Helvetica Chimica Acta p. 1583 - 1595 (1987)
Update date:2022-08-05
Topics:
Kussler, Manfred
Balli, Heinz
A series of novel long-chain alkyl-dimethinmerocyanine dyes containing the (rhodaninyl)benzenesulfonate or (cyanoacetoxy)alkanesulfonate group is synthesized in good yield and their aggregation tendency in H2O and/or in various organic solvents/H2O mixtures without addition of salt investigated.Except for the merocyanine 2h, all dyes give J-aggregation in H2O or in organic solvents containing H2O.The Lambert-Beer rule is proved for the solution of 3a(4) in H2O.The degree of aggregation of 3a(4) in H2O is investigated by ultracentrifugation.The kind of aggregation (J- or H-type) can be found out very quickly by dissolving the dye in H2O with help of ultra sound.
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