Related Experiment Videos
Molecular dynamics in solid anhydrous beta-estradiol studied by 1H NMR
E R Andrew1, M Kempka, J M Radomski
1Department of Physics, University of Florida, Gainesville, 32611, USA.
Solid State Nuclear Magnetic Resonance
|August 7, 1999
Abstract:
Proton second moment and spin-lattice relaxation times T1 and T1p in solid anhydrous beta-estradiol are measured as a function of temperature. The results show that the C3 reorientation of the single methyl group provides the mechanism dominating relaxation at low temperatures and reveal the existence of a conformational motion of the carbon skeleton dominating relaxation at high temperatures. The activation energies of the respective motions are found to be 9.3 and 37.3 kJ/mol.