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首页> 外文期刊>ACS applied materials & interfaces >Construction of Electrochemical Chiral Interfaces with Integrated Polysaccharides via Amidation
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Construction of Electrochemical Chiral Interfaces with Integrated Polysaccharides via Amidation

机译：通过酰胺化构建具有集成多糖的电化学手性界面

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摘要

Polysaccharides of sodium carboxymethyl cellulose (CMC) and chitosan (CS) were integrated together via amidation reactions between the carboxyl groups on sodium CMC and the amino groups on CS. Compared with individual sodium CMC and CS, the integrated polysaccharides with a mass ratio of 1:1, CMC-CS (1:1), exhibited a three-dimensional (3D) porous network structure, resulting in a significantly enhanced hydrophility due to the exposed polar functional groups in the CMC-CS (1:1). Chiral interfaces were constructed with the integrated polysaccharides and used for electrochemical enantiorecognition of tryptophan (Trp) isomers. The CMC-CS (1:1) chiral interfaces exhibited excellent selectivity toward the Trp isomers owing to the highly hydrophilic feature of CMC-CS (1:1) and the different steric hindrance during the formation of H bonds between Trp isomers and CMC-CS (1:1). Also, the optimization in the preparation of integrated polysaccharides such as mass ratio and combination mode (amidation or electrostatic interactions) was investigated. The CMC-CS (1:1) presented the ability of determining the percentage of D-Trp in racemic mixtures, and thus, the proposed electrochemical chiral interfaces could be regarded as a potential biosensing platform for enantiorecognition of chiral compounds.
机译：羧甲基纤维素钠（CMC）和壳聚糖（CS）的多糖通过CMC钠上的羧基与CS上的氨基之间的酰胺化反应整合在一起。与单个CMC和CS钠钠相比，质量比为1：1的集成多糖CMC-CS（1：1）表现出三维（3D）多孔网络结构，从而显着增强了亲水性。 CMC-CS（1：1）中暴露的极性官能团。用整合的多糖构建手性界面，并将其用于色氨酸（Trp）异构体的电化学对映体识别。由于CMC-CS（1：1）的高度亲水特性以及Trp异构体与CMC- CS（1：1）。此外，还研究了制备集成多糖（例如质量比和组合模式（酰胺化或静电相互作用））的优化方法。 CMC-CS（1：1）具有确定外消旋混合物中D-Trp百分比的能力，因此，拟议的电化学手性界面可被视为手性化合物对映体识别的潜在生物传感平台。

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