MOLECULAR-DYNAMICS IN POLYCRYSTALLINE TESTOSTERONE STUDIED BY PROTON NMR

被引：28

作者：

ANDREW, ER ^{[1
]}

RADOMSKI, JM ^{[1
]}

机构：

[1] UNIV FLORIDA,DEPT RADIOL,GAINESVILLE,FL 32611

来源：

SOLID STATE NUCLEAR MAGNETIC RESONANCE | 1993年 / 2卷 / 1-2期

关键词：

TESTOSTERONE; PROTON NMR; RELAXATION; MOLECULAR DYNAMICS; METHYL ROTATION;

D O I：

10.1016/0926-2040(93)90063-S

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polycrystalline testosterone (17beta-hydroxy-4-androsten-3-one, C19H28O2) has been investigated by proton NMR methods between 70 K and the melting point 428 K. Reductions in dipolar second moment and two well-resolved minima in the spin-lattice relaxation time measured at 25 MHz are ascribed to reorientation of the two methyl groups in the molecule. Activation energies E(a) characterizing the motions were 6.1+/-0.5 and 11.9+/-0.9 kJ/mol; the pre-exponential time factors tau0 were (2.3+/-0.1)x10(-13) and (2.85+/-0.2)x10(-13) s, respectively.

引用

页码：57 / 60

页数：4

共 16 条

[1] ABRAGAM A, 1961, PRINCIPLES NUCLEAR M, pCH8
[2] Proton relaxation NMR study of polycrystalline progesterone
Andrew, E. R.
Jurga, K.
Radomski, J. M.
Reynhardt, E. C.
[J]. SOLID STATE NUCLEAR MAGNETIC RESONANCE, 1992, 1 (03) : 121 - 125
[3] Andrew E.R., 1977, MOL PHYS, V34, P1965
[4] NMR-STUDY OF SOLID CHOLESTEROL
ANDREW, ER
PEPLINSKA, B
[J]. MOLECULAR PHYSICS, 1990, 70 (03) : 505 - 512
[5] ANDREW ER, 1989, 10TH P ISMAR M
[6] ANDREW ER, 1955, NUCLEAR MAGNETIC RES
[7] RELAXATION EFFECTS IN NUCLEAR MAGNETIC RESONANCE ABSORPTION
BLOEMBERGEN, N
PURCELL, EM
POUND, RV
[J]. PHYSICAL REVIEW, 1948, 73 (07): : 679 - 712
[8] ON THE INTERACTION OF NUCLEAR SPINS IN A CRYSTALLINE LATTICE
BLOEMBERGEN, N
[J]. PHYSICA, 1949, 15 (3-4): : 386 - 426
[9] GUTOWSKY HS, 1950, J CHEM PHYS, V18, P163
[10] A GENERAL THEORY OF MAGNETIC RESONANCE ABSORPTION
KUBO, R
TOMITA, K
[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1954, 9 (06) : 888 - 919

← 1 2 →