A novel fluorescent chemosensor based on a rhodamine 6G derivative for the detection of Pb<sup>2+</sup>ion
关键字：Lead compounds;Bins - Fluorescence - Ions - Lead - Physiology - Solutions;Binding ratio - Fluorescenceprobe - Fluorescent chemosensor - Limit of detection - Linear response - Recognition process - Rhodamine 6G - Visual detection
摘要：A new selective fluorescent chemosensor based on rhodamine 6G derivative (R1) has been designed and synthesized, which displayed highly selective and sensitive detecting for lead ion in aqueous solution. Sensor R1 was selective toward Pb<sup>2+</sup>ion by a light yellow to pink change for the visual detection of Pb<sup>2+</sup>ion. The fluorescence recognition processes of Pb<sup>2+</sup>was based on a binding induced ring-opening from the spirolactam (nonfluorescent) to acyclic xanthenes (fluorescent). Sensor R1 was excited with a 1:1 binding ratio and the linear response in the range of 1.0 × 10<sup>−8</sup>–1.0 × 10<sup>−5</sup> mol L<sup>−1</sup>with the limit of detection of 2.7 × 10<sup>−9</sup> mol L<sup>−1</sup>(3σ/slope). © 2017
卷号：246
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