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Modification of N,S co-doped graphene quantum dots with p-aminothiophenol-functionalized gold nanoparticles for molecular imprint-based voltammetric determination of the antiviral drug sofosbuvir
Microchimica Acta ( IF 5.3 ) Pub Date : 2019-08-13 , DOI: 10.1007/s00604-019-3647-7
Ashraf M. Mahmoud , Mohamed M. El-Wekil , Mater H. Mahnashi , Marwa F. B. Ali , Saad A. Alkahtani

A molecularly imprinted polymer (MIP) was developed for the electrochemical determination of the antiviral drug sofosbuvir (SOF). The MIP was obtained by polymerization of p-aminothiophenol (p-ATP) on N,S co-doped graphene quantum dots (N,S@GQDs) in the presence of gold nanoparticles to form gold-sulfur covalent network. The presence of quantum dots improves the electron transfer rate, enhances surface activity and amplifies the signal. The nanocomposites were characterized by FTIR, TEM, EDX, and SEM. The electrochemical performance of the electrode was investigated by differential pulse voltammetry and cyclic voltammetry. The sensor uses hexacyanoferrate as the redox probe and is best operated at a potential of around 0.36 V vs. Ag/AgCl. It has a linear response over the concentration range of 1–400 nM SOF, with a detection limit of 0.36 nM. Other features include high selectivity, good reproducibility and temporal stability. The sensor was applied to the determination of SOF in spiked human plasma. Graphical abstract Novel sofosbuvir imprinted p-ATP polymer was synthesized by the aid of gold nanoparticles on N,S co-doped graphene quantum dots as a good conductive support. The imprinted polymer was used for detection of sofosbuvir in real samples by using the ferri/ferrocyanide redox probe. Novel sofosbuvir imprinted p-ATP polymer was synthesized by the aid of gold nanoparticles on N,S co-doped graphene quantum dots as a good conductive support. The imprinted polymer was used for detection of sofosbuvir in real samples by using the ferri/ferrocyanide redox probe.

中文翻译:

用对氨基苯硫酚功能化金纳米粒子修饰 N,S 共掺杂石墨烯量子点,用于基于分子印迹的伏安法测定抗病毒药物索非布韦

开发了一种分子印迹聚合物 (MIP),用于电化学测定抗病毒药物索非布韦 (SOF)。MIP 是通过在金纳米粒子的存在下在 N,S 共掺杂石墨烯量子点 (N,S@GQDs) 上聚合对氨基苯硫酚 (p-ATP) 形成金硫共价网络而获得的。量子点的存在提高了电子转移率,增强了表面活性并放大了信号。通过FTIR、TEM、EDX和SEM对纳米复合材料进行表征。通过微分脉冲伏安法和循环伏安法研究了电极的电化学性能。该传感器使用六氰基铁酸盐作为氧化还原探针,最佳工作电压为 0.36 V(相对于 Ag/AgCl)。它在 1–400 nM SOF 的浓度范围内具有线性响应,检测限为 0.36 nM。其他特点包括高选择性、良好的重现性和时间稳定性。该传感器用于测定加标人血浆中的 SOF。图形摘要 借助作为良好导电载体的 N,S 共掺杂石墨烯量子点上的金纳米粒子,合成了新型 sofosbuvir 印迹 p-ATP 聚合物。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。新型索非布韦印迹 p-ATP 聚合物是通过在 N,S 共掺杂石墨烯量子点上作为良好导电载体的金纳米粒子合成的。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。该传感器用于测定加标人血浆中的 SOF。图形摘要 借助作为良好导电载体的 N,S 共掺杂石墨烯量子点上的金纳米粒子,合成了新型 sofosbuvir 印迹 p-ATP 聚合物。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。新型索非布韦印迹 p-ATP 聚合物是通过在 N,S 共掺杂石墨烯量子点上作为良好导电载体的金纳米粒子合成的。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。该传感器用于测定加标人血浆中的 SOF。图形摘要 借助作为良好导电载体的 N,S 共掺杂石墨烯量子点上的金纳米粒子,合成了新型 sofosbuvir 印迹 p-ATP 聚合物。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。新型索非布韦印迹 p-ATP 聚合物是通过在 N,S 共掺杂石墨烯量子点上作为良好导电载体的金纳米粒子合成的。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。新型索非布韦印迹 p-ATP 聚合物是通过在 N,S 共掺杂石墨烯量子点上作为良好导电载体的金纳米粒子合成的。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。新型索非布韦印迹 p-ATP 聚合物是通过在 N,S 共掺杂石墨烯量子点上作为良好导电载体的金纳米粒子合成的。通过使用铁/亚铁氰化物氧化还原探针,印迹聚合物用于检测实际样品中的索非布韦。
更新日期:2019-08-13
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