核磁共振中多量子相干扩散行为的理论表述和计算机模拟 |
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摘 要: |
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Theoretical Expression and Computer Simulation of Diffusion Behaviors in Multiple-Quantum Coherence NMR |
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Authors: | Lin Qiaoling Cai Shuhui Chen Zhong Cai Congbo |
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Abstract: | Self-diffusion is one of the most fundamental motions of particles in liquid. Nuclear magnetic resonance (NMR)provides a convenient and noninvasive means for accurately measuring the self-diffusion coefficient of molecules in solution. The theoretical expressions of apparent diffusion rates of MQCs are given and computer simulation based on the method to measure the self-diffusion coefficient by NMR was discussed and the random walk model of particles is used to simulate the apparent diffusion behaviors of intra-molecular and inter-molecular multiple-quantum coherences(MQCs). The results of computer simulation agree well with theoretical predictions. |
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Keywords: | NMR,Diffusion,Multiple-quantum coherences |
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