期刊
COMMUNICATIONS CHEMISTRY
卷 1, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s42004-018-0096-x
关键词
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资金
- French National Research Agency [ANR-13-JSV5-0006-01]
- Deutsche Forschungsgemeinschaft [ME 1535/6-1]
- Foundation for Polish Science within a Humboldt Polish Honorary Research Scholarship
- Deutsche Forschungsgemeinschaft (German Research Foundation)
- Open Access Publication Fund of Potsdam University
Textbook concepts of diffusion-versus kinetic-control are well-defined for reaction-kinetics involving macroscopic concentrations of diffusive reactants that are adequately described by rate-constants-the inverse of the mean-first-passage-time to the reaction-event. In contradiction, an open important question is whether the mean-first-passage-time alone is a sufficient measure for biochemical reactions that involve nanomolar reactant concentrations. Here, using a simple yet generic, exactly solvable model we study the effect of diffusion and chemical reaction-limitations on the full reaction-time distribution. We show that it has a complex structure with four distinct regimes delineated by three characteristic time scales spanning a window of several decades. Consequently, the reaction-times are defocused: no unique time-scale characterises the reaction-process, diffusion-and kinetic-control can no longer be disentangled, and it is imperative to know the full reaction-time distribution. We introduce the concepts of geometry-and reaction-control, and also quantify each regime by calculating the corresponding reaction depth.
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