| 苯乙烯三嗪衍生物的合成及在重金属离子识别中的应用 |
| Synthesis of s-Triazine Derivatives and Application of Heavy Metal Ions Recognition |
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| 摘要: 合成了2,4-二(2-噻吩乙烯基)-6-(4'-N,N-二甲氨基苯乙烯基)-1,3,5-均三嗪(2)并鉴定了其结构。在乙腈-水混合介质中,化合物2在355和416nm处呈现双吸收峰,加入Cu2+,Hg2+和Fe3+后,均在520nm附近形成新的吸收峰。化合物2与Cu2+、Hg2+和Fe3+均形成1:1型配合物,其结合常数分别为1.9×105L·mol-1,6.6×103L·mol-1,2.7×103L·mol-1。对照化合物4与金属离子的光谱响应与化合物2相似,仅吸收峰的位置不同。因此,可认为化合物2和4中三嗪环中的N和噻吩环中的S与Cu2+、Hg2+和Fe3+共同配位形成了稳定的金属配合物。 |
| 关键词: 均三嗪苯乙烯衍生物 比色分析 Cu2+ Hg2+ Fe3+ |
| 基金项目: 国家自然科学基金(No.21365014)和江西省自然科学基金(No.20132BAB203011)资助项目。 |
| Abstract: Anew compound, namely 2,4-di(2-thiazole)-6-[2-(4-N,N-dimethylamino)phenylethenyl]-1,3,5-s-triazine (2), was synthesized and fully characterized. Compound 2 displayed double absorption peaks at 355 and 416 nm in the acetonitrile-water mixed medium. In the presence of various metal ions, a new absorption band peaking at 520 nm was appeared for Cu2+, Hg2+ and Fe3+ ions. The binding stoichiometry of compound 2 with Cu2+, Hg2+ and Fe3+ ions was 1:1 and the association constants were 1.9×105, 6.6×103 and 2.7×103 L·mol-1, respectively. Compound 4 exhibited similar spectral response to metal ions with compound 2. The binding mode for compounds 2 with these heavy metal ions was investigated using1H NMR spectral titration as well. The results suggested that Cu2+, Hg2+ and Fe3+ ions coordinated with the Natom of the triazine and the Satom of thiophene cooperatively. |
| Keywords: s-triazine derivatives colorimetric assay Cu2+ Hg2+ Fe3+ |
| 投稿时间：2013-03-29 修订日期：2013-06-09 |
| 摘要点击次数: 1540 |
| 全文下载次数: 1990 |
| 张华,徐孝武,吴芳英.苯乙烯三嗪衍生物的合成及在重金属离子识别中的应用[J].无机化学学报,2013,29(11):2394-2398. |
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