Department of Chemistry, Vidyasagar University, Midnapore, 721102, West Bengal, India.
J Fluoresc. 2022 May;32(3):1059-1071. doi: 10.1007/s10895-022-02929-y. Epub 2022 Mar 18.
A Fluorescent chemosensor based on pyrene scaffold, 5-diethylamino-2-(pyren-1-yliminomethyl)-phenol (PDS) is synthesized using condensation method. It displays novel aggregation-induced emission (AIE) phenomena in its aggregated/solid state. The AIE characteristic of PDS is studied in CHCN/HO mixtures at different volume percentage of water and morphology of the aggregated particles are investigated by DLS and optical fluorescence microscopic study. The probe is aggregated into ordered one-dimensional (1-D) rod like microcrystals and exhibit high efficiency of solid-state emission with green colour. By taking advantage of its interesting AIE feature, the aggregated hydrosol has been utilized as 'off-on' type fluorescence switching chemosensor with superb selectivity and sensitivity towards Cuions and the limit of detection (LOD) was calculated as low as 6.3 µM. A high Stern-Volmer quenching constant was estimated to be 2.88 × 10 M. The proposed chemosensor with AIE feature reveals a prospective view for the on-site visual recognition of Cu ions in fluorescent paper strips and the synthesized probe is also exploited to find out the concentration of Cuions in real water samples.
基于芘骨架的荧光化学传感器，5-二乙氨基-2-（芘-1-亚氨基甲基）-苯酚（PDS）是通过缩合方法合成的。它在聚集/固态时显示出新颖的聚集诱导发射（AIE）现象。在不同水体积百分比的 CHCN/HO 混合物中研究了 PDS 的 AIE 特性，并通过 DLS 和光学荧光显微镜研究了聚集颗粒的形态。探针聚集成长有序的一维（1-D）棒状微晶，并表现出高效的固态发射，呈现绿色。利用其有趣的 AIE 特性，聚集水溶胶被用作“开-关”型荧光开关化学传感器，对 Cu 离子具有出色的选择性和灵敏度，检测限（LOD）低至 6.3 µM。估计出高的 Stern-Volmer 猝灭常数为 2.88 × 10 M。具有 AIE 特性的拟议化学传感器为在荧光纸条上现场目视识别 Cu 离子提供了有前景的视角，并且还利用所合成的探针来确定实际水样中的 Cu 离子浓度。
