The apparent “boosted mobility” observed by Wang et al. (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.

中文翻译：

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评论“在常见化学反应中提高分子流动性”

Wang 等人 观察到的明显“增强的流动性”。（报告，2020 年 7 月 31 日，第 537 页）是已知人工制品的结果。当信号强度在核磁共振 (NMR) 扩散测量期间由于扩散以外的原因发生变化时，使用单调增加的梯度幅度会产生错误的扩散系数。我们表明，当应用混洗梯度幅度时，没有观察到分子迁移率的提高。