Department of Materials Science and Chemical Engineering, Taiyuan University, Taiyuan 030000, P. R. China.
Inorg Chem. 2023 Mar 20;62(11):4485-4494. doi: 10.1021/acs.inorgchem.2c04197. Epub 2023 Mar 9.
A novel sulfur-bridged metal-organic framework (MOF) · based on thiacalix[4]arene derivatives was successfully obtained using a solvothermal method. Remarkably, adjacent ligands were linked via Co(II) cations to form a three-dimensional (3D) microporous architecture. Subsequently, was modified on a glassy carbon electrode () to produce an electrochemical sensor for the detection of heavy-metal ions (HMIs), namely, Cd, Pb, Cu, and Hg, in aqueous solutions. It was found that exhibited wide linear detection ranges of 0.10-17.00, 0.05-16.00, 0.05-10.00, and 0.80-15.00 μM for Cd, Pb, Cu, and Hg, respectively, in addition to low limit of detection (LOD) values of 0.017, 0.008, 0.016, and 0.007 μM. Moreover, the fabricated sensor employed for the simultaneous detection of these metals has achieved LOD values of 0.0067, 0.0027, 0.0064, and 0.0037 μM for Cd, Pb, Cu, and Hg, respectively. The sensor also exhibited satisfactory selectivity, reproducibility, and stability. Furthermore, the relative standard deviation (RSD) values of Cd, Pb, Cu, and Hg were 3.29, 3.73, 3.11, and 1.97%, respectively. Moreover, the fabricated sensor could sensitively detect HMIs in various environmental samples. The high performance of the sensor was attributed to its sulfur adsorption sites and abundant phenyl rings. Overall, the sensor described herein provides an efficient method for the determination of extremely low concentrations of HMIs in aqueous samples.
一种新型的硫桥联金属有机骨架（MOF），是基于硫代杯[4]芳烃衍生物，通过溶剂热法成功获得。值得注意的是，相邻的配体通过 Co(II) 阳离子连接，形成了一个三维（3D）微孔结构。随后，将 修饰在玻碳电极（）上，制备了一种电化学传感器，用于检测水溶液中的重金属离子（HMIs），即 Cd、Pb、Cu 和 Hg。结果表明，对于 Cd、Pb、Cu 和 Hg，分别表现出 0.10-17.00、0.05-16.00、0.05-10.00 和 0.80-15.00 μM 的宽线性检测范围，以及 0.017、0.008、0.016 和 0.007 μM 的低检测限（LOD）值。此外，用于同时检测这些金属的制备传感器已实现 0.0067、0.0027、0.0064 和 0.0037 μM 的 LOD 值，分别用于 Cd、Pb、Cu 和 Hg。该传感器还表现出良好的选择性、重现性和稳定性。此外，Cd、Pb、Cu 和 Hg 的相对标准偏差（RSD）值分别为 3.29%、3.73%、3.11%和 1.97%。此外，该制备传感器可以灵敏地检测各种环境样品中的 HMIs。传感器的高性能归因于其硫吸附位点和丰富的苯基环。总的来说，本文描述的传感器为水中痕量 HMIs 的测定提供了一种高效的方法。
