wizyta

od 2020-09-20

Title: Molecular dynamics in comb-like ionene as studied by NMR

Source: Applied Magnetic Resonance

Year : 2000

Abstract:

Proton and fluorine second moment and spin-lattice relaxation times T-1 and T-1p have been employed to study molecular dynamics in the comb-like 1-6,6-16-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 rimes. The best-fit motional parameters are given.

DOI: 10.1007/BF03162099   (Pobrane:  aktualizowanie)