Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China.
College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, China.
Inorg Chem. 2022 May 9;61(18):6910-6918. doi: 10.1021/acs.inorgchem.2c00244. Epub 2022 Apr 27.
Four polyoxometalate (POM)-based organic-inorganic hybrid compounds, namely, (Hbimb)H[((Mn(HO)(μ-bimb))(Mn(HO))(Mn(HO))(AgPWO))]·29HO (), [(Cu(Hbimb)(HO)(μ-bimb)Cu(Hbimb)(HO))(Cu(HO)(μ-bimb)Cu(HO))((Cu(HO))(μ-bimb)(Cu(HO)))H(AgPWO)]·12.5HO (), (Hbimb)H[(Zn(Hbimb)(HO)(Zn(Hbimb)(HO)))(AgPWO)]·12HO (), and (Hbimb)H[(Ag(HO))(Ag(Hbimb)Ag(Hbimb)(μ-bimb)Ag)(Ag(HO))(AgPWO)]·7HO () (bimb = 1,4-bis(1H-imidazol-1-yl)benzene), were hydrothermally synthesized using a silver-centered Preyssler-type POM K[AgPWO]·18HO (abbreviated as K-{AgPW}) as a precursor. In -, {AgPW} clusters integrating the merits of Ag and {PW} units are modified by different transition metal (TM)-organic fragments to extend the structures into three-dimensional frameworks. As nonenzymatic electrochemical sensor materials, - show good electrocatalytic activity, high sensitivity, and a low detection limit for detecting hydrogen peroxide (HO); possesses the highest sensitivity of 195.47 μA·mM·cm for HO detection. Most importantly, the average level of HO detection of these {AgPW}-based materials outperforms that of Na-centered Preyssler-type {NaPW} and most Keggin-type POM-based materials. The performances of such {AgPW} materials mainly stem from the unique advantage of high-negatively charged {AgPW} clusters together with the good synergistic effect between {AgPW} and TMs. This work expands on the research of high-efficiency POM-based nonenzymatic electrochemical HO sensors using Ag-containing POMs with high negative charges, which is also of great theoretical and practical significance to carry out health monitoring and environmental analysis.
四种基于多金属氧酸盐（POM）的有机-无机杂化化合物，即（Hbimb）H[((Mn(HO)(μ-bimb))(Mn(HO))(Mn(HO))(AgPWO))]·29HO ()、[(Cu(Hbimb)(HO)(μ-bimb)Cu(Hbimb)(HO))(Cu(HO)(μ-bimb)Cu(HO))((Cu(HO))(μ-bimb)(Cu(HO)))H(AgPWO)]·12.5HO ()、(Hbimb)H[(Zn(Hbimb)(HO)(Zn(Hbimb)(HO)))(AgPWO)]·12HO ()和(Hbimb)H[(Ag(HO))(Ag(Hbimb)Ag(Hbimb)(μ-bimb)Ag)(Ag(HO))(AgPWO)]·7HO ()（bimb = 1,4-双（1H-咪唑-1-基）苯），是用水热合成方法，以银为中心的 Preyssler 型 POM K[AgPWO]·18HO（简写为 K-{AgPW}）为前体合成的。在 - 中，通过不同的过渡金属（TM）-有机片段对{AgPW}簇进行修饰，将其扩展为三维框架，使 Ag 和{PW}单元的优点得以融合。作为非酶电化学传感器材料，-对过氧化氢（HO）具有良好的电催化活性、高灵敏度和低检测限；对 HO 的检测灵敏度最高，为 195.47 μA·mM·cm。最重要的是，这些基于{AgPW}的材料对 HO 的平均检测水平优于以 Na 为中心的 Preyssler 型{NaPW}和大多数 Keggin 型 POM 基材料。这些{AgPW}材料的性能主要源于高负电荷的{AgPW}簇的独特优势以及{AgPW}与 TM 之间的良好协同效应。这项工作扩展了使用高负电荷含 Ag 的 POM 作为高效基于 POM 的非酶电化学 HO 传感器的研究，对开展健康监测和环境分析具有重要的理论和实际意义。
