Abstract An iron-based complex Fe(II)-BTC (BTC = 1,3,5-benzenetricarboxylic acid) modified electrode as a mimetic enzyme sensor was designed for detecting the photorelease of nitric oxide (NO) in sodium nitroprusside (SNP). The Fe(II)-BTC complex film was electrodeposited on the surface of a glassy carbon electrode, and its morphology and composition were characterized by scanning electron microscopy, energy-dispersive spectrometer and Fourier transform infrared. The response of the mimetic enzyme sensor was investigated by diverse electrochemical methods, including voltammetry, electrochemical impedance spectroscopy, chronocoulometry and chronoamperometry. The sensor exhibited good catalytic activity for electrochemical oxidation of NO and followed Michaelis–Menten behaviors. The electrocatalytic oxidation mechanism for NO was proposed. The mimetic enzyme sensor not only had the features of easy preparation, low cost and high stability, but also had a wide linear range from 18 nmol L−1 to 9 μmol L−1 and a low detection limit of 7.2 nmol L−1, which had been used to detect the NO photorelease from SNP successfully.

中文翻译：

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用于硝普钠光释放的铁基模拟酶传感器

摘要 设计了一种铁基络合物 Fe(II)-BTC (BTC = 1,3,5-苯三甲酸) 修饰电极作为模拟酶传感器，用于检测硝普钠 (SNP) 中一氧化氮 (NO) 的光释放。在玻碳电极表面电沉积Fe(II)-BTC复合膜，通过扫描电子显微镜、能谱仪和傅里叶变换红外光谱对其形貌和成分进行表征。通过多种电化学方法研究模拟酶传感器的响应，包括伏安法、电化学阻抗谱、计时库仑法和计时电流法。该传感器对 NO 的电化学氧化表现出良好的催化活性，并遵循 Michaelis-Menten 行为。提出了NO的电催化氧化机理。