...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Fluoride-selective colorimetric sensor based on thiourea binding site and anthraquinone reporter
【24h】

Fluoride-selective colorimetric sensor based on thiourea binding site and anthraquinone reporter

机译：基于硫脲结合位点和蒽醌报告基的氟选择性比色传感器

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A structurally simple colorimetric sensor, N-4-nitrobenzene-N'-1'-anthraquinone-thiourea (1), for anions was synthesized and characterized by H-1 NMR, ESI mass and IR methods. In acetonitrile, the addition of F- changed 1 solution from colorless to yellow. In the presence of other anions such as CH3CO2,- H2PO4-, HSO4- andCl(-), however, the absorption spectrum of 1 was slightly red shifted with no obvious color changes observed. The association constants of anionic complexes followed the order of F- CH3CO2_ > H2PO4- > HSO4- > Cl- > Br-, which was different from the order of anion basicity. AMI calculation results indicated that the most stable configuration of 1 existed in the Z-E-conformation with a six-membered ring via intramolecular hydrogen bond. This made thiourea moiety of 1 in an unfavorable conformation to bond with oxygen-anionic substrates such as CH3CO2- and H2PO4-, thus leading to a high selectivity and sensitivity for the detection of F-. (c) 2005 Elsevier B.V. All rights reserved.
机译：合成了一种结构简单的比色传感器N-4-硝基苯-N'-1'-蒽醌-硫脲（1），并通过H-1 NMR，ESI质量和IR方法对其进行了表征。在乙腈中，添加F-将1溶液从无色变为黄色。但是，在存在其他阴离子（例如CH3CO2，-H2PO4-，HSO4-和Cl（-））时，1的吸收光谱略有红移，没有观察到明显的颜色变化。阴离子络合物的缔合常数遵循F- CH3CO2_> H2PO4-> HSO4-> Cl-> Br-的顺序，这与阴离子碱性的顺序不同。 AMI计算结果表明，最稳定的1构型通过分子内氢键存在于具有六元环的Z-E构象中。这使硫脲部分以不利的构型与氧阴离子底物（如CH3CO2-和H2PO4-）键合，因此导致检测F-的高选择性和灵敏度。 （c）2005 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号