Research note
Absorption and emission properties of the six isomeric di-pyridyl-ketones

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Abstract

The absorption and emission spectra of the six isomeric di-pyridyl-ketones have been investigated in solvents of different polarity. The experimental data have shown that the lowest singlet and triplet states of these molecules are due to nπ* excitation, localized on the carbonyl. CNDO/S calculations of singlet excitation energies on geometries optimized by means of MNDO were performed and found to be in satisfactory agreement with the experimental data.

References (13)

  • K.J. Latas et al.

    Chem. Phys. Lett.

    (1979)
  • S.G. Hilburn et al.

    Chem. Phys. Lett.

    (1983)
  • G. Favaro et al.

    Spectrochim. Acta

    (1989)
  • S. Trovato et al.

    Spectrochim. Acta

    (1976)
  • F.L. Minn et al.

    J. Am. Chem. Soc.

    (1970)
  • C.R. Hurtt et al.

    J. Am. Chem. Soc.

    (1972)
There are more references available in the full text version of this article.

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A full paper (25 pages), including four figures and five tables of spectral experimental and calculated data, has been deposited with the British Library at Boston Spa, Wetherby, West Yorks, U.K. as Supplementary Publication No. SUP 13013. Persons wishing to obtain copies of deposited material should write, citing the accession number, directly to Service Enquiries, British Library Lending Library, Boston Spa, Wetherby, West Yorks, LS23 7BQ, U.K.

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