Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (5): 599-605.DOI: 10.11944/j.issn.1000-0518.2016.05.150333

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“Naked-eye” and Fluorescence “Turn-on” Recognition of Al3+ Based on 2-Hydroxy-Naphthalene-Formaldehyde Benzoyl-Hydrazone Derivatives

CHEN Hongrong,WU Ya'nan,CHEN Shiyan,MA Peihua(),NI Xinlong()   

  1. Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province,Guizhou University,Guiyang 550025,China
  • Received:2015-09-10 Accepted:2015-12-24 Published:2016-04-29 Online:2016-04-29
  • Contact: MA Peihua,NI Xinlong
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21361006)

Abstract:

The probe 4-hydroxy-benzoyl-(2-hydroxy-naphthalene-formaldehyde) hydrazone(L) was synthesized and evaluated. The UV-Vis and fluorescence spectra suggested that probe L has highly Al3+-selective affinity over others commonly coexistent metal ions by fluorescence enhancing. Meanwhile, the color change of probe L solution after addition of Al3+ is obvious. 1H NMR titration, job-plot, and (MALDI-TOF) results indicate that the complex molar ratio of Al3+/L is 1:2. The binding constant of Al3+/L is calculated to be 1.3×104 L/mol by nonlinear curve-fitting based on the UV-Vis titration data, and the detection limit reaches 3.71×10-6 L/mol. The UV-Vis and fluorescence emission titration experiment show that a wide range and low detection limit can be achieved in the present sensing system. This result suggests that the probe L has potential application in determination of trace Al3+ ions.

Key words: hydroxy-naphthaldehyde, fluorescent chemosensor, “naked-eye&rdquo, recognition, aluminum ion