Abstract

Bimetallic porphyrin coordination polymers with various Cu/Cd ratios (Cu–Cd) were synthesized and characterized by X-ray diffraction, infrared spectroscopy, inductively coupled plasma atomic emission spectrometry and transmission electron microscopy. The presence of Cu(II) in the series of bimetallic porphyrin coordination polymers makes them electrochemically active, consequently, they can be used in electrochemical sensing of hydrogen peroxide and sodium nitrite. Their sensing performance was investigated by cyclic voltammetry and chronoamperometry. The performance was affected by Cu/Cd ratio of Cu–Cd, and the optimal Cu–Cd-2 (with Cu/Cd ratio of 1.59) showed the best performance: the detection sensitivities for H₂O₂ and NaNO₂ were 414 and 418 mA/(M cm²), respectively, and detection limits were 2.7 and 3 μM (S/N = 3). These results demonstrate that Cu−Cd offers great prospect for the construction of non-enzymatic sensors for hydrogen peroxide or sodium nitrite.

中文翻译：

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基于不同铜镉比的铜镉双金属卟啉配位聚合物的电化学传感器

摘要

合成了具有不同 Cu/Cd 比 ( Cu – Cd ) 的双金属卟啉配位聚合物，并通过 X 射线衍射、红外光谱、电感耦合等离子体原子发射光谱和透射电子显微镜对其进行了表征。Cu(II) 在双金属卟啉配位聚合物系列中的存在使它们具有电化学活性，因此，它们可用于过氧化氢和亚硝酸钠的电化学传感。通过循环伏安法和计时电流法研究了它们的传感性能。性能受 Cu-Cd 的 Cu/Cd 比的影响，最佳 Cu-Cd-2（Cu/Cd 比为 1.59）表现出最佳性能：对 H ₂ O ₂和 NaNO的检测灵敏度_{2 个}分别为 414 和 418 mA/(M cm ² )，检测限分别为 2.7 和 3 μM (S/N = 3)。这些结果表明，Cu-Cd 为构建过氧化氢或亚硝酸钠的非酶传感器提供了广阔的前景。