Preparation of Sulfur-containing Porous Aromatic Framework Materials and Their Dual Performance in Ultra-sensitive Detection and Simultaneous Removal of Mercury
Hg/Hg(Ⅱ)is considered to be a highly toxic heavy metal to humans,and the preparation of new materials that can detect and remove toxic Hg2+simultaneously and efficiently is an important support for the control of mercury pollution.In this study,a sulfur-containing porous aromatic framework material(named LNU-19)was synthesized by Suzuki coupling reaction,and its conjugated structure and flexible thiophene-linked fragment significantly enhanced its luminescence ability,and the material had good porosity,specific surface area and high affinity chelating site(thiophene group),realizing the dual functional application of LNU-19 to Hg2+.LNU-19 has excellent sensing performance such as high sensitivity,good selectivity,good visibility and real-time response,and has an adsorption capacity of 121.3 mg/g for Hg2+.In this study,the introduction of thiophene sites and the regulation of the skeleton structure provided a new way to optimize and improve the preparation strategy of porous aromatic frameworks.
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