Table 2. The excitation wavelength (nm), the major composition of orbital transition with its ratio (%), and corresponding oscillator strengthen.

	Transition	λ (nm)	ƒ	Composition	CI (%)
quercetin	S0 → S1	371.69	0.6723	H → L	96.47%
	S0 → S2	320.13	0.0535	H−1 → L	94.58%