Department of Analytical and Organic Chemistry, University Rovira i, Virgili, Campus Sescelades, Marcel·lí Domingo s/n, 43007 Tarragona, Spain.
Analyst. 2013 May 7;138(9):2698-703. doi: 10.1039/c3an00313b.
Non-covalent functionalization of multi-walled carbon nanotubes (MWCNTs) by a pyrene based benzo-18-crown-6 ether 1 leads to nanostructure assemblies that play both the role of an ion-to-electron transducer and a selective recognition element in solid-contact ion-selective-electrodes (SC-ISEs). The high loading capacity (36 wt%) as well as the suitable dispersion character of the MWCNT hybrid in the ion-selective membrane (ISM) confirmed the benefit of this approach over the covalent one. The sensor has been applied successfully to the detection of potassium. Nernstian response (56.9 ± 0.9 mV per decade) was obtained (10(-5) and 10(-2) M K(+)) and the selectivity pattern was not altered by the immobilization of the ionophore on the MWCNTs. Leakage of the ionophore from the polymeric matrix is therefore avoided while the sensor construction was simplified and the analytical performances were maintained.
基于芘的苯并-18-冠-6 醚 1 通过非共价功能化多壁碳纳米管 (MWCNTs)，得到了纳米结构组装体，在固态接触离子选择性电极 (SC-ISE) 中既充当离子-电子转换器，又充当选择性识别元件。MWCNT 杂化在离子选择性膜 (ISM) 中的高负载能力 (36wt%) 和适当的分散特性证实了这种方法优于共价方法的优势。该传感器已成功应用于钾的检测。（10(-5) 和 10(-2) M K(+)) 获得了 Nernst 响应 (56.9 ± 0.9 mV 每 decade)，并且固定化在 MWCNTs 上的离子载体对选择性模式没有影响。因此，避免了离子载体从聚合物基质中的泄漏，同时简化了传感器结构并保持了分析性能。
