| 2-氨基-5-(对二甲氨基)苯基-1,3,4-噻二唑:Hg~(2+)的选择性荧光传感分子; 2-Amino-5-(p-dimethylamino)phenyl-1,3,4-thiadiazole as a Selective Fluorescent Chemosensor for Hg~(2+) | |
| 廖琴仙 ; 李爱芳 ; 黎朝 ; 江云宝 | |
| 2008-12 | |
| 关键词 | 荧光传感 荧光猝灭 1,3,4-噻二唑 Fluorescent chemosensor Hg2+ Fluorescence quenching Intramolecular charge transfer 1, 3, 4-Thiadiazole |
| 英文摘要 | [中文摘要]设计合成了结构简单的分子内电荷转移荧光传感分子1,3,4-噻二唑类衍生物(1),实现了水-乙醇(体积比1∶9)混合溶剂中Hg2+的荧光猝灭型选择性灵敏传感,荧光猝灭常数达5.5×105mol-1.L,Hg2+线性响应范围为5.0×10-6～5.0×10-5mol/L.基于等摩尔连续变化法、红外光谱和核磁滴定实验结果提出了传感分子1与Hg2+的1∶1型结合模式,其中1-位S原子和2-位胺N原子为Hg2+配位原子;结合光谱变化讨论了Hg2+结合显著增强分子内电荷转移的荧光猝灭机理.[英文摘要]A structurally simple 2-amino-5-(p-dimethylamino)phenyl-1,3,4-thiadiazole(1)was designed and synthesized as a high selective fluorescent chemosensor for Hg2+ in H2O/EtOH(volume ratio 1∶9)solution.The selective quenching by Hg2+ of the fluorescence of compound 1 was rationalized in terms of the formation of a nonfluorescent Hg2+-1 complex with enhanced intramolecular charge transfer compared to compound 1 itself.The 1∶1 binding mode of compound 1 with Hg2+by its S atom and N atom of C-2 NH2 was proposed on the basisof Job plots, IR, and 1H NMR titrations. A linear fluorescent response was found for Hg2+ over 5.0×10-6 to 5.0×10-5 mol/L with a detection limit of 1.0×10-7 mol/L.; 国家自然科学基金(批准号:20425518,20835005)资助 |
| 语种 | 中文 |
| 出版者 | 《高等学校化学学报》编辑部 |
| 内容类型 | 期刊论文 |
| 源URL | [http://dspace.xmu.edu.cn/handle/2288/3212]  |
| 专题 | 化学化工－已发表论文 |
| 推荐引用方式 GB/T 7714 | 廖琴仙,李爱芳,黎朝,等. 2-氨基-5-(对二甲氨基)苯基-1,3,4-噻二唑:Hg~(2+)的选择性荧光传感分子, 2-Amino-5-(p-dimethylamino)phenyl-1,3,4-thiadiazole as a Selective Fluorescent Chemosensor for Hg~(2+)[J],2008. |
| APA | 廖琴仙,李爱芳,黎朝,&江云宝.(2008).2-氨基-5-(对二甲氨基)苯基-1,3,4-噻二唑:Hg~(2+)的选择性荧光传感分子.. |
| MLA | 廖琴仙,et al."2-氨基-5-(对二甲氨基)苯基-1,3,4-噻二唑:Hg~(2+)的选择性荧光传感分子".(2008). |
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