Research Center of Gansu Military and Civilian Integration Advanced Structural Materials, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
Research Center of Gansu Military and Civilian Integration Advanced Structural Materials, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
Bioelectrochemistry. 2019 Oct;129:189-198. doi: 10.1016/j.bioelechem.2019.05.016. Epub 2019 Jun 4.
A facile approach was reported to synthesize β-cyclodextrin functionalized graphene that is bridged by 3,4,9,10-perylene tetracarboxylic acid (rGO-PTCA-CD) via a chemical route that involves the functionalization of rGO with PTCA followed by covalently cross-linking NH-β-CD. The as-prepared rGO-PTCA-CD was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and electrochemical methods. The working electrodes were thoroughly studied for the cyclic voltammetry by using [Fe(CN)] as redox probe and using ferrocene as an internal standard. Furthermore, rGO-PTCA-CD was successfully applied to the recognition of phenylalanine enantiomers. The host-guest inclusion interaction between rGO-PTCA-CD and the phenylalanine enantiomers was investigated by differential pulse voltammetry with Fc used as a competitor. The recognition result showed that the rGO-PTCA-CD-modified glassy carbon electrode exhibited higher chiral recognition capability for L-Phe than for D-Phe with an enantioselectivity coefficient of 2.07. The proposed modified electrode had a limit of detection of 0.08 nM and 0.2 nM (S/N = 3) for L-Phe and D-Phe, respectively, with a linear response range of 0.01 mM to 5 mM, which was ascribed to the synergy of the rGO-PTCA (e.g., its excellent electrochemical performance) and β-CD (e.g., the hydrophobic inner cavity with good molecular recognition and enrichment abilities).
报道了一种简便的方法来合成β-环糊精功能化的石墨烯，该石墨烯通过化学途径桥接 3,4,9,10-苝四羧酸（rGO-PTCA-CD），该途径涉及 rGO 与 PTCA 的功能化，然后通过共价交联 NH-β-CD。通过傅里叶变换红外光谱、扫描电子显微镜、X 射线光电子能谱和电化学方法对所制备的 rGO-PTCA-CD 进行了表征。通过使用 [Fe(CN)]作为氧化还原探针，使用二茂铁作为内标，对工作电极进行了详细的循环伏安法研究。此外，rGO-PTCA-CD 成功应用于苯丙氨酸对映体的识别。通过差分脉冲伏安法研究了 rGO-PTCA-CD 与苯丙氨酸对映体之间的主客体包合相互作用，并用 Fc 作为竞争物。识别结果表明，与 D-Phe 相比，rGO-PTCA-CD 修饰的玻碳电极对 L-Phe 具有更高的手性识别能力，手性识别系数为 2.07。该修饰电极对 L-Phe 和 D-Phe 的检测限分别为 0.08 nM 和 0.2 nM（S/N=3），线性响应范围为 0.01 mM 至 5 mM，这归因于 rGO-PTCA（例如，其出色的电化学性能）和β-CD（例如，具有良好的分子识别和富集能力的疏水性内腔）的协同作用。
Zotero 插件