Spectral study of the aggregation of benzothiazolic cyanine dyes in solutions and polymolecular layers

The formation ofJ-aggregates of three polymethine dyes in solutions and in Langmuir-Blodgett (LB) polylayers was studied. The dyes formJ-aggregates in mixtures of solvents of different polarity: hexane-chloroform and heptane-chloroform taken in various ratios. The formation ofJ-aggregates in LB polylayers depends on the type of matrix and on the matrix: dye ratio.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 96–99, January, 1995.The authors are grateful to Corresponding Member of the Russian Academy of Sciences M. V. Alfimov for valuable remarks and to Dr. A. I. Tolmachev for kindly donating samples of dyes.This work was financially supported by the Russian Foundation for Basic Research (Project No. 94-03-09182).