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Probing the General Time Scale Question of Boronic Acid Binding with Sugars in Aqueous Solution at Physiological pH

机译:在生理pH下水溶液中糖酸结合的一般时间尺度问题探讨

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摘要

The boronic acid group is widely used in chemosensor design due to its ability to reversibly bind diol-containing compounds. The thermodynamic properties of the boronic acid-diol binding process have been investigated extensively. However, there are few studies of the kinetic properties of such binding processes. In this report, stopped-flow method was used for the first time to study the kinetic properties of the binding between three model arylboronic acids, 4-, 5-, and 8-isoquinolinylboronic acids, and various sugars. With all the boronic acid-diol pair sexamined, reactions were complete within seconds. The kon values with various sugars follow the order of D-fructose >D-tagatose>D-mannose >D-glucose. This trend tracks the thermodynamic binding affinities for these sugars and demonstrates that the “on” rate is the key factor determining the binding constant.
机译:由于其可逆含有二醇的化合物,硼酸基团广泛用于化学传感器设计。已经广泛研究了硼酸二醇结合过程的热力学性质。然而,少数关于这种结合过程的动力学性质的研究。在本报告中,第一次使用停止流动方法来研究三种模型芳基硼酸,4-,5-和8-异喹啉基硼酸和各种糖之间的结合的动力学性质。随着所有硼酸二醇对性感,反应在几秒钟内完成。具有各种糖的镰刀值遵循D-果糖> D-Tagatose> D-甘露糖> D-葡萄糖的顺序。该趋势跟踪这些糖的热力学结合亲和力,并表明“ON”速率是确定结合常数的关键因素。

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