• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Instant Visual Detection of Picogram Levels of Trinitrotoluene by Using Luminescent Metal-Organic Framework Gel-Coated Filter Paper
【24h】

Instant Visual Detection of Picogram Levels of Trinitrotoluene by Using Luminescent Metal-Organic Framework Gel-Coated Filter Paper

机译：发光金属有机骨架凝胶涂层滤纸即时视觉检测三硝基甲苯的皮克水平

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

There is an ongoing need for explosive detection strategies to uncover threats to human security including illegal transport and terrorist activities. The widespread military use of the explosive trinitrotoluene (TNT) for landmines poses another particular threat to human health in the form of contamination of the surrounding environment and groundwater. The detection of explosives, particularly at low picogram levels, by using a molecular sensor is seen as an important challenge. Herein, we report on the use of a fluorescent metal-organic framework hydrogel that exhibits a higher detection capability for TNT in the gel state compared with that in the solution state. A portable sensor prepared from filter paper coated by the hydrogel was able to detect TNT at the picogram level with a detection limit of 1.82 ppt (parts per trillon). Our results present a simple and new means to provide selective detection of TNT on a surface or in aqueous solution, as afforded by the unique molecular packing through the metal-organic framework structure in the gel formation and the associated photophysical properties. Furthermore, the rheological properties of the MOFbased gel were similar to those of a typical hydrogel.
机译：持续需要爆炸物探测策略以发现对人类安全的威胁，包括非法运输和恐怖活动。爆炸性的三硝基甲苯（TNT）被广泛用于地雷的军事用途，以对周围环境和地下水的污染形式，对人类健康构成另一种特殊威胁。通过使用分子传感器来检测炸药，特别是在皮克含量较低的情况下，被视为一项重大挑战。在本文中，我们报道了使用荧光金属-有机骨架水凝胶，该凝胶在溶液状态下对TNT的检测能力更高。由涂有水凝胶的滤纸制成的便携式传感器能够在皮克级检测到TNT，检测极限为1.82 ppt（每个龙胆份数）。我们的结果提出了一种简单而新颖的方法，可以选择性检测表面或水溶液中的TNT，这是通过凝胶形成过程中通过金属-有机骨架结构进行的独特分子堆积以及相关的光物理特性所提供的。此外，基于MOF的凝胶的流变特性与典型的水凝胶相似。

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