Kumar, S and Rajamalli, P and Cordes, DB and Slawin, AMZ and Zysman-Colman, E (2020) Highly Fluorescent Emitters Based on Triphenylamine-π-Triazine (D-π-A) System: Effect of Extended Conjugation on Singlet-Triplet Energy Gap. In: Asian Journal of Organic Chemistry, 9 (9). pp. 1277-1285.
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Abstract
Three D-π-A type linearly-extended emitters, based on diphenylamine (DPA) as the donor and 2,4,6-triphenyl-1,3,5-triazine (TRZ) as the acceptor, were synthesized and their optoelectronic properties characterized. The introduction of an additional phenyl or phenylethynyl π-spacer results in an enhancement of the molar extinction coefficient and a systematic bathochromic shift of the charge-transfer transition in the absorption spectra. A mirrored bathochromic shift in the photoluminescence spectra is also observed with increasing conjugation of the bridge moiety. All three compounds show high photoluminescence quantum yields and moderate singlet-triplet excited state energy gaps, ΔEST, of 0.26-0.37 eV were observed in 10 wt doped films in mCP as the host matrix.
| Item Type: | Journal Article |
|---|---|
| Publication: | Asian Journal of Organic Chemistry |
| Publisher: | Wiley-VCH Verlag |
| Additional Information: | Copy right for this article belongs to Wiley-VCH Verlag |
| Keywords: | donor-acceptor charge transfer fluorescence thermally activated delayed fluorescence triazine |
| Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
| Date Deposited: | 11 Dec 2020 11:55 |
| Last Modified: | 08 Dec 2022 11:34 |
| URI: | https://eprints.iisc.ac.in/id/eprint/65653 |
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