Effect of Concentration on Isomerization of Rhodanine Derivatives of Merocyanine Dyes in Polar Solvents
Figure 6
Electronic absorption of (a) 1 (10−5 M) and (b) 2 (10−5 M) in (1) neutral DMF and (2) after addition of HCl to the solution. The molar ratio of HCl to dye was 10 : 1.