As one of the most toxic heavy metal ions, Hg²⁺ exists widely in the living surroundings of human beings and excessive Hg²⁺ possesses a great threat to human health. The maximum allowable concentration of Hg²⁺ in drinking water is only 10 nM (2 ppb) by U.S. EPA standard. Ionic metal-organic framework (iMOF) is considered in view of high sensitive, anti-interferential material for Hg²⁺ detection still remain a challenge. Herein we designed and synthesized a novel Zn based anionic MOF Zn-TPTC, which was characterized by single crystal diffraction and other method. Its performance on Hg²⁺ (10^-6–10^-4 M) detection were studied and the detection limit (LOD) is calculated as low as 3.67 nM. Interference experiments showed that Zn-TPTC could exclude the interference of other ions, which could be attributed to the effective pore size, anionic framework and multiple N sites in ligand, providing us new ideas for the selection and design of MOF for detection application.

Hg ²⁺作为毒性最高的重金属离子之一，广泛存在于人类的生活环境中，过量的Hg ²⁺对人体健康构成极大威胁。根据美国EPA标准，饮用水中Hg ²⁺的最大允许浓度仅为10 nM（2 ppb）。考虑到用于Hg ²⁺检测的高灵敏度，抗干扰材料，仍然需要离子金属有机框架（iMOF）。本文设计并合成了一种新颖的基于锌的阴离子型MOF Zn-TPTC ，并通过单晶衍射和其他方法对其进行了表征。在Hg ²⁺（10 ^-6 –10 ^-4对M）检测进行了研究，计算出的检测限（LOD）低至3.67 nM。干扰实验表明，Zn-TPTC可以排除其他离子的干扰，这可以归因于有效孔径，阴离子骨架和配体中的多个N位点，为检测应用的MOF的选择和设计提供了新思路。