Table 2.

Fluorescence decay parameters of fisetin tautomer (Fis (T))^a and fisetin normal (Fis (N))^b species in water and in presence of γ-CDx

Sample	τ1(ns)	τ2(ns)	τ3 (ns)	α1	α2	α3	τ̄(ns)	χ2r	DW
Fis (T) a in water	0.044	1.11	----	0.937	0.063	----	0.715	1.19	1.76
Fis (T)a in 10mM γ-CDx	0.18	1.36	6.68	0.551	0.283	0.166	4.99	1.09	1.80
Fis (T)a in 20mM γ-CDx	0.17	1.59	6.81	0.453	0.288	0.259	5.55	1.13	1.82
Fis (N)b in water	0.011	0.73	----	0.998	0.002	----	0.096	1.16	1.85
Fis (N)b in 10mM γ-CDx	0.018	0.75	2.56	0.994	0.005	0.001	0.40	1.18	1.70
Fis (N)b in 20mM γ-CDx	0.018	0.63	2.12	0.993	0.006	0.001	0.30	1.11	1.78

γ-CDx solutions are prepared in water, [Fis]= 7.5 μM,

^a(λ_ex = 375 nm, λ_em = 550 nm),

^b(λ_ex = 375 = 450 nm), FWHM ≈ 115 ps, $\overline{\tau }=\frac{{\displaystyle \sum _i}{a}_i{\tau }_i^2}{{\displaystyle \sum _i}{a}_i{\tau }_i}$