标题：Porphyrin-Based Porous Organic Polymer as Peroxidase Mimics for Sulfide-Ion Colorimetric Sensing
作者：Li, Yanhong; Fang, Yishan; Gao, Wenqiang; Guo, Xiaojun; Zhang, Xiaomei
作者机构：[Li, Yanhong; Gao, Wenqiang; Guo, Xiaojun; Zhang, Xiaomei] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China.; [Fang, Yis 更多
会议名称：24th Annual Green Chemistry and Engineering (GC&E) Conference
会议日期：JUN 15-19, 2020
来源：ACS SUSTAINABLE CHEMISTRY & ENGINEERING
关键词：porphyrin; porous organic polymers; hydrogen sulfide; peroxidase; nanozymes; colorimetric sensor
摘要：The effective synthesis of functional nanoplatforms for simple, selective, and sensitive hydrogen sulfide detection has received significant attention because of the toxicity of hydrogen sulfide. Here, a new porphyrin-based porous organic polymer, FePPOPEPA, was fabricated through a Pd-/CuI-catalyzed Sonogashira cross-coupling reaction between tris(4-ethynylphenyl)amine and iron(III) 5,10,15,20-tetrakis-(4'-bromophenyl)porphyrinato (FeTBrPP). Results showed that FePPOPEPA has a porous framework, high BET surface areas, wide pore size distribution, abundant surface catalytic active sites, and excellent stability as well as reusability. In the presence of H2O2, FePPOPEPA showed high peroxidase-like activity toward 3,3',5,5'-tetramethylbenzidine. Based on these findings, FePPOPEPA was used for the first time as an efficient colorimetric probe for sensitive and selective detection of sulfide ions with a low detection limit (0.013 mu M) within 3 min. The feasibility of this method for real water samples was validated via a standard addition experiment. Moreover, the catalytic inhibition mechanism of S2- to FePPOPEPA was disclosed by X-ray photoelectron spectroscopy spectra.