Engineering Research Center of Transportation Materials, Ministry of Education, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Aug;79(3):437-42. doi: 10.1016/j.saa.2011.02.054. Epub 2011 Mar 30.
We previously reported the construction of a family of fluorescent film sensors for organic copper salts by covalently coupling polycyclic aromatic hydrocarbons on epoxy-terminated self-assembled monolayers on glass plate surfaces. Here we investigate the sensing properties and mechanism of covalently coupling pyrene on a glass plate surface via a long flexible "Y" type spacer. X-ray photoelectron spectroscopy (XPS) and fluorescence spectra measurements demonstrate the covalent attachment of pyrene in our adlayer. Compared with those results obtained in the previous studies, this new film sensor did not show highly selectivity for organic copper salts, which can be attributed to the introduction of sulfonyl groups connecting the pyrene moieties and the spacers. The presence of sulfonyl units made the microenvironments of pyrene relatively hydrophilic and thus showed less screening effect for inorganic ions. The specificity and reversibility of the film sensor toward Cu (II) made it attractive for sensing applications.
我们之前报道了通过将多环芳烃共价偶联到玻璃表面的环氧封端自组装单层上来构建用于有机铜盐的荧光膜传感器的家族。在这里，我们通过长的柔性“Y”型间隔物研究了共价偶联在玻璃表面上的芘的传感特性和机制。X 射线光电子能谱（XPS）和荧光光谱测量证明了我们的吸附层中芘的共价附着。与之前研究中获得的结果相比，这种新型膜传感器对有机铜盐没有表现出高选择性，这可以归因于连接芘部分和间隔物的磺酰基的引入。磺酰基单元的存在使芘的微环境相对亲水，因此对无机离子的屏蔽作用较小。该膜传感器对 Cu（II）的特异性和可逆性使其在传感应用中具有吸引力。
