Molecular Recognition of Phenylalanine Enantiomers onto a Solid Surface Modified with Electropolymerized Pyrrole‐β‐Cyclodextrin Conjugate,Electroanalysis

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Molecular Recognition of Phenylalanine Enantiomers onto a Solid Surface Modified with Electropolymerized Pyrrole‐β‐Cyclodextrin Conjugate
Electroanalysis ( IF 2.7 ) Pub Date : 2019-12-03 , DOI: 10.1002/elan.201900615
Tatiana V. Shishkanova ₁ , Nina Habanová ₁ , Michal Řezanka ₂ , Gabriela Broncová ₁ , Přemysl Fitl ₃ , Martin Vrňata ₃ , Pavel Matějka ₄

Affiliation

We report the electrochemical deposition of a β-cyclodextrin pyrrole conjugate (Py-β-CD) on an electrode surface including i) characterization based on surface-enhanced Raman scattering and field-emission scanning electron microscopy; ii) studies of the molecular recognition of enantiomers of phenylalanine methyl ester hydrochlorides (Phe) based on linear sweep voltammetry and a quartz crystal microbalance. The PPy-β-CD polymeric layer on a metallic substrate is distinguished by its inhomogeneity, in which both highly ordered β-CD units and highly disordered polymer chains are observed. The voltammetric recognition results showed that PPy-β-CD exhibited a higher sensitivity for D-Phe (138�15)×10 than for L-Phe (6�1)×10 within the concentration range 0.1–0.75 mM (n=3) despite the differences in the polymer arrangement on the surface. A possible mechanism of molecular recognition of phenylalanine enantiomers is

中文翻译：

苯丙氨酸对映体在电聚合吡咯-β-环糊精偶联物修饰的固体表面上的分子识别

我们报告了 β-环糊精吡咯共轭物 (Py-β-CD) 在电极表面的电化学沉积，包括 i) 基于表面增强拉曼散射和场发射扫描电子显微镜的表征；ii) 基于线性扫描伏安法和石英晶体微天平对苯丙氨酸甲酯盐酸盐 (Phe) 对映异构体的分子识别研究。金属基材上的 PPy-β-CD 聚合物层以其不均匀性而著称，其中观察到高度有序的 β-CD 单元和高度无序的聚合物链。伏安法识别结果表明，在 0.1-0.75 mM 的浓度范围内，PPy-β-CD 对 D-Phe (138×15)×10 表现出比对 L-Phe (6×1)×10 更高的灵敏度 (n=3 ) 尽管表面上的聚合物排列存在差异。

更新日期：2019-12-03

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