Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 214, Issue -, Pages 7-13Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2019.01.089
Keywords
Schiff base; Fluorescent-colorimetric chemosensor; Cr(III), Cu(II), Fe(III) and Al(III); Multi-ion probe
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Funding
- National Nature Science Foundation of China [21101013]
- Special Science Project of University of Science and Technology Beijing [FRF-BR-17-002B]
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A new Schiff base derivative fluorescence-colorimetric chemosensor 2-hydroxy-5-[(2-hydroxy-1-naphthyl) methylideneamino]benzoic acid (H3L), has been designed and synthesized. H3L displayed high selectivity and sensitivity for detecting Cr3+, Cu2+, Fe3+ and Al3+ ions in DMF/H2O (v/v = 1/1) solution. When Cr3+, Cu2+ or Fe3+ ionswere added, the solution of H3L inDMF/H2O exhibited different color changes. Whilewith the addition of Fe3+ or Al3+ ions, the solution of H3L in DMF/H2O displayed different fluorescence responses. The bonding modes and bonding ratios of H3L and metal ions were explored by the Job's plot, 1H NMR titration, and electrospray ionization mass spectrometry (ESI-MS). The detection limits of H3L with Cr3+, Cu2+, Fe3+ and Al3+ ions were 3.37 x 10(-7) M, 4.65 x 10(-7) M, 3.58 x 10(-7) M and 4.89 x 10(-7) M, respectively. (C) 2019 Elsevier B.V. All rights reserved.
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