Table 1.
Abs. λmax [nm] (ε × 103)a) | Em λmax [nm]a) | Φ [%]a), b) | Φ [%]c) | τobs [µs]a) | τr [µs]a) | FWHMd) | E ox ½ (ΔE p) [V]e) | E re pc [V]e) | T d [°C]f) | |
---|---|---|---|---|---|---|---|---|---|---|
Cz‐1 | 289(33), 324.5(24), 358(15) | 486 | 100 | 80.3 | 2.77 | 2.77 | 3420 | 0.55 (0.09) | −2.98 | 423 |
Cz‐2 | 287(31), 361(15) | 473 | 83.5 | 86.9 | 3.20 | 3.83 | 3440 | 0.69 (0.08) | −2.81 | 448 |
Cz‐3 | 287(31), 322(19), 363.5(15) | 476 | 82.7 | 95.6 | 2.7 | 3.26 | 3400 | 0.68 (0.09) | −2.79 | 386 |
All photophysical data were recorded in CH2Cl2 with a conc. of 10−5 M at RT, ε is in M −1 cm−1
Emission was measured with excitation at 375 nm and in reference to Coumarin 102 in MeOH (Φ = 80%)
Measured in doped film (10 wt% in DPEPO matrix)
Full width at half‐maxima of PL in cm−1
E ½ = [(E pa + E pc)/2] and ΔE p = |E pa − E pc| in V, while E pa and E pc are defined as the anodic and cathodic peak potentials referenced to Fc+/Fc
T d is the temperature with 5% of weight loss in thermogravimetric analysis.