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首页> 外文期刊>Materials Science and Engineering >Exploring electrochemical reactivity toward ametryn of hybrid silicate films with phosphomolybdic acid
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Exploring electrochemical reactivity toward ametryn of hybrid silicate films with phosphomolybdic acid

机译：探索含磷钼酸对杂化硅酸盐膜的六乙炔的电化学反应性

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摘要

This paper describes the synthesis of organically-modified silicates (ormosils) with phosphomolybic acid (HPMo), and their use to detect ametryn. Gold electrodes coated with an ormosil film made of 3-cyanopropyltriethoxysilane (CPTS) and HPMo were used to detect ametryn between 3.5 and 24 µmol L−1in an acidic medium. There was no evidence of electroreduction of ametryn when ormosils with HPMo and (3-glycidyloxypropyl)trimethoxysilane (GLPTS) or 3-aminopropyltriethoxysilane (APTS) were used. This difference in behavior is ascribed to aggregation in CPTS ormosil, while GLPTS and APTS ormosils displayed homogeneous surfaces, according to scanning electron microscopy. HPMo had its structure preserved in CPTS ormosil as indicated by31P solid-state nuclear magnetic resonance spectra. Using polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS), we inferred that the functional group dipole moments in all ormosils are oriented parallel to the interface. Control of morphology thus seems essential for applications of ormosil films, being particularly promising to monitor environmentally-relevant herbicides.
机译：本文介绍了用磷钼酸（HPMo）合成有机改性的硅酸盐（甲硅烷基）及其在检测atricn中的用途。金电极涂有由3-氰基丙基三乙氧基硅烷（CPTS）和HPMo制成的ormosil膜，用于在酸性介质中检测3.5至24μµmol L-1之间的六氢萘啶。当使用HPMo和（3-环氧丙氧基丙基）三甲氧基硅烷（GLPTS）或3-氨基丙基三乙氧基硅烷（APTS）的甲齿龙时，没有证据表明牛肾上腺素电还原。根据扫描电子显微镜，这种行为差异归因于CPTS ormosil中的聚集，而GLPTS和APTS ormosil显示出均匀的表面。如31 P固态核磁共振光谱所示，HPMo的结构保留在CPTS ormosil中。使用偏振调制红外反射吸收光谱法（PM-IRRAS），我们推断所有ormosil中的官能团偶极矩都平行于界面取向。因此，形态控制似乎对于应用ormosil薄膜至关重要，特别有希望用于监测与环境有关的除草剂。

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