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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >The effect of central and planar chirality on the electrochemical and chiral sensing properties of ferrocenyl urea H-bonding receptors
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The effect of central and planar chirality on the electrochemical and chiral sensing properties of ferrocenyl urea H-bonding receptors

机译:中心和平面手性对二茂铁基脲H键受体的电化学和手性传感特性的影响

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摘要

A new series of chiral ureas containing one or two redox-active ferrocene units was synthesised and studied in order to investigate the effect of planar chirality and central chirality on electrochemical chiral sensing. Binding of chiral carboxylate anions in organic solvents through H-bond formation caused a negative shift in the potentials of the ferrocene/ferrocenium (Fc/Fc(+)) couples of the receptors, demonstrating their use as electrochemical sensors in solution. While the presence of two ferrocene units gave no marked improvement in the chiral sensing capabilities of these systems, the introduction of planar chirality, in addition to central chirality, switched the enantiomeric binding preference of the system and also caused an interesting change in the appearance of some voltammograms, with unusual two-wave behaviour observed upon binding a protected prolinate guest.
机译:为了研究平面手性和中心手性对电化学手性传感的影响,合成并研究了一系列含有一个或两个氧化还原活性二茂铁单元的新手性脲。通过H键形成有机溶剂中的手性羧酸根阴离子的结合导致受体的二茂铁/二茂铁鎓(Fc / Fc(+))对的电势发生负移,证明了它们在溶液中用作电化学传感器。尽管两个二茂铁单元的存在并未使这些系统的手性感应能力得到显着改善,但平面性手性的引入,除了中心手性之外,还改变了系统的对映体结合偏好,并且还引起了对映体的有趣变化。一些伏安图,在结合受保护的pro状客人时观察到异常的两波行为。

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