Antiferromagnetic ordering based on intermolecular London dispersion interactions in amphiphilic TEMPO ammonium salts

Antiferromagnetic coupling in TEMPO-based radicals can be enhanced via self-assembly through London dispersion interactions in amphiphilic solids. The synthesis, magnetic characterization, and three crystal structures of the solid radical ion salts (R-DMAT-n)X with various counterions X and alkyl ch...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2018-11, Vol.20 (46), p.28979-28983
Main Authors: Exner, Jessica, Eusterwiemann, Steffen, Janka, Oliver, Doerenkamp, Carsten, Massolle, Anja, Niehaus, Oliver, Daniliuc, Constantin G, Pöttgen, Rainer, Neugebauer, Johannes, Studer, Armido, Eckert, Hellmut
Format: Article
Language:English
Subjects:
Antiferromagnetism
Chains
Chemical synthesis
Crystal structure
Crystallography
Crystals
Dispersion
Magnetic permeability
Magnetic properties
Organic chemistry
Quantum chemistry
Self-assembly
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Summary:Antiferromagnetic coupling in TEMPO-based radicals can be enhanced via self-assembly through London dispersion interactions in amphiphilic solids. The synthesis, magnetic characterization, and three crystal structures of the solid radical ion salts (R-DMAT-n)X with various counterions X and alkyl chain lengths n are reported. Magnetic susceptibility and absolute EPR signal intensity measurements show singlet-triplet transitions in a number of cases, which is discussed in relation to the crystal structures. Antiferromagnetic ordering effects are sensitive to both the length of the alkyl chain and the counter anion.
ISSN:1463-9076
1463-9084
DOI:10.1039/c8cp05837g