The high concentration of sulfide in environment does great harm to human beings’ health due to its toxicity, corrosivity, and disagreeable odor. Therefore, it's highly urgent to develop a simple, selective, and sensitive method for sulfide ion detection. In this work, we synthesized an iron porphyrin-based porous organic polymer (Fe-PPOP) through a facile Friedel-Crafts reaction. The structure of Fe-PPOP was confirmed through a series of methods, such as FT-IR, SEM, EDS, TEM, XPS and nitrogen physisorption. Fe-PPOP exhibited high oxidase-like activity, which could catalyze the oxidization of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue product (ox-TMB) in the presence of oxygen. With the addition of sulfide ion to the above system, the color of solution gradually changed from blue to colorless. Therefore, the Fe-PPOP/TMB system could be used for sulfide detection through a facile colorimetric method. The interference experiments using other similar ions verified the high selectivity of Fe-PPOP for sulfide detection. The limit of detection (LOD) of sulfide was calculated to be 1.08 μM. This work provided a promising method for sulfide measurement in environmental pollutants with high reliability and accuracy.

环境中高浓度的硫化物具有毒性、腐蚀性和难闻的气味，对人体健康危害极大。因此，开发一种简单、选择性、灵敏的硫化物离子检测方法迫在眉睫。在这项工作中，我们通过简单的 Friedel-Crafts 反应合成了一种基于铁卟啉的多孔有机聚合物 (Fe-PPOP)。Fe-PPOP的结构通过FT-IR、SEM、EDS、TEM、XPS和氮物理吸附等一系列方法得到证实。Fe-PPOP表现出较高的类氧化酶活性，可在氧气存在下催化无色3,3',5,5'-四甲基联苯胺（TMB）氧化为蓝色产物（ox-TMB）。随着上述体系中硫离子的加入，溶液的颜色逐渐由蓝色变为无色。所以，Fe-PPOP/TMB 系统可用于通过简便的比色法检测硫化物。使用其他类似离子的干扰实验验证了 Fe-PPOP 对硫化物检测的高选择性。硫化物的检测限 (LOD) 计算为 1.08 微米。这项工作为环境污染物中硫化物的测量提供了一种具有高可靠性和准确性的有前景的方法。