A5029016829- Magnetism in coordination complexes
- Crystallization and Solubility Studies
- Electron Spin Resonance Studies
- X-ray Diffraction in Crystallography
- Porphyrin and Phthalocyanine Chemistry
- Synthesis and Properties of Aromatic Compounds
- Advanced NMR Techniques and Applications
- Molecular Junctions and Nanostructures
- Lanthanide and Transition Metal Complexes
- Advanced Chemical Physics Studies
- Quantum and electron transport phenomena
- Luminescence and Fluorescent Materials
- Fluorine in Organic Chemistry
- Graphene research and applications
- Photochemistry and Electron Transfer Studies
- Spectroscopy and Quantum Chemical Studies
- Carbon Nanotubes in Composites
- Fullerene Chemistry and Applications
- Diamond and Carbon-based Materials Research
University of Oxford
2019-2023
Robustly coherent spin centers that can be integrated into devices are a key ingredient of quantum technologies. Vacancies in semiconductors excellent candidates, and theory predicts defects conjugated carbon materials should also display long coherence times. However, the performance nanostructures has remained stunted by an inability to alter sp2-carbon lattice with atomic precision. Here, we demonstrate topological tailoring leads superior molecular graphene nanostructures. We unravel...
Open-shell non-alternant polycyclic hydrocarbons (PHs) are attracting increasing attention due to their promising applications in organic spintronics and quantum computing. Herein we report the synthesis of three cyclohepta[def]fluorene-based diradicaloids (1-3), by fusion benzo rings on its periphery for thermodynamic stabilization, as evidenced multiple characterization techniques. Remarkably, all them display a very narrow optical energy gap (E
Vanadium(IV) magnetic centers are prime candidates for molecular quantum units. One long-standing question is how to obtain a scaffold that connects multiple and allows two communication modalities: electronic. We have synthesized studied selection of vanadyl porphyrin dimers as models the most synthetically accessible linear arrays. show strongly π-conjugated backbone places system in an intermediate regime dominated by exchange coupling (J) protects coherence against electron pair...
We investigate the mechanisms of nuclear decoupling in synthetically tailored graphenoids, where electron spin state is introduced by topological manipulation lattice. compare molecular graphenoids containing one and two centers, pentagonal rings honeycomb Exploiting nature systems, we role different species environments. Variations on Carr-Purcell-Meiboom-Gill pulse trains are used to prolong coherence time radicaloids, leading substantial improvements performance times up 300...
Abstract Open‐shell non‐alternant polycyclic hydrocarbons (PHs) are attracting increasing attention due to their promising applications in organic spintronics and quantum computing. Herein we report the synthesis of three cyclohepta[ def ]fluorene‐based diradicaloids ( 1 – 3 ), by fusion benzo rings on its periphery for thermodynamic stabilization, as evidenced multiple characterization techniques. Remarkably, all them display a very narrow optical energy gap E g opt =0.52–0.69 eV)...
Vanadium(IV) magnetic centers are prime candidates as molecular quantum information units. One of the longstanding problems is to obtain an extendable scaffold that transmits interaction a degree usable for processing, and allows upscaling multiple centers, while preserving sufficiently long coherence time. Here, we show fused porphyrins allow tailored scaffolding vanadyl units, with almost flat conjugated π-system offers substantial advantages communication between ions, leading...
We explore the usage of pulse sequence optimization to boost quantum properties topological defects in molecular graphenoids at high temperatures. reach spin-lattice relaxation times on same order as those best devices literature, $\ensuremath{\sim}1$ ms room temperature. The coherence time is shown be heavily affected by hyperfine interaction and concentration hydrogen atoms particular. test compare applicability performance different decoupling sequences enhancing coherence, identifying...
Vanadium(IV) magnetic centers are prime candidates as molecular quantum units. One longstanding question is how to obtain a scaffold that connects multiple and allows two communication modalities: electronic. We have synthesized studied selection of vanadyl porphyrin dimers, models the most synthetically accessible linear arrays. show strongly π-conjugated backbone places system in strong coupling regime protects coherence against electron pair flip-flop processes at low temperatures (<10...