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Title
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Paramagnetic spherical nanoparticles by the self-assembly of persistent trityl radicals
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Author
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Abstract
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| 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 C-3 symmetry axis. Nanoparticle formation requires additional lateral packing that can be provided by hydrogen bonding involving the triangular array of carboxylic acid groups leading to the assembly of geodesic spheres. |
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Language
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English
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Source (journal)
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Physical chemistry, chemical physics / Royal Society of Chemistry [London] - Cambridge, 1999, currens
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Publication
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Cambridge
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The Royal Society of Chemistry
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2016
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ISSN
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1463-9076
[print]
1463-9084
[online]
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DOI
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10.1039/C5CP05767A
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Volume/pages
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18
:4
(2016)
, p. 3151-3158
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ISI
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000369506000096
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Pubmed ID
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26742686
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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