Cu²⁺ fluorescent sensor based on mesoporous silica nanosphere

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• 作者：Deli Lu ; Juying Lei ; Zhidan Tian ; Lingzhi Wang ; ^{jlzhang@ecust.edu.cn} ; Jinlong Zhang ; ^{wlz@ecust.edu.cn}
• 关键词：Mesoporous silica nanosphere ; Anthracene ; Cu2+ ; Sensitivity ; Selectivity ; Reversibility
• 刊名：Dyes and Pigments
• 出版年：2012
• 出版时间：August, 2012
• 年：2012
• 卷：94
• 期：2
• 页码：239-246
• 全文大小：1198 K

文摘

Monodisperse mesoporous silica nanosphere (MSN) modified with anthracene derivative, 2-(3-(triethoxysilyl) propylamino)-N-(9-anthryl methyl) acetamide (SGAAn) has been fabricated as a fluorescent sensor (SGAAn-MSN) for the detection of metal ions, which shows an exclusive selectivity to Cu²⁺. Compared with SGAAn, SGAAn-MSN presents a higher sensitivity to Cu²⁺. The loading amount of SGAAn in MSN has a great influence on the detection sensitivity of SGAAn-MSN, which varies with the local concentration and accessibility of SGAAn in the pore channel of MSN. Interference studies indicate that the addition of other metal ions such as Ag⁺, Cd²⁺ and Pb²⁺ has a negligible effect on the selectivity of SGAAn-MSN to Cu²⁺. The possible mechanism for the sensing behavior of SGAAn-MSN to Cu²⁺ is proposed based on the relation between fluorescence quench degree and Cu²⁺ concentration.