Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2001-05-01

Merocyanine-type dyes from barbituric acid derivatives.

M C Rezende, P Campodonico, E Abuin, J Kossanyi

Index: Spectrochim. Acta. A. Mol. Biomol. Spectrosc. 57(6) , 1183-90, (2001)

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Abstract

The preparation and the solvatochromic behavior of two dyes, obtained by condensation of N,N'-dimethylbarbituric acid with dimethylaminobenzaldehyde and with 4,4'-bis(N,N-dimethylamino)benzophenone (Michler's ketone) are described. The latter dye is rather sensitive to the polarity of the medium, and in particular, to the hydrogen-bond-donor ability of protic solvents. The solvatochromism of both compounds is discussed in terms of the pi* and E(T)(30) solvent polarity scales and their differences in behavior interpreted with the aid of semiempirical calculations.

Related Compounds

  • Michler's ketone

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