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RESEARCH PRODUCT
1H NMR, DSC, dielectric, and dilatometric studies of phase transitions and molecular dynamics in N (C2H5)4SbCl4
Ryszard JakubasWojciech MedyckiN. PiślewskiJacek Zaleskisubject
CrystalPhase transitionNuclear magnetic resonanceChemistryRelaxation (NMR)Spin–lattice relaxationProton NMRPhysical chemistryActivation energyDielectricAtmospheric temperature rangeCondensed Matter PhysicsElectronic Optical and Magnetic Materialsdescription
The results of dielectric, dilatometric, 1H NMR, and DSC studies on N(C2H5)4SbCl4 crystals are presented. The title compound undergoes two phase transitions at Tc1 = 272 K reversible of first order and at Tc2 = 393 K irreversible. The values of transition entropies and enthalpies are compared with those of other tetraethylammonium halogenoantimonates and bismuthates (III). The spin-lattice relaxation times and the values of the second moments of the 1H NMR line for the N(C2H5)4SbCl4 crystal are measured in the temperature range of 70 to 400 K. Two minima of T1 are observed. They are attributed to CH3 group reorientations. The activation energies for the processes are determined.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-07-16 | Physica Status Solidi (a) |