Substituent effect on TADF properties of 2-modified 4,6-bis(3,6-di- tert -butyl-9-carbazolyl)-5-methylpyrimidines.
| Autor: | Fiodorova I; Institute of Chemistry, Vilnius University, Naugarduko 24, LT-03225, Vilnius, Lithuania., Serevičius T; Institute of Photonics and Nanotechnology, Vilnius University, Saulėtekio 3, LT-10257 Vilnius, Lithuania., Skaisgiris R; Institute of Photonics and Nanotechnology, Vilnius University, Saulėtekio 3, LT-10257 Vilnius, Lithuania., Juršėnas S; Institute of Photonics and Nanotechnology, Vilnius University, Saulėtekio 3, LT-10257 Vilnius, Lithuania., Tumkevicius S; Institute of Chemistry, Vilnius University, Naugarduko 24, LT-03225, Vilnius, Lithuania. |
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| Jazyk: | angličtina |
| Zdroj: | Beilstein journal of organic chemistry [Beilstein J Org Chem] 2022 May 05; Vol. 18, pp. 497-507. Date of Electronic Publication: 2022 May 05 (Print Publication: 2022). |
| DOI: | 10.3762/bjoc.18.52 |
| Abstrakt: | The interest in organic materials exhibiting thermally activated delayed fluorescence (TADF) significantly increased in recent years owing to their potential application as emitters in highly efficient organic light emitting diodes (OLEDs). Simple modification of the molecular structure of TADF compounds through the selection of different electron-donating or accepting fragments opens great possibilities to tune the emission properties and rates. Here we present the synthesis of a series of novel pyrimidine-carbazole emitters and their photophysical characterization in view of effects of substituents in the pyrimidine ring on their TADF properties. We demonstrate that electron-withdrawing substituents directly connected to the pyrimidine unit have greater impact on the lowering of the energy gap between singlet and triplet states (Δ E (Copyright © 2022, Fiodorova et al.) |
| Databáze: | MEDLINE |
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