期刊
TETRAHEDRON LETTERS
卷 57, 期 44, 页码 4898-4904出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2016.09.058
关键词
Chromone; Fluorescent probe; Aluminum ion; Selectivity; Sensitivity
资金
- National Natural Science Foundation of China [81171337]
- Gansu NSF [1308RJZA115]
In this study, a novel chromone-derived Schiff-base ligand which was called bis(6-hydroxychromone-3-methylidene)-o-phenylenediimine (1) was designed, synthesized, and evaluated as an Al3+ turn on fluorescent probe. This probe 1 showed good selectivity and high sensitivity towards Al3+ in the presence of most metal ions, and a remarkable enhancement by about 30.91-fold in fluorescence emission intensity at 459 nm was observed with addition of 1 equiv of Al3+, which was attributed to the inhibition of photoinduced electron-transfer (PET) phenomenon and C=N isomerization process at the excited state. Moreover, the fluorescence response of 1 to Al3+ was nearly completed within 10 min. Thus, this probe 1 could be utilized for sensing and monitoring Al3+ in environmental and biological systems for real-time detection. (C) 2016 Elsevier Ltd. All rights reserved.
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