The inverted singlet-triplet gap: a vanishing myth?
Molecules with an inverted singlet-triplet gap (STG) between the first excited singlet and triplet states, for example, heptazine, have recently been reported and gained substantial attention since they violate the famous Hund’s rule. Utilizing state-of-the-art high-level ab initio methods, the sing...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2023
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| In: |
Frontiers in Chemistry
Year: 2023, Volume: 11, Pages: 1-8 |
| ISSN: | 2296-2646 |
| DOI: | 10.3389/fchem.2023.1239604 |
| Online Access: | Verlag, kostenfrei, Volltext: https://dx.doi.org/10.3389/fchem.2023.1239604 Verlag, kostenfrei, Volltext: https://www.frontiersin.org/articles/10.3389/fchem.2023.1239604 
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| Author Notes: | Andreas Dreuw and Marvin Hoffmann |
| Summary: | Molecules with an inverted singlet-triplet gap (STG) between the first excited singlet and triplet states, for example, heptazine, have recently been reported and gained substantial attention since they violate the famous Hund’s rule. Utilizing state-of-the-art high-level ab initio methods, the singlet-triplet gap vanishes and approaches zero from below whatever is improved in the theoretical description of the molecules: the basis set or the level of electron correlation. Seemingly, the phenomenon of inverted singlet-triplet gaps tends to vanish the closer we observe. |
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| Item Description: | Veröffentlicht: 27. Juli 2023 Gesehen am 25.09.2023 |
| Physical Description: | Online Resource |
| ISSN: | 2296-2646 |
| DOI: | 10.3389/fchem.2023.1239604 |