503309-89-5Relevant articles and documents
A comparison of linear optical properties and redox properties in chalcogenopyrylium dyes bearing ortho-substituted aryl substituents and tert-butyl substituents
Panda, Jagannath,Virkler, Peter R.,Detty, Michael R.
, p. 1804 - 1809 (2007/10/03)
A series of thiapyrylium pentamethine dyes (4 and 12-15) bearing 2,2′-di-tert-butyl-6,6′-diphenyl, 2,2′-di-tert-butyl-6,6′-bis(2,6-dimethylphenyl), 2,2′-di-tert-butyl-6,6′-bis(2-methylphenyl), 2,2′,6,6′-tetrakis(2,6-dimethylphenyl), and 2,2′,6,6′-tetrakis(2-methylphenyl) substituents, respectively, were prepared and their linear optical properties and electrochemical redox properties were measured and compared to thiapyrylium pentamethine dyes 3 and 5. The tert-butyl and 2,6-dimethylphenyl substituents give nearly identical chromophores with respect to values of λmax, molar extinction coefficients (ε), bandwidths at half-height (ν1/2), and lack of absorption in the visible spectrum. The 2-methylphenyl substituent imparts linear optical properties that are intermediate between those of the tert-butyl and phenyl substituents. The 2,6-dimethylphenyl and 2-methylphenyl substituents impart greater oxidative stability based on anodic shifts in oxidation potential.
