AI Article Synopsis
- - The study introduces novel TADF emitters using a unique 3D structure called dithia[3.3]-paracyclophane to enhance interactions between donor and acceptor molecules through their spatial arrangement.
- - This 3D platform enables researchers to closely examine how the orientation and distance between donor and acceptor units affect TADF emission properties.
- - Findings suggest that the dithia[3.3]paracyclophane core not only improves TADF emission efficiency but also shortens the time required for reverse intersystem crossing (RISC), enhancing the transition from charge transfer to locally excited states.
Article Abstract
Thermally activated delayed fluorescence (TADF) based on through-space donor and acceptor interactions constitute a recent and promising approach to develop efficient TADF emitters. Novel TADF isomers using a dithia[3.3]-paracyclophane building block as a versatile 3D platform to promote through-space interactions are presented. Such a 3D platform allows to bring together the D and A units into close proximity and to probe the effect of their orientation, contact site and distance on their TADF emission properties. This study provides evidence that the dithia[3.3]paracyclophane core is a promising platform to control intramolecular through-space interactions and obtain an efficient TADF emission with short reverse-intersystem crossing (RISC) lifetimes. In addition, this study demonstrates that this design can tune the energy levels of the triplet states and leads to an upconversion from CT to LE that promotes faster and more efficient RISC to the CT singlet state.
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| http://dx.doi.org/10.1002/asia.201900401 | DOI Listing |
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