The spin-lattice relaxation rates of the aromatic, alkene, hydroxyl, methine and methyl protons of 19 steroid derivatives have been measured using the null point method. A simple procedure is described whereby the Itl values of molecules which have different motional tumbling rates can be directly i
The cut-off effect of spin—lattice relaxation rates in OBPA
✍ Scribed by S.D. Goren; C. Korn; S.B. Marks
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 299 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The pIOtOIl Spin-iattice rekxation thne of OBPA @-octyloxybenzylidene p, N-propylanZne) bas been measured as a fúUCtiOU of the temperature at various frequenties. The frequency dependent portion of the relaxation rate is attributed to the fluctuation of the order parameter and a frequency cut-off effect was observed.
📜 SIMILAR VOLUMES
In the presence of an off-resonance radiofrequency field, recovery of longitudinal magnetization to a steady state is not purely monoexponential. Under reasonable conditions with zero initial magnetization, recovery is nearly exponential and an effective relaxation rate constant R(1eff) = 1/T(1eff)
for the triplet state of quinosdinc in durene and in pcrdeuterated naphthalene (Na'a) with the pulse uturation method. In the N-da host crystai rhe anisotropy is identical for both molecular orientations A and B.