溶液中单个化学反应的观察。

Observation of individual chemical reactions in solution.

作者信息

Collinson M M, Wightman R M

出版信息

Science. 1995 Jun 30;268(5219):1883-5. doi: 10.1126/science.268.5219.1883.

DOI:10.1126/science.268.5219.1883

Abstract

Discrete chemical reaction events occurring in solution have been observed by single photon detection of a bimolecular, chemiluminescent reaction. The reactants were generated from 9,10-diphenylanthracene in acetonitrile with potential pulses applied to an ultramicroelectrode. Electrogenerated radical ions of opposite sign react to yield the excited singlet state of the parent compound. The chemical reactions were restricted to a 20-femtoliter volume adjacent to the electrode by the use of rapid potential pulses. Individual chemical reaction events were stochastic and followed the Poisson distribution, and the interarrival time between successive reaction events was exponentially distributed.

摘要

通过对双分子化学发光反应进行单光子检测，观察到了溶液中发生的离散化学反应事件。反应物由9,10 - 二苯基蒽在乙腈中产生，并向超微电极施加电势脉冲。带相反电荷的电生成自由基离子反应生成母体化合物的激发单重态。通过使用快速电势脉冲，化学反应被限制在电极附近20飞升的体积内。单个化学反应事件是随机的，遵循泊松分布，连续反应事件之间的到达间隔时间呈指数分布。