Electronic structures and spectra of aminoacetophenones and related compounds.

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概要

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• The S<I><SUB>n</SUB></I>←S<SUB>0</SUB> and S<I><SUB>n</SUB></I>←S<SUB>1</SUB> transition bands were measured with <I>m</I>- and <I>p</I>-dimethylaminoacetophenones and related compounds in order to clarify the characters of the excited singlet states. The observed spectra were reasonably interpreted by the use of the theoretical results based on the composite molecule method. The longest wavelength band (S<SUB>1</SUB>←S<SUB>0</SUB>) of the meta isomer has mainly the local excitation (LE) character of aniline (<SUP>1</SUP>B<SUB>2</SUB>←<SUP>1</SUP>A<SUB>1</SUB>), while that of the para isomer is ragarded as the intramolecular charge-transfer band. In the para isomer the LE transition corresponding to <SUP>1</SUP>B<SUB>2</SUB>←<SUP>1</SUP>A<SUB>1</SUB> is covered by the intense CT band. The S<I><SUB>n</SUB></I>←S<SUB>1</SUB> transitions of the meta isomer are almost of LE character, whereas those of the para isomer are of back CT nature. This is mainly attributed to the difference in the character of S<SUB>1</SUB>.

• 公益社団法人 日本化学会の論文

著者

• Nagakura Saburo

  The Institute for Solid State Physics The University of Tokyo

• Nakagaki Ryoichi

  The Institute for Solid State Physics, The University of Tokyo

• Iwata Suehiro

  The Institute for Solid State Physics, The University of Tokyo

• Kobayasm Takayoshi

  The Institute of Physical and Chemical Research

• Nagakura Saburo

  The Institute for Molecular Science

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