期刊
JOURNAL OF MATERIALS CHEMISTRY B
卷 10, 期 44, 页码 9235-9248出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2tb01828d
关键词
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资金
- National Natural Science Foundation of China [41867053]
- Jiangxi Science & Technology Normal University [2018BSQD021]
- Open Project Program of 2011 Collaborative Innovation center'' [2011KFGJ-202101]
A novel fluorescent sensor BTAE-PA containing two tetrarylethylene (TAE) units linked through pyrimidine-2-amine was prepared. The sensor exhibited aggregation-induced emission enhancement behavior and could be modulated by acid/base and metal ions. It showed high selectivity towards Al3+.
A novel fluorescent sensor BTAE-PA containing two tetrarylethylene (TAE) units linked through pyrimidine-2-amine was prepared, and its optical properties were systematically studied. BTAE-PA exhibited a typical aggregation-induced emission enhancement behavior, and its fluorescent properties could be efficiently modulated by acid/base and metal ions in THF. The protonated effect could induce significant acidichromism and 'turn-on' near-infrared emission with a large Stokes shift (Delta lambda = 225 nm). Furthermore, BTAE-PA was highly selective toward Al3+ with significant absorption (yellow -> orange) and fluorescence (green -> red) changes. A Job's plot established the 1 : 1 stoichiometry of the complex formation between BTAE-PA and Al3+, and the limit of detection for Al3+ was determined to be 1.30 x 10(-7) mol L-1. Finally, we also demonstrated that BTAE-PA could be made into test paper strips for 'naked-eye' detection of acid/Al3+, and fluorescence imaging experiments proved that BTAE-PA is capable of achieving cell imaging with good biocompatibility. Therefore, the multi-stimuli-responsive and multicoloured display performance of BTAE-PA endows the material with potential applications in security ink, acid/Al3+ sensing, and bio-imaging.
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