Covalent modification of glassy carbon surfaces by using electrochemical and solid-phase synthetic methodologies: application to bi- and trifunctionalisation with different redox centres.

Covalent modification of glassy carbon surfaces by using electrochemical and solid-phase synthetic methodologies: application to bi- and trifunctionalisation with different redox centres.
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使用电化学和固相合成方法对玻璃碳表面进行共价修饰:应用于不同氧化还原中心的双官能化和三官能化。

DOI:
10.1002/chem.200901135
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发表时间:
2009
期刊:
Chemistry (Weinheim an der Bergstrasse, Germany)
影响因子:
--
通讯作者:
Chrétien JM
Chrétien JM
中科院分区:
--
文献类型:
--
作者:
Chrétien JM

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通过电化学和固相合成方法制备了具有两个氧化还原中心的玻璃碳电极。最初,通过使用不同的偶联剂和条件,蒽醌,硝基苯和二羟基苯的个别耦合到带有乙二胺连接体的玻碳电极进行了优化。然后进行双官能化,或者同时用硝基苯和二羟基苯的混合物,或者依次用蒽醌然后硝基苯和用蒽醌然后二羟基苯。通过循环伏安法和微分脉冲伏安法对这些电极进行表征,清楚地证明了氧化还原中心对与玻碳电极的连接。它们的部分表面覆盖率可以通过改变偶联剂或通过控制固相偶联过程中的底物浓度来控制。三官能化也实现了根据这种方法。
Glassy carbon electrodes functionalised with two redox centres have been prepared by using electrochemical and solid‐phase synthetic methodologies. Initially the individual coupling of anthraquinone, nitrobenzene and dihydroxybenzene to a glassy carbon electrode bearing an ethylenediamine linker was optimised by using different coupling agents and conditions. Bifunctionalisation was then carried out, either simultaneously, with a mixture of nitrobenzene and dihydroxybenzene, or sequentially, with anthraquinone then nitrobenzene and with anthraquinone then dihydroxybenzene. Characterisation of these electrodes by cyclic voltammetry and differential pulse voltammetry clearly proved the attachment of the pairs of redox centres to the glassy carbon electrode. Their partial surface coverages can be controlled by varying the coupling agent or by controlling the substrate concentration during the solid‐phase coupling process. Trifunctionalisation was also realised according to this methodology.
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