引用本文:
王德华, Levy, George C.. 用自旋-晶格弛豫时间T1研究吗啡的不对称旋转和甲基内旋转速度[J]. 物理化学学报,
1989, 5(01): 10-14.
doi:
10.3866/PKU.WHXB19890104
Citation: Wang Dehua, George C.. Analysis of Axially Symmetric Molecular Tumbling and Methyl Internal Rotation Rates of Morphine by 13C Spin-Lattice Relaxation Time T1[J]. Acta Physico-Chimica Sinica, 1989, 5(01): 10-14. doi: 10.3866/PKU.WHXB19890104
Citation: Wang Dehua, George C.. Analysis of Axially Symmetric Molecular Tumbling and Methyl Internal Rotation Rates of Morphine by 13C Spin-Lattice Relaxation Time T1[J]. Acta Physico-Chimica Sinica, 1989, 5(01): 10-14. doi: 10.3866/PKU.WHXB19890104
用自旋-晶格弛豫时间T1研究吗啡的不对称旋转和甲基内旋转速度
摘要:
在~(13)C 90.1和62.9MHz观察频率下测定了吗啡(morphine)分子在溶液中的核弛豫参数。用分子不对称旋转模型算得吗啡分子绕X轴的旋转速度为8.6×10~9周秒~(-1),绕Y轴的旋转速度为6.1×10~9周秒~(-1)。NCH_3中甲基的内旋转速度为5.7×10~9周秒~(-1),内旋转位垒为4.59 kcal mol~(-1)。
English
Analysis of Axially Symmetric Molecular Tumbling and Methyl Internal Rotation Rates of Morphine by 13C Spin-Lattice Relaxation Time T1
Abstract:
~(13)C relaxation parameters of morphine in solution were measured at 90.1 and 62.9 MHz. An axially symmetric rotational model was applied to calculate the ro- tational rates.The calculated rotational rates are 8.6×10~9 revolution s~(-1) about the principal X-axis and 6.1×10~9 revolution s~(-1) about Y-axis.The N-CH_3 methyl internal rotation rate is 5.7×10~9 revolution s~(-1) and the internal rotation barrier is 4.59 kcal mo1~(-1).
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