Far-Infrared Spectra of TCNQ Complexes : Their Electronic Structures
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概要
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Far-infrared spectra of quinolinium-(TCNQ)_2, bipyridinium-(TCNQ)_2, 4-amino-2,3,5,6-tetramethyl anilinium-(TCNQ)_2, cobalticinium-(TCNQ)_2, triethylammonium-(TCNQ)_2, lithium-(TCNQ) and TCNQ alone were observed at room temperature. The absorption peaks of the spectra were discovered at 296cm^<-1> for all TCNQ salts. The absorption edges were found at about 40cm^<-1> for all samples except Li(TCNQ) alone. The intensity change in the vicinity of the edges varied in parallel with the electrical conductivity at room temperature. These edges are interpreted as due to the direct allowed transition from a ground state to an excited band on the basis of the fact that the absorption coefficient k is proportional to (ν-νG)^<1/2>. Here ν shows the wave-number of incident light and νG is a constant. Three absorption lines were found at 219cm^<-1>, 143cm^<-1>, and 114cm^<-1> in the TCNQ spectra. A model, in which the excited band is a conduction band, seems to provide a consistent explanation of the temperature dependence of the electrical conductivity. The temperature dependence of the magnetic susceptibilities is also discussed.
- 社団法人日本物理学会の論文
- 1967-07-05
著者
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Kondow Tamotsu
The Institute Of Physical And Chemical Research (riken):department Of Chemistry School Of Science Th
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Kondow Tamotsu
The Institute For Solid State Physics The University Of Tokyo
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INOKUCHI Hiroo
The Institute for Solid State Physics, The University of Tokyo
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SIRATORI Kiiti
The Institute for Solid State Physics, The University of Tokyo
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Inokuchi Hiroo
The Institute For Solid State Physics The University Of Tokyo
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Siratori Kiiti
The Institute For Solid State Physics The University Of Tokyo:(present)department Of Physics Faculty
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Siratori Kiiti
The Institute For Solid State Physics The University Of Tokyo
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