photoelectron Spectroscopy
    Jun ONOE
    2007 Volume 56 Issue 4 Pages 159-169
    Published: August 15, 2007
    Released on J-STAGE: January 04, 2011
    DOIhttps://doi.org/10.5111/bunkou.56.159
    JOURNAL FREE ACCESS
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    When a C60 film was irradiated with UV-visible light and electron-beam under a ultrahigh vacuum condition, photo-induced polymerization and electron-induced polymerization between adjacent C60 molecules take place via [2 + 2] dumbbell-shaped and peanut-shaped cross-linkages, respectively. We have investigated the electronic structure of both dumbbell-shaped and peanut-shaped C60 polymers, using in situ x-ray and ultraviolet photoelectron spectroscopy, and found that the dumbbell-shaped C60 polymer has a two-dimensional hexagonal structure, while that the peanut-shaped C60 polymer has a quasi-one-dimensional structure. In the present paper, we review the photoelectron spectroscopic results of these low-dimensional C60 polymers, together with results of their structural and electronic properties obtained using other measurements and density-functional calculations. Finally, we will describe the perspective of both dumbbell- and peanut-shaped C60 polymers. In particular, the latter polymer is interesting to be a π-electron conjugated system with negative Gauss curvature.
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  • A Terahertz Light Source Based on the Difference Frequency of Two CO2 Lasers and Its Application to Molecular Spectroscopy
    Fusakazu MATSUSHIMA
    2007 Volume 56 Issue 4 Pages 170-179
    Published: August 15, 2007
    Released on J-STAGE: January 04, 2011
    DOIhttps://doi.org/10.5111/bunkou.56.170
    JOURNAL FREE ACCESS
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    A tunable light source in the terahertz region synthesized from two CO2 lasers and a microwave source is introduced with its principles, features, and applications to high resolution spectroscopy. This light source, called TuFIR in short, covers the frequency range from about 0.5 to 6 THz. The accuracy of the synthesized frequency of about 30 kHz enables us to study the spectral lines in the terahertz region with high accuracy comparable to those of microwave spectoscopy. Examples of the spectroscopy of molecules, radicals, and molecular ions investigated with TuFIR spectrometer are shown.
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  • [title in Japanese]
    [in Japanese]
    2007 Volume 56 Issue 4 Pages 180-182
    Published: August 15, 2007
    Released on J-STAGE: January 04, 2011
    DOIhttps://doi.org/10.5111/bunkou.56.180
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2007 Volume 56 Issue 4 Pages 183-184
    Published: August 15, 2007
    Released on J-STAGE: January 04, 2011
    DOIhttps://doi.org/10.5111/bunkou.56.183
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  • [title in Japanese]
    [in Japanese]
    2007 Volume 56 Issue 4 Pages 185
    Published: August 15, 2007
    Released on J-STAGE: January 04, 2011
    DOIhttps://doi.org/10.5111/bunkou.56.185
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    2007 Volume 56 Issue 4 Pages 186-187
    Published: August 15, 2007
    Released on J-STAGE: January 04, 2011
    DOIhttps://doi.org/10.5111/bunkou.56.186
    JOURNAL FREE ACCESS
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  • Plasma and Spectroscopic Analysis
    IV.Direct-current Plasmas as Excitation Source in Atomic Emission Spectrometry
    Kazuaki WAGATSUMA
    2007 Volume 56 Issue 4 Pages 188-196
    Published: August 15, 2007
    Released on J-STAGE: January 04, 2011
    DOIhttps://doi.org/10.5111/bunkou.56.188
    JOURNAL FREE ACCESS
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    This lecture describes the spectrochemical characteristics of direct-current discharge plasmas generated by arc, spark, and glow discharges, which are generally employed as an excitation source for direct analysis of solid samples in atomic emission spectrometry. Emission spectra excited from arc discharge plasmas under ambient atmosphere are much different from those from low-pressure glow discharge plasmas. Excitation phenomena in glow discharge plasmas are described in detail so that a particular excitation mechanism occurring in the reduced pressure plasma, called charge transfer collision, can be well understood.
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