In terms of photophysical properties, the absorption spectrum in THF of (+)-(S,
S)-7 exhibited an intense intramolecular charge-transfer absorption band at about
380 nm in THF. As expected for such D-A-D chromophores, this molecule exhibited
a strong positive solvatochromism with maximum emission wavelengths ranging
from 508 nm in hexane to 562 nm in acetonitrile. Interestingly, although the
Fig. 13.5 (a) g abs values in toluene solutions and in thin films measured at 405 nm for 3, 436 nm for
4, 440 nm for 5, and 450 nm for 6; (b) g lum values in toluene solutions and in thin films. Measured at
493 nm for 3, 530 nm for 4, 531 nm for 5, and 585 nm for 6 in solution (wavelengths used to
measure gabs and glum in thin film were not indicated by the authors)
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301
S)-7 exhibited an intense intramolecular charge-transfer absorption band at about
380 nm in THF. As expected for such D-A-D chromophores, this molecule exhibited
a strong positive solvatochromism with maximum emission wavelengths ranging
from 508 nm in hexane to 562 nm in acetonitrile. Interestingly, although the
Fig. 13.5 (a) g abs values in toluene solutions and in thin films measured at 405 nm for 3, 436 nm for
4, 440 nm for 5, and 450 nm for 6; (b) g lum values in toluene solutions and in thin films. Measured at
493 nm for 3, 530 nm for 4, 531 nm for 5, and 585 nm for 6 in solution (wavelengths used to
measure gabs and glum in thin film were not indicated by the authors)
13 Design of Circularly Polarized Thermally Activated Delayed Fluorescence Emitters
301