Table 2.
Photophysical parameters of DMF‐BP‐PXZ, DPF‐BP‐PXZ, and SBF‐BP‐PXZ in solutions and neat films
| DMF‐BP‐PXZ | DPF‐BP‐PXZ | SBF‐BP‐PXZ | ||||
|---|---|---|---|---|---|---|
| Soln | Film | Soln | Film | Soln | Film | |
| Φ prompt[%]a) | 2.6 | 32.1 | 2.8 | 37.5 | 1.8 | 35.9 |
| Φ delayed[%] | – | 13.3 | – | 11.2 | – | 9.6 |
| Φ ISC [%] | – | 29.3 | – | 23 | – | 21.1 |
| Φ RISC [%] | – | 45.4 | – | 48.7 | – | 45.5 |
| k F [× 106 s−1] | 11.1 | 10.6 | 8.8 | 13.5 | 10.1 | 13 |
| k IC [× 107 s−1] | 41.7 | 1.3 | 30.5 | 1.4 | 55.2 | 1.6 |
| k ISC [× 106 s−1] | – | 9.7 | – | 8.2 | – | 7.7 |
| k RISC[× 106 s−1] | – | 1.0 | – | 1.2 | – | 1.1 |
a)
Abbreviations: Φ prompt and Φ delayed = prompt and delayed components, respectively, determined from the total Φ PL and the proportion of the integrated area of each component in the transient spectra to the total integrated area; Φ ISC = the intersystem crossing quantum yield; k F = fluorescence decay rate; k IC = internal conversion rate; k ISC = intersystem crossing rate; k RISC = reverse intersystem crossing rate.