Metal phthalocyanines are well-known sensing phases with applications in different scientific fields due to their interesting properties. Detailed characterization by Raman spectroscopy was performed in order to study the shifting of the vibrational bands related to the coordination sphere of each metal phthalocyanine. In this work, a study involving the use of screen-printed electrodes (SPEs) with various metal phthalocyanines to electrochemically detect and quantify chlorine (Cl₂) gas is presented. The Cl₂ gas was generated in-situ via oxidation of the chloride present in form of aqueous salt solutions. The developed method offers not only the possibility to quantify chlorine, but also to discriminate among several chlorinated species due to the changes observed in the voltammetric profiles associated with the interaction between the specie assayed and the phthalocyanine metallic center. Optimization of detecting parameters was also performed to apply this procedure for the quantification of chlorine generated from commercial chlorine tablets. The development of this proof of concept shows interesting possibilities and easy-to-use applications with novel on metal phthalocyanines based SPE sensors.

中文翻译：

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金属酞菁修饰的丝网印刷电极：在氯化介质中的表征和电催化。

金属酞菁由于其令人感兴趣的性质而成为众所周知的感测相，并在不同的科学领域中得到应用。为了研究与每种金属酞菁配位球有关的振动带的移动，进行了拉曼光谱的详细表征。在这项工作中，提出了一项研究，其中涉及使用带有各种金属酞菁的丝网印刷电极（SPE）来电化学检测和定量氯（Cl ₂）气体。Cl ₂通过以盐水溶液形式存在的氯化物的氧化原位产生气体。所开发的方法不仅提供了对氯进行定量的可能性，而且还可以区分几种氯化物，这是由于与所测定的物种和酞菁金属中心之间的相互作用相关的伏安曲线图中观察到的变化。还进行了检测参数的优化，以应用该程序对从商业氯片中产生的氯进行定量。这一概念验证的发展显示了基于金属酞菁的新型SPE传感器的有趣可能性和易于使用的应用。