Table 1.
Photophysical data of the cyclothiophenes belonging to series I and II in comparison to the linear reference compounds. Maxima at the absorption and emission wavelengths, λmaxabs and λmaxem (absolute maximum underlined), the extinction coefficient ε and the normalized extinction coefficient (ε/Nr). L5T and L10T denote the linear homologues. Data of series II were taken from [28].
| CnT series | λmaxabs [nm]([eV])a |
ε [L·mol−1·cm−1]a |
ε/Nr [L·mol−1·cm−1]a | λmaxem [nm]([eV])a |
||
| I | II | I | II | |||
| 8 | 396, ~500 (3.13, ~2.48) | 51300 | 6413 | 435, 452 (2.85, 2.74) // 567, 602 (2.19, 2.06) | ||
| 10 | 417, ~500 (2.97, ~2.48) | 86000 | 8600 | ~568, ~629, 685 (~2.18, ~1.97, 1.81) | ||
| 12 | 392 (3.16) | 55000 | 4583 | ~556, 593, ~660 (~2.23, 2.09, ~1.88) | ||
| 15 | 423 (2.93) | 119000 | 7933 | 582, ~603 (2.13, ~2.06) | ||
| 16 | 414 (3.00) | 97000 | 6106 | 577, ~615 (2.15, ~2.02) | ||
| 18 | 421 (2.95) | 123000 | 6833 | 575, ~610 (2.16, ~2.03) | ||
| 20 | 434 (2.86) | 130000 | 6500 | 572, ~603 (2.17, ~2.06) | ||
| 25 | 440 (2.82) | 163000 | 6520 | 570, ~607 (2.18, ~2.04) | ||
| 30 | 444 (2.79) | 183000 | 6100 | 568, 607 (2.18, 2.04) | ||
| 35 | 445 (2.79) | 196000 | 5600 | 567, 604 (2.19, 2.06) | ||
| L5T | 392 (3.16) | 28000 | 5600 | |||
| L10T | 435 (2.85) | 51000 | 5100 | 553, ~587 (2.24, ~2.11) | ||
aSolvent: Dichloromethane.