A facile fluorescent chemosensor based on naphthalene-derived Schiff base for zinc ions in aqueous solution

[摘要] A facile naphthalene-based Schiff base chemosensor, 1-((pyridin-2-ylmethylimino)methyl)naphthalen-2-ol (NS), has been designed and synthesized for selective detection of Zn2+ ions. A fluorescence enhancement of 10-fold at 446 nm can be realized upon addition of 5.0 equiv. of Zn2+ with excitation at 352 nm. NS could detect as low as 1.91 × 10−6 M Zn2+ with an association constant value of 7.88 × 106 M−1. More importantly, it displayed specific and sensitive recognition to Zn2+ and especially avoided the interference of Cd2+ in aqueous solution.

[学科分类] 分析化学