A simple schiff base based novel optical probe for aluminium (III) ions

Abstract

Two new Schiff base receptors 1 and 2 have been synthesized and characterized by FT-IR, HRMS and 1 H NMR spectroscopic techniques. Both the receptors show large fluorescence enhancement after addition of Al 3+ which is recognized by calorimetry. Furthermore, the stability constant and the detection limit of the receptor-Al 3+ complex were found to be 1.41 × 10 4 M -1 and 1.59 × 10 4 M -1; and 4.79 × 10 -8 M and 8.28 × 10 -8 M for receptors 1 and 2 respectively, concluded through the titration method. Not only this, the synthesized receptors work glowing in physiological pH range. Thus these receptors could be employed for the estimation of Al 3+ qualitative as well as quantitative.