. 2019 Jun 3;9:8250. doi: 10.1038/s41598-019-44760-9

Table 2.

Absorption (λ_abs,max) and emission (λ_em,max) maxima of the ICAAc derivatives at pH = 3 and pH = 11, respectively, in aqueous buffer.

Compound	pH = 3		pH = 11		I₃/I₁₁	pK_a	pK_a
	λ_abs,max	λ_em,max	λ_abs,max	λ_em,max		pK_a	pK_a
	(nm)		(nm)			(UV-vis)	(PL)
*ICAAc*	470	554	428	553	2.25	7.05 ± 0.02	6.96 ± 0.07
*monoMICAAc*	475	553	446	553	1.61	7.35 ± 0.07	7.22 ± 0.15
*diMICAAc*	502	577	470	572	0.58	7.58 ± 0.03	7.71 ± 0.13

I₃/I₁₁ is the fluorescence intensity ratio measured at pH = 3 and pH = 11. pK_a is the acid dissociation constant at a logarithmic scale.