ArticleACS central science2024
Optically Distinguishable Electronic Spin-isomers of a Stable Organic Diradical.
Article in ACS central science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Article
- Through-space donor-acceptor homoconjugation strategies for emissive radical species.Chemical science · 2026Article
- Unsymmetrical β-Fused Blatter Radical Zinc Phthalocyanines.Chemistry (Weinheim an der Bergstrasse, Germany) · 2026Article
- Ion-Pairing-Modulated Diradical Properties in Partially Conjugated Negatively Charged π-Electronic Systems.Chemistry (Weinheim an der Bergstrasse, Germany) · 2025Article
- Luminescent Trityl-based Diradicaloids: A Theoretical and Experimental Assessment of Charge-Resonance in Low-Lying Excited States.Chemistry (Weinheim an der Bergstrasse, Germany) · 2025Article
- Enhancing the Optically Detected Magnetic Resonance Signal of Organic Molecular Qubits.ACS central science · 2025Article
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Authors and funding
4 authors.
Funding
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Abstract
Herein, we introduce a model of electronic spin isomers, the electronic counterpart of nuclear spin isomers, by using a stable organic diradical. The diradical, composed of two benzotriazinyl radicals connected by a rigid triptycene skeleton, exhibits a small singlet-triplet energy gap of -3.0 kJ/mol, indicating ca. 1:1 coexistence of the two spin states at room temperature. The diradical shows characteristic near-IR absorption bands, which are absent in the corresponding monoradical subunit. Variable temperature measurements revealed that the absorbance of the NIR band depends on the abundance of the singlet state, allowing us to identify the NIR band as the singlet-specific absorption band. It enables photoexcitation of one of the two spin states coexisting in thermal equilibrium. Transient absorption spectroscopy disclosed that the two spin states independently follow qualitatively different excited-state dynamics. These results demonstrate a novel approach to the design and study of electronic spin isomers based on organic diradicals.
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Registered trials
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