Table 2.

Linear photophysical and photochemical parameters of 1 and 1:Zn²⁺ complexes in organic (THF) and aqueous (water/ACN) medium: absorption ${\lambda }_{\mathit{abs}}^{max}$ and fluorescence ${\lambda }_{fl}^{max}$ maxima, Stokes shifts, maximum extinction coefficients ε^max, fluorescence quantum yields Φ, lifetimes τ and quantum yields of photochemical decomposition under one-photon irradiation Φ_1PA.

N/N	THF + Zn2+ (M ≈ 2.4·10−4M)	Water/ACN (1:1)	Water/ACN (1:1) + Zn2+ (M ≈ 2.4·10−4M)
${\lambda }_{\mathit{abs}}^{max}$, nm	381 ± 1	380± 1	379± 1
${\lambda }_{fl}^{max}$, nm	462 ± 1	534 ± 1	498 ± 1
Stokes shift, cm−1	4600 ± 100	7590 ± 100	6300 ± 100
εmax ·10−3, M−1·cm−1	72 ± 5	49 ± 3	52 ± 3
Φ	0.73 ± 0.05	0.46 ± 0.03	0.51 ± 0.03
τ, ns*	1.18 ± 0.08	1.41 ± 0.08	1.27 ± 0.08
Φ1PA ·104	3.0 ± 0.8	5.1 ± 2	6.0 ± 2

^*All lifetime measurements correspond to goodness-of-fit parameters χ² ≥ 0.99.