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We have studied the solvation dynamics of 4-amino-N-methyl-phthalimide ͑4-ANMP͒ in n-butanol and n-decanol solutions. Solvation time correlation functions were evaluated from wavelength-dependent fluorescence lifetime distributions at two temperatures for the two solvents. Solvation dynamics of 4-ANMP was strongly temperature dependent in n-butanol, which is a more polar and less viscous solvent than n-decanol. A smaller effect was observed in n-decanol solution. We also measured the rotational correlation times of 4-ANMP in the same solutions and resolved two components indicative of a nonspherical structure of the molecule. The solvation times with relation to the dielectric relaxation times L and D for linear alcohols are discussed.

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An instantaneous normal mode analysis of solvation: Methyl iodide in high pressure gases Ultrafast solvation dynamics of styrenic probes. Different behavior of polar and nonpolar excited singlet states AIP Conf.We have studied the solvation dynamics of 3-aminophthalimide ͑3-AP͒ in n-butanol. The fluorescence lifetimes and the rotational correlation times of the molecule were measured at several wavelengths over the emission spectrum at six temperatures. Solvation time correlation functions were evaluated from wavelength dependent fluorescence lifetime distributions at four temperatures for 3-AP in n-butanol solution. The solvation dynamics of 3-AP was strongly temperature dependent. The solvation times of 3-AP were compared to the dielectric relaxation times ͑ L and D ͒ of n-butanol and to the solvation times of 4-amino-N-methyl-phthalimide ͑4-ANMP͒ studied earlier in n-butanol and n-decanol solutions. The solvation time of 3-AP molecule in n-butanol at room temperature was much closer to the longitudinal dielectric relaxation time than to the Debye time. At low temperatures the solvation times of 3-AP and 4-ANMP approach the Debye times of n-butanol. The solvation dynamics of 3-AP occurs on a time scale roughly given by the longitudinal relaxation time as predicted by the simple continuum theory.