6533b85ffe1ef96bd12c1136
RESEARCH PRODUCT
Slow and fast methyl group rotations in fragile glass-formers studied by NMR
Herbert ZimmermannRoland BöhmerHans SillescuGerald HinzeF. Qisubject
Inorganic chemistryRelaxation (NMR)Primary responseGeneral Physics and AstronomyRing (chemistry)Toluene530Condensed Matter::Disordered Systems and Neural NetworksCondensed Matter::Soft Condensed MatterCrystallographychemistry.chemical_compoundchemistryDeuteriumGroup (periodic table)Propylene carbonatePhysical and Theoretical ChemistryPhysics::Chemical PhysicsMethyl groupdescription
Abstract The spin-lattice relaxation times of the selectively ring deuterated, fragile glass-formers propylene carbonate and toluene were compared with those measured for species which were specifically labeled at the methyl groups. It was found that the dynamics of the CD 3 group is strongly decoupled from that associated with the primary response of toluene, while for propylene carbonate the degree of decoupling is relatively weak. The experimental results could be described successfully using a model which takes into account the ring dynamics as well as those of the methyl group.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-09-29 |