A salicylal-derived Schiff base as Co (II) selective fluorescent probe

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• 作者：Jinling Zhang^aAuthor Vitae ; Yameng Liu^aAuthor Vitae ; Qiang Fei^aAuthor Vitae ; Hongyan Shan^aAuthor Vitae ; Fei Chen^bAuthor Vitae ; Qing Liu^aAuthor Vitae ; Guoping Chai^aAuthor Vitae ; Guodong Feng^aAuthor Vitae ; Yanfu Huan^a ; ^{yfhuan@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Schiff base ; Cobalt ; Fluorescence ; Probe ; Turn-on
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：239
• 期：Complete
• 页码：203-210
• 全文大小：1844 K

文摘

A salicylal-derived Schiff base L was synthesized and exploited as a fluorescence probe for its selective detection of Co²⁺. L exhibited enhanced fluorescence response at 350 nm for Co²⁺ in ethanol medium, distinguishing Co²⁺ from other cations with high selectivity. The formation of a 4:1 complex between L and Co²⁺ was suggested by Job’s Plot. Additionally, the fluorescence intensity was directly proportional to the concentration of Co²⁺ (R² = 0.9910) from 8.0 × 10⁻⁷ to 2.0 × 10⁻⁶ mol L⁻¹ with a detection limit of 7.82 × 10⁻⁷ mol L⁻¹ (3σ) under optimized conditions. The small molecular compound could be used as a promising fluorescent probe for monitoring levels of Co²⁺ in environmental and physiological systems.