A small and robust Al(III)-chemosensor based on bis-Schiff base N, N′-(1,4-phenylenedimethylidyne)bis-1,4-benzene diamine

Abstract

A sensitive fluorescent chemosensor based on bis-Schiff base N, N′-(1,4-phenylenedimethylidyne) bis-1,4-benzenediamine (PMBA) was developed for detection of Al 3+ in aqueous solutions. A naked eye color variation from yellow to colorless is observed along with a remarkable fluorescence enhancement. A good linearity between the fluorescence intensity of the coordinate complex Al 3+-PMBA and the concentration of Al 3+ (0–30 μM/L), with a detection limit of 2 × 10 −6 M was established.