Table 1 One- and two-photon photophysical parameters of eLACCO1.1.

Relative fraction of neutral chromophore (ρ_N)

0.97 ± 0.07

0.57 ± 0.04

0.07^a

Relative fraction of anionic chromophore (ρ_A)

N/A

0.43 ± 0.03

0.93^a

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

34

38

N/A

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

78

89

56.0^b; 58.3^c

Neutral quantum yield (φ_N)

0.20 ± 0.01

0.23 ± 0.01

N/A

Anionic quantum yield (φ_A)

0.60 ± 0.03

0.78 ± 0.04

0.67^b; 0.76^c

Molecular brightness (ρ_A × ε_A × φ_A)

N/A

29.9

34.9^b; 41.2^c

Neutral 1PA peak (nm)

398

397

N/A

Anionic 1PA peak (nm)

493

496

488^b

Two-photon brightness F₂ (GM)^d

2.2 ± 0.3 (924 nm)

16 ± 2 (924 nm)

38 (911 nm)^c