A new fluorescent chemosensor for detection of aluminium ions



A new Schiff base system (H2L) were synthesized and characterized by using of 2-hydroxy-1-naphthaldehyde and 2,6-diaminopyridine. The influence of metal cations Cr3+, Mn2+, Co2+, Cs+, Al3+, K+, Zn2+, Ni2+, Hg2+, Ba2+, Cu2+, Mg2+, Na+, Ag+, Cd2+,  Pb2+, Fe2+ and Fe3+ on the spectroscopic properties of the Schiff base (H2L) in ethanol (1µM) were investigated by means of absorption and emissions spectrophotometry. When increasing concentrations of Al3+ ions were introduced, the fluorescent emission of (H2L) was drastically increased. This special change was not observed when other metal ions were used. The Schiff base (H2L) was found to be as an effective fluorescence sensor for Al3+ ions.