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Synthesis and UV-vis Study of a New Strongly Solvatochromic Merocyanine-like Dye with Modified Donor Part

Sawicka M., Soroka J., Wróblewska E., Zawadzka I.

Polish Journal of Chemistry

2006

Vol. 80, nr 8

1337-1351

The new solvatochromic dye, deprotonated 5-(6-hydroxynaphthyl-2)-7,7-dimethyl- 7H-indolo[1,2-a]quinolinium perchlorate, was synthesized and studied in numerous solvents differing in polarity. The interpretation of the obtained results was made on the basis of VBHB model. The comparison with a dye of shorter distance between donor and acceptor parts indicated that the new dye is the best of all known solvatochromic merocyanines, comparable with Reichardt-Dimroth betaine.