College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, PR China.
College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Feb 15;227:117585. doi: 10.1016/j.saa.2019.117585. Epub 2019 Oct 16.
We report the preparation of an organic-inorganic hybrid mesoporous material, PHC-SBA-15, derived from the coupling of a pyrene-based derivative PHC and mesoporous SBA-15 silica. Compared with the stable aggregation-induced emission (AIE) properties of PHC, those of PHC-SBA-15 were more promoted and active due to the fixation of PHC and the space limitation in mesoporous SBA-15. The aggregation and disaggregation activities can be tuned by controlling the concentrations in aqueous media and changing the fluorescence color from yellow to blue. In addition to the controllable AIE properties, PHC-SBA-15 was applied for the highly selective and sensitive detection of Hg through the fluorescence quenching of monomeric pyrene in aqueous media. The fluorescence intensity at 395 nm was linearly proportional to that of Hg in the concentration ranges of 0-1.0 × 10 and 1.0 × 10-10 × 10 M, showing a low detection limit of 1.02 × 10 M. This work provides an effective strategy for modulating the AIE properties from non-active to active by introducing AIE stable molecule into mesoporous silica material. This method also favors the development of fluorescent sensors for detecting targets with high sensitivity and selectivity in aqueous media with less synthetic difficulties.
我们报告了一种有机-无机杂化介孔材料 PHC-SBA-15 的制备，该材料由基于芘的衍生物 PHC 与介孔 SBA-15 硅烷偶联而成。与 PHC 的稳定聚集诱导发射（AIE）性质相比，由于 PHC 的固定和介孔 SBA-15 中的空间限制，PHC-SBA-15 的 AIE 性质得到了更显著的促进和增强。通过控制水相介质中的浓度和改变荧光颜色从黄色变为蓝色，可以调节聚集和解聚集活性。除了可控的 AIE 性质外，PHC-SBA-15 还可用于通过在水相介质中单体芘的荧光猝灭来高选择性和灵敏地检测 Hg。在 0-1.0×10 和 1.0×10-10×10 M 的浓度范围内，395nm 处的荧光强度与 Hg 的荧光强度呈线性关系，检测限低至 1.02×10 M。这项工作提供了一种有效的策略，通过将 AIE 稳定分子引入介孔硅材料，将 AIE 性质从不活跃调节为活跃。这种方法还有利于开发具有高灵敏度和选择性的荧光传感器，用于在水相中检测目标，而合成难度较小。
