【作者】 景爱华；

【导师】 冶保献； 张书胜；

【作者基本信息】 郑州大学 ， 分析化学， 2004， 硕士

【摘要】 众所周知，杯芳烃是一类由苯酚和甲醛在酚羟基邻位缩合而成的一类大环化合物。由于其特殊的空腔结构的包合作用可以对不同的离子进行选择识别，所以可以用来做化学修饰电极的修饰剂。本论文用电化学的方法研究了对叔丁基杯[8]芳烃膜修饰电极和磺酸基杯[6]芳烃的电化学性质，并利用对叔丁基-杯[8]芳烃膜修饰玻碳电极差示脉冲伏安法同时测定了三种单胺类神经递质：多巴胺（dopamine）、5-羟色胺（5-hydroxytryptamine，5-HT）和肾上腺素（adrenalin）。本论文主要内容包括以下几个方面： 1：研究了对叔丁基杯[8]芳烃膜修饰电极的电化学性质。此电极在NH₃-NH₄Cl缓冲溶液中的电化学氧化是一个双电子转移的准可逆过程。另外，利用多种电化学手段研究了该电极反应，求得了动力学参数。 2：研究了用对叔丁基杯[8]芳烃膜化学修饰玻碳电极，差示脉冲伏安法同时测定了三种单胺类神经递质多巴胺（dopamine）、5-羟色胺（5-hydroxytryptamine，5-HT）和肾上腺素（adrenalin）。结果表明，在适当的实验条件下，多巴胺，肾上腺素和5-羟色胺在该种膜修饰电极上的氧化峰得到较好的分离，据此，建立了同时测定这三种神经递质的新方法，该法简便、快速、样品用量少、结果准确、重现性好。 3：研究了磺酸基杯[6]芳烃在玻碳电极上的电化学性质。在KH₂PO₄-Na₂HPO₄缓冲溶液中，磺酸基杯[6]有一准可逆的单电子还原峰，峰电流与磺酸基杯[6]芳烃浓度在6.0×10^-6mol／L～1.0×10^-3mol／L范围内呈良好线性关系，可以用于浓度检测。另外，利用多种电化学手段研究了该电极反应，求得了动力学参数。更多还原

【Abstract】 It is well known that calixarenes are a group of cavity-shaped cyclic molecules comprising phenol units linked via alkylidene group. They possess special cavity structure and thus are able to form host-guest inclusion complexes with a variety of molecules selectively. If calixarenes were modified on electrode surface to form chemically membrane-modified electrodes, some molecules with electrochemical characters resemble or peak potential similitude may be separated each other. In this paper, the voltammetry behaviors of the electrochemical characters of p-tert-butyl- calix [8] arene film modified glassy carbon electrode (GCE) and suffocate calix [6] arene in the solutions have been studied respectively. Furthermore, a very good peak potential separation of three kinds neurotransmitters at p-tert-butyl-calix [8] arene film modified electrode had been also gained. The main results are expressed as fellows:1: The voltammetry behavior of p-tert-butyl- calix [8] arene film modified glassy carbon electrode (GCE) has been studied. In the ammonia solution + ammoniate chloride buffer solution (pHS.O), an obvious reduction peak controlled by diffusing is observed and the electrode reaction process has been studied particularly. Moreover, the kinetic parameters have been obtained too.2: A method for separation of dopamine, 5-hydroxytryptamine and adrenalin; by p-tert-butyl-cah’x[8] arene chemically modified glassy carbon electrode with differential pulse voltammetry is described. The result shows a good peak potential separation for these three kinds of neurotransmitters. The peak currents are in linear relationship to the concentrations of dopamine, adrenalin and 5-hydroxytryptamine in the ranges of 2.0 X 10-6mol/L ~ 1.1 X 10-3mol/L, 2.0 10-6mol/L ~ 2.8 X 10-4mol/L and 9.0 X 10-6mol/L ~ 1.4 X 10-3mol/L respectively. This is the first time to determine three neurotransmitters at same time by electrochemical method and the kinetic parameters have been obtained too.3: In this paper, the voltammetry behavior of sulfa-calix [6] arene has been performed for the first time by using many electrochemistry methods at glassy carbon electrode. In the potassium dehydrogenate phosphate + sodium hydrogen phosphate buffer solution (pH5.2), sulfa-calix [6] arene has an obvious reduction peak controlled by diffusing. The reduction peak currents are a fine linear relationship with sulfa-calix [6] arene concentrations in the range of 6.0x10-6 ~1.0 10-3mol/L with detection limit of 5.0x10-6mol/L. Based on the method, the quantitative analysis sulfa-calix [6] arene is primarily established by electrochemistry. In addition, the electrode reaction process has been studied particularly and the kinetic parameters have been obtained also.更多还原