A.M. Butlerov Institute of Chemistry of Kazan Federal University, 420008, Kremlevskaya, 18, Kazan, 420008, Russian Federation.
Institute of Physics of Kazan Federal University, 420008, Kremlevskaya, 18, Kazan, 420008, Russian Federation.
Sci Rep. 2019 Jan 23;9(1):417. doi: 10.1038/s41598-018-36937-5.
Synthesis and application of nanostructured materials applicable in the assembly of electrochemical sensors is one of the important trends in material sciences and analytical chemistry. In this work, we have proposed and implemented simple non-template method for assembling nanofibers from the polyaniline ultrasonicated with phenyliminophenothiazine in aqueous media. Two-step procedure including association with emeraldine dispersion and reorganization under ultrasonication led to formation of nanofibrillar structures with average diameter of 20 nm. UV-spectroscopy confirms that association of phenyliminophenothiazine and polyaniline in acidic medium resulted in an intense absorption band at 900-910 nm due to donor-acceptor interaction between the reactants. The material combined emeraldine charge transmission with redox activity of phenyliminophenothiazine was found promising for electrochemical sensing. It was confirmed by comparison of characteristics of appropriate solid-contact sensors based on emeraldine and phenyliminophenothiazine toward Fe(III) ions, ascorbic acid and hydroquinone. In all the cases, the use of phenyliminophenothiazine results in a wider concentration range and more reproducible signal against characteristics of similar sensor based on polyaniline. The applicability of the sensor was confirmed by determination of iron content in commercial medication.
用于电化学传感器组装的纳米结构材料的合成与应用是材料科学和分析化学的重要趋势之一。在这项工作中，我们提出并实施了一种简单的非模板方法，用于在水介质中超声聚苯亚胺与苯并咪唑吩噻嗪，以组装纳米纤维。两步程序包括与埃默林分散体的缔合和超声下的重组，导致形成平均直径为 20nm 的纳米纤维状结构。紫外光谱证实，在酸性介质中，苯并咪唑吩噻嗪与聚苯亚胺的缔合导致在 900-910nm 处出现强吸收带，这是由于反应物之间的供体-受体相互作用。该材料将埃默林的电荷传递与苯并咪唑吩噻嗪的氧化还原活性结合在一起，被证明对电化学传感有很大的应用潜力。通过比较基于埃默林和苯并咪唑吩噻嗪的合适固体接触传感器对 Fe(III)离子、抗坏血酸和对苯二酚的特性，可以证实这一点。在所有情况下，与基于聚苯亚胺的类似传感器的特性相比，使用苯并咪唑吩噻嗪都导致更宽的浓度范围和更可重复的信号。通过测定商业药物中的铁含量，验证了传感器的适用性。
