The electronic spectra of intramolecular charge-transfer compounds and their marked solvatochromism in a strong hydrogenbonding solvent: 2-(arylmethylene)-1,3-indandiones and 2-(1-naphthyl)-p-benzoquinone.

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概要

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• The first electronic absorption bands of the title compounds can all be assigned to the intramolecular charge-transfer transitions. The solvent effects on these bands are quite analogous to those on the absorption bands characteristic of binary charge-transfer complexes. Especially, when the title compounds are dissolved in trifluoroacetic acid, marked bathochromic shifts of the first bands are observed, in harmony with their charge-transfer character. Such solvatochromism is obviously due to the hydrogen-bond formation between the solute and the solvent molecules. When strong hydrogen bonding occurs, the electron affinity of the 2-methylene-1,3-indandione moiety increases by about 0.41 eV.

• 公益社団法人 日本化学会の論文

著者

• Chiba Kazuhiko

  Department Of Agricultural Chemistry Faculty Of Agriculture Tohoku University

• Aihara Jun-ichi

  Department Of Biology And Geosciences Faculty Of Science National University Corporation Shizuoka Un

• Araya Kotaro

  Department of Chemistry, Faculty of Science, Hokkaido University

• Matsunaga Yoshio

  Department of Chemistry, Faculty of Science, Hokkaido University

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