Anhui Key Laboratory of Functional Coordination Compounds, Anhui Laboratory of Optical, Electrical and Magnetic Functional Materials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246011, PR China.
Anhui Key Laboratory of Functional Coordination Compounds, Anhui Laboratory of Optical, Electrical and Magnetic Functional Materials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246011, PR China.
Talanta. 2017 Apr 1;165:282-288. doi: 10.1016/j.talanta.2016.12.046. Epub 2016 Dec 23.
2,4,6-Trinitrophenol (TNP, also called picric acid, PA) pose a large threat to environmental health, public safety and military security. Conjugated microporous polymers are emerging new fluorescence sensing materials for TNP. In this paper, we report the synthesis of two fluorescein containing conjugated microporous polymers (DTF and TTF) through the palladium catalyzed Sonogashira-Hagihara polycondensation reactions of tetraiodofluorescein sodium salt (TIFA) with 1,4-diethynylbenzene (DEB) or 1,3,5-triethynylbenzene (TEB). DTF and TTF are porous with the BET surface areas of 705 and 712mg and exhibit high chemical and thermal stabilities. The formation of conjugated polymers with the incorporation of ethynyl groups leads to the fluorescent properties. The fluorescence quenching behaviors of DTF by nitroaromatic analytes in THF suspension are investigated. It is found that the fluorescence of DTF can be effectively quenched by 2,4,6-trinitrophenol over 2-nitrophenol (NP), 4-nitrotoluene (NT), nitrobenzene (NB), phenol (PhOH), p-dichlorobenzene (DClB) and 2,4-dinitrotoluene (DNT) with an SV constant of 2.08×10Lmol and a detection limit of 7.22×10molL (0.165mgL). In short, the DTF may be a new kind of fluorescence sensing material for detecting TNP.
2,4,6-三硝基苯酚（TNP，也称为苦味酸，PA）对环境健康、公共安全和军事安全构成了巨大威胁。共轭微孔聚合物是新兴的 TNP 荧光传感材料。在本文中，我们通过钯催化的 Sonogashira-Hagihara 缩聚反应，以四碘荧光素钠盐（TIFA）与 1,4-二乙炔基苯（DEB）或 1,3,5-三乙炔基苯（TEB）合成了两种含荧光素的共轭微孔聚合物（DTF 和 TTF）。DTF 和 TTF 具有多孔性，BET 表面积分别为 705 和 712mg，具有较高的化学和热稳定性。引入乙炔基形成共轭聚合物导致其具有荧光性质。在 THF 悬浮液中，研究了硝基芳烃分析物对 DTF 的荧光猝灭行为。结果发现，2,4,6-三硝基苯酚可以有效地猝灭 DTF 的荧光，而 2-硝基苯酚（NP）、4-硝基甲苯（NT）、硝基苯（NB）、苯酚（PhOH）、对二氯苯（DClB）和 2,4-二硝基甲苯（DNT）则不能。SV 常数为 2.08×10Lmol，检测限为 7.22×10molL（0.165mgL）。总之，DTF 可能是一种新型的用于检测 TNP 的荧光传感材料。
