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首页> 外文期刊>Microchemical Journal: Devoted to the Application of Microtechniques in all Branches of Science >Preparation and characterization of a chemically modified electrode based on ferrocene-tethered beta-cyclodextrin self assembled monolayers
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Preparation and characterization of a chemically modified electrode based on ferrocene-tethered beta-cyclodextrin self assembled monolayers

机译:基于二茂铁束缚的β-环糊精自组装单分子膜的化学修饰电极的制备和表征

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摘要

We report the preparation and characterisation of a microcristalline An electrode chemically modified with a self-assembled monolayer (SAM) of a beta-cyclodextrin (beta-CD) derivative having attached suitably spaced ferrocene (FC) redox centers. The per-6-thio-beta-CD (S-beta-CD), SAM was investigated by cyclic voltammetry (CV) by using ferrocyanide and ferrocene carboxylic acid (FCA) as electrochemical probes. The mediator-tethered electrode was obtained by attaching a previously prepared (by a S(N)2 reaction) FC derivative to secondary OH groups of beta-CD, self-assembled on the Au surface. The obtained mediator-tethered electrode was characterised by CV, by using the above-mentioned electrochemical probes and (even if on a little extent) by microscopic ones. CV experiments in Fe(CN)(6)(-4) solutions provide evidence for the electron transfer (eT) mediating role played by FC centres tethered to beta-CD SAM, of importance in the perspective of realising oxygen-independent biosensors based on oxidase enzymes. (C) 2003 Elsevier B.V All rights reserved.
机译:我们报告了微晶的制备和表征。用自组装的单分子层(SAM)的β-环糊精(β-CD)衍生物进行化学修饰的电极,其具有适当间隔的二茂铁(FC)氧化还原中心。使用亚铁氰化物和二茂铁羧酸(FCA)作为电化学探针,通过循环伏安法(CV)研究了六硫代β-CD(S-β-CD)SAM。通过将预先制备的(通过S(N)2反应)FC衍生物附着到自组装在Au表面上的β-CD的仲OH基上获得介体连接的电极。所获得的介体束缚电极通过使用上述电化学探针的CV和(即使在很小程度上)通过微观探针进行CV表征。 Fe(CN)(6)(-4)解决方案中的CV实验提供了证据证明由FC中心束缚到β-CDSAM的电子传递(eT)介导的作用,这对于实现基于氧的非生物传感器至关重要氧化酶。 (C)2003 Elsevier B.V保留所有权利。

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