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Studies on ferrocene immobilized sol-gel glasses and its application in the construction of a novel solid-state ion sensor

机译：二茂铁固定化溶胶-凝胶玻璃的研究及其在新型固态离子传感器中的应用

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Two new sol-gel glass systems with immobilized ferrocene are developed using two different types of sol-gel precursors. System (1) is developed using ferrocene carboxaldehyde and a mixture of two silanes (3-aminopropyltriethoxy silane and 2-(3,4-epoxycyclohexyl)ethyltrimethoxy silane). System (2) is developed using ferrocene monocarboxylic acid and a mixture of 3-glycidoxypropyltrimethoxysilane and trimethoxysilane. The surfaces of the sol-gel glasses are analyzed based on scanning electron microscopy (SEM). The electrochemistry of ferrocene in system 1 and system 2 is characterized based on cyclic voltammetry. System 1 shows capacitive CV at slow scan rate whereas system 2 shows good reversible electrochemistry of ferrocene. The potentiometric response of the ferrocene immobilized sol-gel glass (system 1) is studied in 10 mM Tris-HCl buffer pH 7.0. A reproducible potential difference of system 1 to the order of -30 mV is recorded for 2 months with respect to a double junction SCE reference electrode. An ion sensing membrane is assembled over the ferrocene immobilized sol-gel glass using plasticized PVC matrix membrane containing dibenzo-18-crown-6. A typical potentiometric response of the ion sensor is reported. The response of the ion-sensor shows better response time, high reproducibility and relatively better slope for potassium analysis as compared to earlier reported solid-state K+ ion-sensor based on dibenzo-18-crown-6 neutral carrier. The reproducibility, detection limit and relative response of the ion sensor to Na+ and NH4+ ions are reported. [References: 27]
机译：使用两种不同类型的溶胶-凝胶前体，开发了两种新型的固定有二茂铁的溶胶-凝胶玻璃系统。使用二茂铁甲醛和两种硅烷（3-氨基丙基三乙氧基硅烷和2-（3,4-环氧环己基）乙基三甲氧基硅烷）的混合物开发系统（1）。使用二茂铁一元羧酸和3-环氧丙氧基丙基三甲氧基硅烷和三甲氧基硅烷的混合物开发系统（2）。基于扫描电子显微镜（SEM）分析溶胶-凝胶玻璃的表面。基于循环伏安法表征系统1和系统2中的二茂铁的电化学。系统1显示缓慢扫描速率下的电容CV，而系统2显示二茂铁良好的可逆电化学。在10 mM Tris-HCl缓冲液pH 7.0中研究了固定有二茂铁的溶胶-凝胶玻璃（系统1）的电位响应。相对于双结SCE参比电极，在2个月内记录了系统1的可再现电位差至-30 mV。使用包含二苯并-18-冠-6的增塑PVC基质膜，将离子感测膜组装在二茂铁固定的溶胶-凝胶玻璃上。报告了离子传感器的典型电位响应。与早期报道的基于二苯并18-冠-6中性载体的固态K +离子传感器相比，离子传感器的响应显示出更好的响应时间，较高的重现性和相对较好的钾分析斜率。报告了离子传感器对Na +和NH4 +离子的重现性，检测极限和相对响应。 [参考：27]

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