AI Article Synopsis
- The study highlights the discovery of singlet-triplet (ST) inversion in certain triangle-shaped boron carbon nitrides, challenging Hund's first rule caused by strong electron-electron interactions.
- This ST inversion has significant implications for improving triplet harvesting in organic LEDs, making it a noteworthy advancement in the field.
- The research utilizes the Pariser-Parr-Pople model combined with advanced calculations to show that the ST inversion is mainly influenced by the arrangement of electron-donor and electron-acceptor groups around the molecular edge, rather than the shape of the triangles themselves.
Article Abstract
The discovery of singlet-triplet (ST) inversion in some π-conjugated triangle-shaped boron carbon nitrides is a remarkable breakthrough that defies Hund's first rule. Deeply rooted in strong electron-electron interactions, ST inversion has garnered significant interest due to its potential to revolutionize triplet harvesting in organic LEDs. Using the well-established Pariser-Parr-Pople model for correlated electrons in π-conjugated systems, we employ a combination of CISDT and restricted active space configuration interaction calculations to investigate the photophysics of several triangular boron carbon nitrides. Our findings reveal that ST inversion in these systems is primarily driven by a network of alternating electron-donor and electron-acceptor groups in the molecular rim, rather than by the triangular molecular structure itself.
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| http://dx.doi.org/10.1021/acs.jctc.4c00706 | DOI Listing |
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