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Proton NMR study on the molecular dynamics of solid porphine-d2

✍ Scribed by Frydman, Lucio; Rossomando, Pedro C.; Sambrotta, Luis; Frydman, Benjamin


Book ID
121872060
Publisher
American Chemical Society
Year
1992
Tongue
English
Weight
423 KB
Volume
96
Category
Article
ISSN
0022-3654

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πŸ“œ SIMILAR VOLUMES


Proton NMR study of molecular motion in
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Polycrystalline cortisone (17,21-dihydroxy-4-pregnene-3,11,20\_trione, C,,H2s0,) has been investigated by proton NMR methods between 56 and 400 K at 14 and 25 MHz. Reductions in second moment and two very well-resolved minima in the spin-lattice relaxation time at both frequencies are attributed to

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Proton Zcoman-and dipolar spin-lattice rekxation times and second moments have been measured in polycrystallinc SiH4 at 24 %IHz, between 90 and 3 K. Down to 25 K the classical model for molecular motion appibs; below 25 EC, quantum effects have to be taken into account.