Antiferromagnetic ordering based on intermolecular London dispersion interactions in amphiphilic TEMPO ammonium salts. Issue 46 (19th November 2018)

• Record Type: Journal Article
• Authors: Exner, Jessica; Eusterwiemann, Steffen; Janka, Oliver; Doerenkamp, Carsten; Massolle, Anja; Niehaus, Oliver; Daniliuc, Constantin G.; Pöttgen, Rainer; Neugebauer, Johannes; Studer, Armido; Eckert, Hellmut
• Is Part Of: Physical chemistry chemical physics. Volume 20:Issue 46(2018)
• Page Start: 28979
• Page End: 28983
• Publication Date: 2018-11-19
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c8cp05837g
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Intermolecular London dispersion interactions between aliphatic chains can promote antiferromagnetic coupling in amphiphilic nitroxide radical ion salts. Abstract : 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.