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

Two new Schiff base receptors 1 and 2 have been synthesized and characterized by FT-IR, HRMS and H-1 NMR spectroscopic techniques. Both the receptors show large fluorescence enhancement after addition of Al3+ which is recognized by calorimetry. Furthermore, the stability constant and the detection limit of the receptor-Al3+ complex were found to be 1.41 x 10(4) M-1 and 1.59 x 10(4) M-1; and 4.79 x 10(-8) M and 8.28 x 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 Al3+ qualitative as well as quantitative. (C) 2015 Elsevier B.V. All rights reserved.