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首页> 外文期刊>Magnetic Resonance in Chemistry: MRC >Reorientational dynamics of glycerol derived from temperature-dependent multi-nuclear magnetic resonance relaxation data
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Reorientational dynamics of glycerol derived from temperature-dependent multi-nuclear magnetic resonance relaxation data

机译：由温度依赖性多核磁共振弛豫数据得出的甘油的重整动力学

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Longitudinal H-1, H-2 and C-13 relaxation rates of [H-1(8)]glycerol and [H-2(8)]glycerol have been recorded at 250.13 MHz, 38.27 MHz and 62.89 MHz respectively, over the temperature range 260 to 350 K. In addition, the nuclear Overhauser enhancement factors of C-13 nuclei were recorded, since they depend only on the reorientational dynamics. It proved possible to fit all experimental data to a Cole-Davidson model extended by the Vogel-Fulcher-Tammann temperature dependence and the Lipari-Szabo libration parameter. Separate parameters were obtained for the inner CH and the outer CH2 groups. The overall picture of glycerol is one of a hydrogen-bonded liquid, where the outer CH2 groups perform fast librational motions whereas the inner CH group is rigidly fixed. Copyright (C) 2003 John Wiley Sons, Ltd. [References: 28]
机译：[H-1（8）]甘油和[H-2（8）]甘油的纵向H-1，H-2和C-13弛豫率已分别记录在250.13 MHz，38.27 MHz和62.89 MHz上。温度范围为260至350K。此外，记录了C-13核的核Overhauser增强因子，因为它们仅取决于方向性动力学。证明有可能将所有实验数据拟合到由Vogel-Fulcher-Tammann温度依赖性和Lipari-Szabo释放参数扩展的Cole-Davidson模型。获得了内部CH和外部CH2组的单独参数。甘油的整体情况是一种氢键液体，其中外部CH2基团执行快速的自由运动，而内部CH基团被牢固地固定。版权所有（C）2003 John Wiley Sons，Ltd. [引用：28]

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