Abstract
A new 4,5-diazafluorene-based fluorescent chemosensor has been synthesized by Schiff base condensation of 9,9-bis(3,5-dimethyl-4-aminophenyl)-4,5-diazafluorene with salicylaldehyde. The interaction of Schiff base with different metal ions has been studied over photofluorescent spectra. The results showed that Schiff base exhibited 194-fold enhancements in fluorescence at 465 nm after Zn2+ ions. Such fluorescent responses could be detected by naked eye under UV-lamp. The complex solution (L-Zn2+) exhibited reversibility with EDTA.
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Acknowledgments
The authors are grateful for the research support from the National Natural Science Foundation of China (No. 21204033, No. 51103111), the Natural Science Foundation of Gansu Province (No. 1208RJYA016), Education Ministry of China (Program for NCET-12-0714), the Open Fund of the State Key Laboratory of Luminescent Materials and Devices (2014-skllmd-11).
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Li, H., Zhang, S., Gong, C. et al. A Turn-on and Reversible Fluorescence Sensor for Zinc Ion Based on 4,5-Diazafluorene Schiff Base. J Fluoresc 26, 1555–1561 (2016). https://doi.org/10.1007/s10895-016-1877-1
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DOI: https://doi.org/10.1007/s10895-016-1877-1