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

A sensitive fluorescent chemosensor based on bis-Schiff base N,N′-(1,4-phenylenedimethylidyne) bis-1,4-benzenediamine (PMBA) was developed for detection of Al3+ 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 Al3+-PMBA and the concentration of Al3+ (0–30 μM/L), with a detection limit of 2 × 10−6 M was established.