Binding of Coumarin 334 with β-Cyclodextrin and with C-Hexylpyrogallol[4]arene: Opposite Fluorescence Behavior

Table 2

Time-resolved fluorescence spectral data of C334 in water and in β-CD.

Concentration of 𝛽-CD, mol dm^−3	Energy states	Lifetime (s)	Relative amplitude	𝜒^2	Standard deviation (s)
0	T1	1.03 × 10^−9	60.79	1.14	2.10 × 10^−11
	T2	3.05 × 10^−9	39.21		4.12 × 10^−11
1.0 × 10^−3	T1	1.16 × 10^−9	63.52	1.02	1.85 × 10^−11
	T2	3.57 × 10^−9	36.48		3.88 × 10^−11

Excitation wavelength: 470 nm.
Emission wavelength: 504 nm.