评论“常见化学反应中分子迁移率的增强”。
Comment on "Boosted molecular mobility during common chemical reactions".
机构信息
Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany.
Institute of Physical Chemistry, University of Stuttgart, 70569 Stuttgart, Germany.
出版信息
Science. 2021 Jan 15;371(6526). doi: 10.1126/science.abe8322.
The apparent "boosted mobility" observed by Wang (Reports, 31 July 2020, p. 537) is the result of a known artifact. When signal intensities are changing during a nuclear magnetic resonance (NMR) diffusion measurement for reasons other than diffusion, the use of monotonically increasing gradient amplitudes produces erroneous diffusion coefficients. We show that no boosted molecular mobility is observed when shuffled gradient amplitudes are applied.
Wang （报道，2020 年 7 月 31 日，第 537 页）观察到的明显“增强的迁移率”是一种已知伪影的结果。当由于扩散以外的原因导致磁共振（NMR）扩散测量中的信号强度发生变化时，使用单调递增的梯度幅度会产生错误的扩散系数。我们表明，当应用随机梯度幅度时，不会观察到增强的分子迁移率。
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