Table 1 One- and two-photon photophysical parameters of eLACCO2.1

Relative fraction of neutral chromophore (ρ_N)

0.97

0.24

0.97

0.57

0.97

0.79

0.74^b

0.17^b

0.07^c

Relative fraction of anionic chromophore (ρ_A)

0.03

0.76

N/A

0.43

N/A

0.21

0.26^b

0.83^b

0.93^c

Neutral extinction coefficient (mM⁻¹ cm⁻¹, ε_N)

42

45

34

38

39

39

N/A

N/A

N/A

Anionic extinction coefficient (mM⁻¹ cm⁻¹, ε_A)

76

65

78

89

81

74

2.1

57

56.0^d; 58.3^e

Neutral quantum yield (φ_N)

0.06

N/A

0.20

0.23

N/A

N/A

N/A

N/A

N/A

Anionic quantum yield (φ_A)

0.47

0.82

0.60

0.78

0.72

0.84

0.47

0.53

0.67^d; 0.76^e

Molecular brightness (ρ_A × ε_A × φ_A)

1.1

41

4.5^f

30

0.74

13

0.26

25

34.9^d; 41.2^e

Neutral one-photon absorbance peak (nm)

395

398

398

397

400

400

N/A

N/A

N/A

Anionic one-photon absorbance peak (nm)

493

494

493

496

492

492

N/A

N/A

488^d

Two-photon cross section (GM) (position/nm)

N/A

32 (932)

N/A

48 (924)

N/A

42 (928)

N/A

25

54 (911)^e

Two-photon brightness F₂ (GM) (position/nm)^g

0.88^h (932)

20 (932)

2.2 (924)

16 (924)

0.52 (928)

7.3 (928)

N/A

N/A

41 (911)^e