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高对称性Mg–MOFs材料的设计合成及荧光传感性能研究
Design of High-Symmetrical Magnesium-Organic Frameworks and Their Fluorescence Sensing Performance
【Author】 Xiao-Juan Lei;Quan-Guo Zhai;Key Laboratory of Macromolecular Science of Shaanxi Province,School of Chemistry & Chemical Engineering,Shaanxi Normal University;
【机构】 陕西省大分子科学重点实验室陕西师范大学化学化工学院;
【摘要】 针对镁离子的配位过程易受到含氧溶剂分子影响而降低Mg-MOFs整体对称性的特点,本文采用乙酸作为调节剂,选择具有荧光发射特性的H3BTB和H2FDA配体,与金属镁通过溶剂热反应成功设计合成了两例高对称性Mg-MOFs材料:{[(CH3)NH3]4[Mg3(BTB)8/3(Ac)2(H2O)]}n (SNNU-35)和{[(CH3)2NH2][Mg2(FDA)2(Ac)]}n (SNNU-36)。SNNU-35和-36均具有较高的稳定性和较强的荧光发射特性,且对硝基化合物具有优异的选择性荧光传感性能。两例Mg-MOFs对硝基苯(NB)和邻硝基甲苯(2-NT)都具有很高的敏感性,对NB(5000 ppm)和2-NT(8000 ppm)的荧光猝灭效率分别为96.3%/89.5%(SNNU-35)和85.0%/83.7%(SNNU-36),而对硝基甲烷(NM)基本无荧光响应。
【Abstract】 In this work,we demonstrate that acetate (Ac) can act as modulator to eliminate the influence of amide solvent and improve the symmetry of Mg-organic frameworks.Two high-symmetrical Mg-MOFs both show fast and quantative sensing performance for nitrocompounds.Among three selected models of substrate,SNNU-35 and-36can eliminate the interference of nitromethane (NM) and exhibit high sensitivity to nitrobenzene (NB) and onitrotoluene (2-NT) with large ksv values (>105 M-1).Specially,the fluorescence quenching efficiency of NB (5000ppm) and 2-NT (8000 ppm) can reach 96.3%and 89.5%,and 85.0%and 83.7%for SNNU-35 and-36,respectively.This work offers not only an effective route to improve the symmetry of magnesium-organic frameworks but also two potential fluorescence sensors for nitroaromatic compounds.
- 【会议录名称】 中国化学会第十五届固态化学与无机合成学术会议摘要册
- 【会议名称】中国化学会第十五届固态化学与无机合成学术会议
- 【会议时间】2018-11-09
- 【会议地点】中国福建福州
- 【分类号】O641.4;O657.3
- 【主办单位】中国化学会