Two novel Al3+ fluorescent-on probes based on thiazole substituted salicylaldehyde and its applications
Supramolecular Chemistry(2023)
摘要
In this study, two structurally similar 'turn on' fluorescent probes B1 and B2 with high binding energy with Al3+ were synthesised. With new thiazole substituted salicylaldehyde fluorophore, these two hosts also have good selectivity and sensitivity in the detection of Al3+ based on the chelating fluorescence-enhancing effect under test conditions. They show an extremely low detection limit, 0.478 nM and 4.04 nM, respectively, with binding constants of 2.34 x 10(6) M-1 and 1.36 x 10(6) M-1. A 1:1 binding ratio of dual probes to Al3+ was demonstrated by working curves and mass spectrometry. The mechanisms were confirmed by H-1 NMR and DFT calculations, defined that both two compounds combined with Al3+ by two oxygen atoms (one in C=O and another in -OH) and one nitrogen atom in -NH group to form triple coordination structure. Further application in test strips, actual soil and traditional Chinese medicine (TCM) suggest probes B1 and B2 have well application prospects in detecting Al3+.
更多查看译文
关键词
thiazole,salicylaldehyde,novel al,probes
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要