  The solvation dynamics and isomerization process of an organic dye, IR-140,
in polar solvents and nonpolar solvents have been investigated using pump
supercontinuum-probing (PSCP) technique. In all solvents, the dynamics exhibits
solvent-dependent. Solvent induced spectral shifts of the absorption and
emission spectra of IR-140 have also been studied in a variety of solvents. At
the same time, the photoisomerization process has been examined. The
approximate energy-band structure of IR-140 was also supposed firstly.
