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

Author(s):Show less -

Exner, Jessica ^[1] ; Eusterwiemann, Steffen ^[1] ; Janka, Oliver ^[2] ; Doerenkamp, Carsten ^{[3, 4]} ; Massolle, Anja ^{[1, 5]} ; Niehaus, Oliver ^[2] ; Daniliuc, Constantin G. ^[1] ; Poettgen, Rainer ^[2] ; Neugebauer, Johannes ^{[1, 5]} ; Studer, Armido ^[1] ; Eckert, Hellmut ^{[3, 4]}

Affiliation

^[1] Westfalische Wilhelms Univ Munster, Inst Organ Chem, Corrensstr 40, D-48149 Munster - Germany

^[2] Westfalische Wilhelms Univ Munster, Inst Anorgan & Analyt Chem, Corrensstr 30, D-48149 Munster - Germany

^[3] Westfalische Wilhelms Univ Munster, Inst Phys Chem, Corrensstr 28-30, D-48149 Munster - Germany

^[4] Univ Sao Paulo, Sao Carlos Inst Phys, Av Trab Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil

^[5] Ctr Multiscale Theory & Computat, Corrensstr 40, D-48149 Munster - Germany

• Document type: Journal article
• Source: Physical Chemistry Chemical Physics; v. 20, n. 46, p. 28979-28983, DEC 14 2018.
• Web of Science Citations: 0

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. (AU)

• FAPESP's process: 17/06649-0 - New Optical Materials based on Rare-Earth Doped Oxyfluoride Glasses and Ceramics: Structural Studies by Electron Paramagnetic Resonance Methods
• Grantee: Carsten Doerenkamp
• Support Opportunities: Scholarships in Brazil - Post-Doctoral