Abstract
A novel Schiff base derivative (Z)-3-(4-(hexyloxy)phenyl)-2-(4-((E)-2-hydroxybenzylidene amino)phenyl)acrylonitrile (L) was designed, synthesized and characterized. L was used as a Zn2+ selective, turn-on, fluorescent chemosensor with a detection limit of 0.1 μM in DMF. 1:1 stoichiometric complex formation of L wih Zn2+ was confirmed through fluorescent titration experiments and Job’s plot. The enhancement of fluorescence intensity of L with addition of Zn2+ is the consequence of the inhibited isomerization of the C=N bond, namely chelation-enhanced fluorescence (CHEF) effect.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (21101001 and 61107014), the Natural Science Foundation of Anhui Province (1208085MB21), the 211 Project of Anhui University, and the Team for Scientific Innovation Foundation of Anhui Province (2006KJ007TD).
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Spectral data and calculated electron cloud distribution are given (figures S1–S5 and tables S1 and S2) which can be obtained from www.ias.ac.in/chemsci.
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DING, A., TANG, F., WANG, T. et al. A α-cyanostilbene-modified Schiff base as efficient turn-on fluorescent chemosensor for Zn2+ . J Chem Sci 127, 375–382 (2015). https://doi.org/10.1007/s12039-015-0787-0
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DOI: https://doi.org/10.1007/s12039-015-0787-0