Molecular dynamics in comb-like ionene as studied by NMR

• DOI: 10.1007/bf03162099
• Publication Date: 2009-09-16T15:39:04Z
• Authors: M. Makrocka-Rydzyk; S. Glowinkowski; S. Jurga; W. H. Meyer
• Keywords: Solid-state physics; Dynamics

Proton and fluorine second moment and spin-lattice relaxation timesT1 andTlρ have been employed to study molecular dynamics in the comb-like I-6,6-16-Me-BF4 ionene in the temperature range from 110 up to 300 K. The existence of motions of methyl groups, trans-gauche isomerization, and/or rotation of the main- and side-chain methylene groups, as well as isotropic reorientation of tetrafluoroborate ions were established. The observed relaxation behaviors are explained by motional models which assume Davidson-Cole asymmetrical distribution of correlation times. The best-fit motional parameters are given.