wizyta

od 2020-09-20

Title: Molecular dynamics in solid anhydrous beta-estradiol studied by 1H NMR

Source: Solid State Nuclear Magnetic Resonance

Year : 1999

Abstract:

Proton second moment and spin-lattice relaxation times T-1 and T-1p in solid anhydrous beta-estradiol are measured as a function of temperature. The results show that the C-3 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 kT/mol.
(C) 1999 Elsevier Science B.V. All rights reserved.

DOI: 10.1016/S0926-2040(99)00009-0   (Pobrane:  2020-10-21)