College of Chemistry and Chemical Engineering, Henan Key Laboratory of Function-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, PR China.
Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry & Environment, South China Normal University, Guangzhou 510006, China.
Mater Sci Eng C Mater Biol Appl. 2019 Jun;99:1092-1098. doi: 10.1016/j.msec.2019.02.068. Epub 2019 Feb 19.
The employment of aggregation induced emission (AIE) species for detecting analytes has become ubiquitous in many applications ranging from environmental monitoring to novel chemical sensing processes. Herein, a new organic building block (4,4',4″,4″'-(ethene-1,1,2,2-trayltetrakis (benzene-4,1-diyl))tetrakis(1-methylpyridin-1-ium) boric acid (TPE-B)) has been synthesized and such chromophore exhibits very weak emission in aqueous solution. The molecule-surfactant interaction can lead to distinguished yellow emissions and the incorporation of sodium dodecyl sulfonate (SDS) will generate morphological changes from irregular organic clusters to aggregated nanoparticles with the size of 45 nm. A six-fold intensity enhancement has been observed and the electrostatic forces are believed to act as the primary role for the selective response to SDS. Based on the in situ established TPE-B-SDS framework, a switched-off effect has been observed in the presence of ClO and this signal change will allow us to accurately determine the concentration of such reactive oxygen species (ClO). The limits of detection for SDS and ClO are calculated to be 54.2 nM and 14.2 nM, respectively. These excellent optical properties have been extended into practical range and the results for the detection of SDS and ClO in tap water samples are satisfactory. It is anticipated that the responsive probe will provide deeper insights into multi-targets sensing in extensive systems.
聚集诱导发光（AIE）物种在检测分析物方面的应用已经无处不在，从环境监测到新型化学传感过程等诸多应用中都有涉及。在此，我们合成了一种新的有机构筑块（4,4',4″,4″'-(乙烯-1,1,2,2-四基)四(苯-4,1-二基)四(1-甲基吡啶-1-鎓)硼酸（TPE-B）），该发色团在水溶液中发射非常弱。分子-表面活性剂相互作用可以导致明显的黄色发射，并且加入十二烷基磺酸钠（SDS）将导致形态从不规则的有机簇转变为尺寸为 45nm 的聚集纳米颗粒。观察到六倍的强度增强，并且相信静电相互作用是对 SDS 选择性响应的主要作用。基于原位建立的 TPE-B-SDS 框架，在 ClO 的存在下观察到关闭效应，这种信号变化将允许我们准确地确定此类活性氧物质（ClO）的浓度。SDS 和 ClO 的检测限分别计算为 54.2nM 和 14.2nM。这些优异的光学性能已经扩展到实际范围，并且在自来水中 SDS 和 ClO 的检测结果令人满意。预计响应性探针将为广泛体系中的多目标传感提供更深入的见解。
