Table 1. Excited-State Solvation Time Constants for Nile Red Retrieved from Shifts in the Central Emission Frequency in WR-TCSPC and TA Data^a.

solvent	WR-TCSPC/ps	TA (SE)/ps	TA (ESA1)/ps	literature(46)/ps
1-pentanol	<IRF	9.8 ± 1.8	8.1 ± 1.2	21.7
	250 ± 180	136 ± 37	160 ± 24	151
methanol	<IRF	13.0 ± 1.8	17.9 ± 1.1	15.3
dimethyl sulfoxide	<IRF	5.2 ± 0.3	6.3 ± 1.0	2.29, 10.7

^aNote solvation time scales <2 ps were omitted from our analysis. Literature solvent reorganization multiexponential fit parameters for Coumarin 153 were determined by fluorescence upconversion spectroscopy.⁴⁶