MIPdatabase
Authors: Zhang J, Tan WS, Tao YX, Deng LH, Qin Y, Kong Y
Article Title: A novel electrochemical chiral interface based on sandwich-structured molecularly imprinted SiO2/AuNPs/SiO2 for enantioselective recognition of cysteine isomers.
Publication date: 2018
Journal: Electrochemistry Communications
Volume: 86
Page numbers: 57-62.
DOI: 10.1016/j.elecom.2017.11.016
Alternative URL: https://www.sciencedirect.com/science/article/pii/S1388248117303247
Abstract: SiO2 nanospheres were synthesized by the sol-gel method using tetraethoxysilane (TEOS) as the precursor, which was then modified with 3-aminopropyltriethoxysilane (APTES) for the grafting of NH2 to the SiO2 surface. Au nanoparticles (AuNPs) were anchored to the NH2 grafted SiO2, and then l-cysteine (L-Cys) templates were introduced to the SiO2/AuNPs through forming AuS bond. Another layer of SiO2 was then coated on the L-Cys doped SiO2/AuNPs as the coating layer, and then the templates were removed by calcination to form a sandwich-structured molecularly imprinted SiO2/AuNPs/SiO2. Finally, the molecularly imprinted chiral interface was applied for electrochemical enantioselective recognition of Cys isomers, and discernible differences in the current signals could be observed on the differential pulse voltammograms (ID-cys/IL-cys, 2.36)
Template and target information: l-cysteine, L-Cys, cysteine
Author keywords: Electrochemical chiral interface, sandwich structure, Molecularly imprinted SiO2, AuNPs, SiO2, enantioselective recognition, Cys isomers
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