ArticleNature chemistry2025
Bright triplet and bright charge-separated singlet excitons in organic diradicals enable optical read-out and writing of spin states.
Article in Nature chemistry, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed.
- Simultaneous enhancement of photoluminescence and spin-polarization lifetime in a carbazole-functionalized TTM diradical.Chemical science · 2026Article
- Air-Stable Luminescent Schlenk Diradical With Triplet Ground State.Angewandte Chemie (International ed. in English) · 2026Article
- Aethrene: A Stable Polycyclic Aromatic Hydrocarbon With a Triplet Ground State.Angewandte Chemie (International ed. in English) · 2026Article
- Ultrafast Spectroscopy in Chemistry.The journal of physical chemistry letters · 2026Article
- Circularly polarized electroluminescence from topologically chiral [2]catenane-based neutral radicals with tunable deep-red emission.Nature communications · 2026Article
- Optically detected nuclear magnetic resonance of coherent spins in a molecular complex.Nature materials · 2026Article
- Through-space donor-acceptor homoconjugation strategies for emissive radical species.Chemical science · 2026Article
- Backbone Engineering of Carbon-Centered NHC-Derived Diradicals: From Electronic State Tuning to High-Performance Organic Field-Effect Transistors.Advanced materials (Deerfield Beach, Fla.) · 2026Article
- Spin-Correlated Luminescence of Mechanically Generated Radical Species.Angewandte Chemie (International ed. in English) · 2026Article
- Carbon-based molecular qubits: a chemical pathway to ambient quantum technologies.National science review · 2026Article
- Spin Coupling in Symmetric and Asymmetric Allyl and Phenalenyl Diradicals Bridged by an Inverted Singlet-Triplet System.The journal of physical chemistry. A · 2026Article
- Spin-Dependent Photoluminescence in Carbon-Based Quantum Dots.Advanced materials (Deerfield Beach, Fla.) · 2026Article
- Spirofluorene-Bridged Through-Space Charge-Transfer Radicals with 1-Phenyl-1H-indole Donor.Molecules (Basel, Switzerland) · 2026Article
- Surveying optically addressable spin qubits for quantum information and sensing technology.npj quantum materials · 2026Review
- Optically addressable molecular spin qubits.MRS bulletin · 2026Review
- Optically Detected Magnetic Resonance on Carbene Molecular Qubits.Journal of the American Chemical Society · 2025Article
- Chemically Tuning Room Temperature Pulsed Optically Detected Magnetic Resonance.Journal of the American Chemical Society · 2025Article
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Authors and funding
22 authors.
Funding
Abstract
Optical control of electron spin states is important for quantum sensing and computing applications, as developed with the diamond nitrogen vacancy centre. This requires electronic excitations, excitons, with net spin. Here we report a molecular diradical where two trityl radical groups are coupled via a meta-linked fluorene bridge. The singlet exciton is at lower energy than the triplet because electron transfer from one of the radical non-bonding orbitals to the other is spin allowed, set by the charging energy for the double occupancy of the non-bonding level, the Hubbard U. Both excitons give efficient photoluminescence at 640 and 700 nm with near unity efficiency. The ground state exchange energy is low, 60 µeV, allowing control of ground state spin populations. We demonstrate spin-selective intersystem crossing and show coherent microwave control. We report up to 8% photoluminescence contrast at microwave resonance. This tuning of the singlet Mott-Hubbard exciton against the 'bandgap' exciton provides a new design platform for spin-optical materials.
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Registered trials
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