. 2019 Jun 21;10(29):6944–6956. doi: 10.1039/c9sc02197c

Table 1. Photophysical properties and emission spectra of 2, 3, and 10 ^a ^, ^b ^, ^c .


Cpd	λ _max abs (nm) pH 7.2	λ _max abs (nm) pH 4.5	λ _max flu (nm)	FEF pH 7.4/4.5 ^d ^, ^e
1	749	685	707	21 13a
2	755	693	713	23
3	757	696	716	18
10	705	703	733	1.0

^aDMEM/10% FBS solutions with 4 mM TX-100.

^bTo allow a common comparison for each fluorophore solution across a wide acidity range 4 μM Triton X 100 was included in each solution.

^cFluorescence spectra taken at 5 μM concentration, 2 (black spectra) 3 (grey spectra) 10 (red spectrum), inset shows expansion of spectra for 2 and 3.

^dFluorescence enhancement factor (FEF).

^eFluorescence quantum yields at pH 7.4 of 2 and 3 = 0.16 and 0.18 respectively (ESI).

Table 1. Photophysical properties and emission spectra of 2, 3, and 10 a , b , c .

Table 1. Photophysical properties and emission spectra of 2, 3, and 10 ^a ^, ^b ^, ^c .