A new Schiff base system bearing two naphthalene groups as fluorescent chemodosimeter for Zn 2+ ion and its logic gate behavior

Abstract

1-((E)-(2-((2-nitrobenzyl)(2-((E)-(2-hydroxynaphthalen-1-yl)methyleneamino)ethyl)amino)ethylimino)methyl)naphthalen-2-ol (H 2L), The new compound featuring two naphthalene units was synthesized and characterized. We find that H 2L has high selectivity and sensitivity to detect Zn 2+ ion over other metal ions such as Na +, Ag +, Cd 2+, Co 2+, Cr 3+, Cu 2+, Hg 2+, Mn 2+, Ni 2+, Fe 3+, and the sensitivity is about 10 −7 M. The fluorescent changes of H 2L upon the addition of cations Zn 2+ and triethylamine is utilized as an AND logic gate at the molecular level, using Zn 2+ and triethylamine as chemical inputs and the fluorescence intensity signal as output.