8-Hydroxyquinoline-5-carbaldehyde Schiff-base as a highly selective and sensitive Al3+ sensor in weak acid aqueous medium

Abstract In the paper, a novel fluorescent sensor ( 1 ) based on 8-hydroxyquinoline carbaldehyde Schiff-base was synthesized and characterized. This fluorescent sensor exhibited high selectivity for Al 3+ over other metal ions with the detection limit reaching below 10 − 7  M under weak acid aqueous conditions. These suggested that 1 could be served as a highly selective and sensitive fluorescence sensor for aluminum ion in acid medium.