Enhanced diffusion of molecular catalysts is due to convection.
Enhanced diffusion of molecular catalysts is due to convection.
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分子催化剂的扩散增强是由于对流。
DOI：
10.26434/chemrxiv.8259317.v1
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发表时间：
2019
影响因子：
--
通讯作者：
Jonathon E. Beves
中科院分区：
文献类型：
--
作者：
Thomas Macdonald;William S. Price;R. Astumian;Jonathon E. Beves
在酶和分子催化剂中增强扩散的有趣报告激发了人们对这一现象的实验和理论研究的极大兴趣，机械理解是正在进行的热烈辩论的主题。在这里，我们使用时间分辨扩散NMR方法来测量小分子物种的扩散系数与高时间分辨率的化学反应。我们发现，小分子的增强扩散不能用反应速度来解释，并且小分子的增强扩散的明显测量似乎是由体相流体流动过程如对流引起的。
Intriguing reports of enhanced diffusion in enzymes and molecular catalysts have spurred significant interest in experimental and theoretical investigations of this phenomenon, with mechanistic understanding the subject of ongoing and lively debate. Here we use time-resolved diffusion NMR methods to measure the diffusion coefficients of small molecule species involved in chemical reactions with high temporal resolution. We show the enhanced diffusion of small molecules cannot be explained by reaction velocity, and that apparent measurements of enhanced diffusion by small molecules appear to be caused by bulk fluid flow processes such as convection.
影响因子：
15
作者：
Muddana, Hari S.;Sengupta, Samudra;Mallouk, Thomas E.;Sen, Ayusman;Butler, Peter J.
通讯作者：
Butler, Peter J.
影响因子：
2.4
作者：
Ebbens, Stephen;Tu, Mei-Hsien;Golestanian, Ramin
通讯作者：
Golestanian, Ramin