A donor element for thermal diffusion-transfer imaging having a donor layer comprising a thermally transferable colourant and a radiation-absorber in which the radiation-absorber is a croconium dye
Photochemistry of squaraine dyes. 6. Solvent hydrogen bonding effects on the photophysical properties of bis(benzothiazolylidene)squaraines
作者:Suresh Das、K. George Thomas、R. Ramanathan、M. V. George、P. V. Kamat
DOI:10.1021/j100153a033
日期:1993.12
The photophysical properties of two bis(benzothiazolylidene)squaraine dyes have been studied in aromatic hydrocarbon and alcoholic solvents. These dyes exhibit fluorescence quantum yields of 0.06-0.52 and excited singlet lifetimes of 0.48-2.5 ns in these solvents. Although the photophysical properties of the dyes are independent of solvent polarity in the hydrocarbon solvents, in alcoholic solvents a marked hyposchromic shift in the absorption and emission spectra and a reduction in lifetimes of excited state have been observed. These effects have been correlated with the hydrogen bond donating ability of the alcoholic solvents.
Kharitonova, O. V.; Alieva, Z. M.; Makin, S. M., Journal of Organic Chemistry USSR (English Translation), 1992, vol. 28, # 10.2, p. 1732 - 1736