Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, Odisha 768018, India.
School of Chemical Science, NISER, Bhubaneswar, Odisha 752050, India.
Methods. 2023 Nov;219:127-138. doi: 10.1016/j.ymeth.2023.10.006. Epub 2023 Oct 12.
This manuscript introduces a pyrene-based Schiff base L by reacting pyrenecarboxaldehyde with 2-aminothiazole in equimolar ratio. The ligand L was characterized by various spectral data and single crystal. The water sensing ability of L was examined in different organic solvents. The weakly emissive L in DMSO showed a fluorescence enhancement upon the addition of water. The water-induced fluorescence enhancement of L was occurred due to the combined effect of aggregation-induced emission (AIE) phenomenon and suppression of photo-induced electron transfer (PET) process. Using L, the water in DMSO can be detected down to 0.50 wt% with a quantification limit of 1.52 wt%. The analytical novelty of the developed sensor L was validated by detecting moisture in a variety of raw food products.
本文通过等摩尔比的吡喃甲醛与 2-氨基噻唑反应，引入了一种基于吡喃的席夫碱 L。通过各种光谱数据和单晶对配体 L 进行了表征。考察了 L 在不同有机溶剂中的水敏性。在 DMSO 中弱发光的 L 在加入水后表现出荧光增强。L 的水诱导荧光增强是由于聚集诱导发射（AIE）现象和光诱导电子转移（PET）过程抑制的综合作用所致。使用 L，可以在 DMSO 中检测到低至 0.50wt%的水，定量限为 1.52wt%。通过检测各种原料食品中的水分，验证了所开发的传感器 L 的分析新颖性。
