Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, PR China.
Analyst. 2012 Feb 21;137(4):944-52. doi: 10.1039/c1an15945c. Epub 2011 Dec 20.
A novel idea on the basis of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin (THPP) functionalized carbon nanotubes (CNTs) film was developed to simulate the chromatographic separation, which was able to rapidly and simultaneously detect dihydroxybenzene isomers based on their different oxidation potentials and corresponding currents. The mechanism involved in the recognition and isolation of the dihydroxybenzene isomers was explored and confirmed by UV spectra and density functional theory. It was proven that the current method for simultaneously detecting and isolating dihydroxybenzene isomers was ascribed to the priority of porphyrin film to induce oxidation of the three kinds of isomers, and the priority depends to a large extent on the different tendencies of dihydroxybenzene to interact with the peripheral hydroxyl group and with the extended π-conjugated ring of porphyrin. Most important of all, porphyrin functionalized CNTs film allows for the formation of well-defined interface and provides an advantageous and high-performance platform for the simultaneous determination and isolation of dihydroxybenzene isomers.
基于 5,10,15,20-四(4-羟苯基)卟啉(THPP)功能化碳纳米管(CNTs)薄膜的新颖想法被开发出来，以模拟色谱分离，能够基于不同的氧化电位和相应的电流快速且同时检测二羟基苯异构体。通过紫外光谱和密度泛函理论探讨并证实了二羟基苯异构体的识别和分离的机制。证明了同时检测和分离二羟基苯异构体的电流方法归因于卟啉薄膜优先诱导三种异构体的氧化，而这种优先性在很大程度上取决于二羟基苯与外围羟基和卟啉扩展的π-共轭环相互作用的不同趋势。最重要的是，卟啉功能化 CNTs 薄膜允许形成明确的界面，并为二羟基苯异构体的同时测定和分离提供了有利的高性能平台。
