| 以香豆素为基用以识别氟离子的新型比色化学传感器 |
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| 引用本文： | 郭航鸣,刘卫敏,盛瑞隆,王芳,汪鹏飞,吴世康.以香豆素为基用以识别氟离子的新型比色化学传感器[J].影像科学与光化学,2008,26(6):468-473. |
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| 作者姓名： | 郭航鸣 刘卫敏 盛瑞隆 王芳 汪鹏飞 吴世康 |
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| 作者单位： | 1. 金华职业技术师范学院,浙江,金华,321017
2. 中国科学院理化技术研究所,北京,100190 |
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| 基金项目： | 国家自然科学基金资助项目，中国科学院"百人计划" |
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| 摘 要： | 以香豆素作为发色团,胺基为氢键供体,以—C=N键桥连设计合成了可裸眼识别氟离子的化学传感器1,吸收光谱结果表明在乙腈中它可以高选择性识别氟离子,光谱红移70 nm,溶液颜色由橙色变为蓝紫色,而其它离子如Cl~-、Br~-、I~-、H_2PO_4~-、NO_3~-、HSO_4~-、AcO~-等均不影响其对氟离子的识别.通过核磁共振氢谱考察其识别机制,表明传感分子通过与F~-间的质子转移反应,使整个体系电子离域,分子内电荷转移更加显著,从而导致吸收光谱大幅红移.
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| 关 键 词： | 香豆素 氟离子 比色化学传感器 |
A New Fluoride Colorimetric Chemosensor Based on Coumarin |
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| Guo Hang-ming,LIU Wei-min,SHENG Rui-long,WANG Fang,WANG Peng-fei,WE Shi-kang.A New Fluoride Colorimetric Chemosensor Based on Coumarin[J].Imaging Science and Photochemistry,2008,26(6):468-473. |
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| Authors: | Guo Hang-ming LIU Wei-min SHENG Rui-long WANG Fang WANG Peng-fei WE Shi-kang |
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| Abstract: | A new fluoride colorimetric chemosensor 1 was designed and synthesized based on coumafin derivatives.A significant color change from pale pink to blueviolet was observed visually (naked-eye) upon addition of fluoride ions to a solution of compound 1 in acetonitrile,and other an- ions include Cl~-,Br~-,I~-,H_2PO_4~-,NO_3~-,HSO_4~-,AcO~-,almost have no changes.On the other hand,the F~- ion first establishes a hydrogen-bonding interaction with 1 and then on addition of more F~- ion,induces—N—H deprotonation,due to the formation of FHF]~-.The deprotona- tion process promotes intramolecular charge transfer of 1 and induces a red shift of its absorption spectrum. |
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| Keywords: | coumarin fluoride ions colorimetric chernosensor |
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