Voltammetric Behavior of a Chemically Modified Silsesquioxane with 4-Amino-5-Phenyl-4h-[1,2,4]-Triazole-3-Thiol and its Application for Detection of L-Dopamine

Daniela Rodrigues Silvestrini; Tayla Fernanda Serantoni da Silveira; Urquisa de Oliveira Bicalho; Devaney Ribeiro Do Carmo

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Voltammetric Behavior of a Chemically Modified Silsesquioxane with 4-Amino-5-Phenyl-4h-[1,2,4]-Triazole-3-Thiol and its Application for Detection of L-Dopamine

机译：化学修饰的倍半硅氧烷与4-氨基-5-苯基-4h- [1,2,4]-三唑-3-硫醇的伏安行为及其在L-多巴胺检测中的应用

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A hybrid nanocomposite formed by interaction of a octakis(3-chloropropyl)octasilsesquioxane (SS)modified with 4-Amino-5-Phenyl-4H-1,2,4-Triazole-3-Thiol (APhTT), and its subsequent reactionwith copper and hexacyanoferrate (III) (CuHSA) was incorporated into a graphite paste electrode andthe electrochemical studies were conducted with cyclic voltammetry. The cyclic voltammogram of thegraphite paste electrode modified with CuHSA, showed one redox couple with average potential Eθ’=0.71V (vs Ag/AgCl(sat.)), attributed to the CuIIFeII(CN)6/CuIIFeIII(CN)6 process (20% w/w; v=20 mV s-1; KCl; 1.00 mol L-1). The graphite paste electrode modified with CuHSA allowed the electrocatalyticdetermination of L-Dopamine using electrochemical techniques such as, cyclic voltammetry anddifferential pulse voltammetry. Through differential pulse voltammetry was possible to evidence twolinear regions in the studied concentration range and the detection limit obtained by this technique waslower than that obtained by the technique of cyclic voltammetry.

机译：杂化纳米复合材料，由4-氨基-5-苯基-4H-1,2,4-三唑-3-硫醇（APhTT）改性的八（3-氯丙基）八聚倍半硅氧烷（SS）相互作用并随后与铜反应而形成将六氰基高铁酸盐（III）（CuHSA）掺入石墨糊电极中，并用循环伏安法进行电化学研究。用CuHSA修饰的石墨糊电极的循环伏安图显示，归因于CuIIFeII（CN）6 / CuIIFeIII（CN）6过程的氧化还原对具有平均电势Eθ'= 0.71V（vs Ag / AgCl（sat。））。 20％w / w; v = 20 mV s-1; KCl; 1.00 mol L-1）。用CuHSA修饰的石墨糊电极可以使用电化学技术，例如循环伏安法和微分脉冲伏安法对L-多巴胺进行电催化测定。通过差分脉冲伏安法可以证明所研究浓度范围内的两个线性区域，并且该技术获得的检测限低于循环伏安技术获得的检测限。

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《International Journal of Electrochemical Science》 |2015年第4期|共20页
作者
Daniela Rodrigues Silvestrini; Tayla Fernanda Serantoni da Silveira; Urquisa de Oliveira Bicalho; Devaney Ribeiro Do Carmo;
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2. A New Hybrid Polyhedral Cubic Silsesquioxane Chemically Modified with 4-amino-5-(4-pyridyl)-4H-1,2,4-triazole-3-thiol (APTT) and Copper Hexacyanoferrate(III) for Voltammetric Determination of Nitrite [J] . Layciane Aparecida Soares, Tayla Fernanda Serantoni da Silveira, Daniela Rodrigues Silvestrini, International Journal of Electrochemical Science . 2013,第4期

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机译：用4-氨基-5-苯基-4H-1,2,4 - 三唑-3-硫醇的倍半硅氧烷有机官能团的反应性：互补表征及其施用L-多巴胺的计时检测

Voltammetric Behavior of a Chemically Modified Silsesquioxane with 4-Amino-5-Phenyl-4h-[1,2,4]-Triazole-3-Thiol and its Application for Detection of L-Dopamine

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