Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/124314
Title: | Paramagnetic spherical nanoparticles by the self-assembly of persistent trityl radicals |
Author: | Marín Montesinos, Ildefonso Paniagua, Juan Carlos Peman, Alejandro Vilaseca Casas, Marta Luis Vitalla, Fernando Van Doorslaer, S. Pons Vallès, Miquel |
Keywords: | Química supramolecular Materials magnètics Supramolecular chemistry Magnetic materials |
Issue Date: | 18-Jan-2016 |
Publisher: | Royal Society of Chemistry |
Abstract: | 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. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1039/c5cp05767a |
It is part of: | Physical Chemistry Chemical Physics, 2016, vol. 18, num. 4, p. 3151-3158 |
URI: | http://hdl.handle.net/2445/124314 |
Related resource: | https://doi.org/10.1039/c5cp05767a |
ISSN: | 1463-9076 |
Appears in Collections: | Articles publicats en revistes (Química Inorgànica i Orgànica) |
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