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首页> 外文期刊>Journal of Solid State Electrochemistry >Influence of inner transducer properties on EMF response and stability of solid-contact anion-selective membrane electrodes based on metalloporphyrin ionophores
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Influence of inner transducer properties on EMF response and stability of solid-contact anion-selective membrane electrodes based on metalloporphyrin ionophores

机译：内部换能器特性对基于金属卟啉离子载体的固体接触阴离子选择膜电极的EMF响应和稳定性的影响

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摘要

The performance of solid-contact coated-wire-type electrodes with plasticized poly(vinyl chloride) membranes containing metalloporphyrins as anion-selective ionophores is reported. The membranes are deposited on transducers based on graphite pastes and graphite rods. The hydrophobicity of the underlying conductive transducer surface is found to be a key factor that influences the formation of an aqueous layer beneath the polymer film. Elimination of this ill-defined water layer greatly improves the electrochemical properties of the ion-sensors, such as electromotive force stability and lifetime. Only highly lipophilic electrode substrates, namely graphite paste with mineral oil, were shown to prevent the formation of aqueous layer underneath the ion-sensing membrane. The possibility of employing Co(III)-tetraphenylporphyrin both as NO2 ? selective ionophore and as electron- and ion-conducting species to ensure ion-to-electron translation was also discussed based on the results of preliminary experiments.
机译：报道了具有包含金属卟啉作为阴离子选择离子载体的增塑聚氯乙烯膜的固体接触式涂层线型电极的性能。膜被沉积在基于石墨浆和石墨棒的换能器上。发现下面的导电换能器表面的疏水性是影响聚合物膜下方水层形成的关键因素。消除这种不确定的水层可以极大地改善离子传感器的电化学性能，例如电动势稳定性和寿命。仅显示出高度亲脂性的电极基材，即带有矿物油的石墨浆料，可防止在离子传感膜下方形成水层。在初步研究结果的基础上，还讨论了同时使用Co（III）-四苯基卟啉作为NO2 α选择性离子载体以及电子和离子导电物质来确保离子向电子翻译的可能性。实验。

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