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2016-01-18

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/124314

Paramagnetic spherical nanoparticles by the self-assembly of persistent trityl radicals

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Recurs relacionat

https://doi.org/10.1039/c5cp05767a

Resum

Spherical nanoparticles and fibres observable by cryo-electron microscopy are spontaneously formed by the Finland trityl radical at concentrations above 15 mM. These species represent a new class of paramagnetic, metal-free, nanoscale supramolecular materials. Self-association was observed under a variety of experimental conditions, including aqueous solution at room temperature, low temperature frozen glasses and the gas phase. Oligomers formed by at least 5 Finland radicals were detected by ion-mobility mass spectrometry. Magnetic susceptibility data as well as low temperature EPR spectra show coupling between electronic spins in the self-assembled species. Quantum chemical calculations show stacking along the C3 symmetry axis. Nanoparticle formation requires additional lateral packing that can be provided by bydrogen bonding involving the triangular array of carboxylic acid groups leading to the assembly of geodesic spheres.

Matèries

Química supramolecular, Materials magnètics

Matèries (anglès)

Supramolecular chemistry, Magnetic materials

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Articles publicats en revistes (Química Inorgànica i Orgànica)

Citació

MARÍN MONTESINOS, Ildefonso, et al. Paramagnetic spherical nanoparticles by the self-assembly of persistent trityl radicals. Physical Chemistry Chemical Physics. 2016. Vol. 18, num. 4, pags. 3151-3158. ISSN 1463-9076. [consulted: 27 of August of 2026]. Available at: https://hdl.handle.net/2445/124314

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