Spectra of Anions in Pure Iodine Melt and Iodine Solution Containing Tellurium

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概要

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• The absorption spectra in the ultraviolet and visible region were measured as a function of the temperature for pure molten I<SUB>2</SUB> and for I<SUB>2</SUB>+Te solutions. The two peaks found at about 305 and 370 mμ can be attributed to the I<SUB>3</SUB><SUP>−</SUP> ion. These peaks increase with the addition of Te indicating an increase in the concentration of the I<SUB>3</SUB><SUP>−</SUP> ion. This result is consistent with the previous interpretation of the conductivity of molten I<SUB>2</SUB> containing Te. The ionization potential of I<SUB>3</SUB><SUP>−</SUP> can be estimated to be about 3.1 eV on the basis of a cyclic analysis using the model of Stein and Treinin which was developed for anion spectra in aqueous solutions. The temperature shift of the absorption energy can also be interpreted in terms of the same model. The heat change for the I<SUB>2</SUB>(g)+I(g)=I<SUB>3</SUB>(g) reaction is estimated as −48.0 kcal·mol<SUP>−1</SUP>.

• 公益社団法人 日本化学会の論文

著者

• Shimoji Mitsuo

  Department Of Chemistry Faculty Of Science Hokkaido University

• Ichikawa Kazuhiko

  Department Of Chemistry Faculty Of Science Hokkaido University

• Shimoji Mitsuo

  Department of Chemistry, Faculty of Science, Hokkaido University

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