文献类型：期刊文献

英文题名：Rapid and Specific Aqueous-Phase Detection of Nitroaromatic Explosives with Inherent Porphyrin Recognition Sites in Metal Organic Frameworks

作者：Yang, Jian[1];Wang, Zhe[1];Hu, Kaili[2];Li, Yongsheng[1];Feng, Jianfang[2];Shi, Jianlin[1];Gu, Jinlou[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Shanghai Univ Tradit Chinese Med, Murad Res Ctr Modernized Chinese Med, Shanghai 201203, Peoples R China

年份：2015

卷号：7

期号：22

起止页码：11956

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20152500956286);WOS:【SCI-EXPANDED(收录号:WOS:000356316700030)】；

基金：This work was financially supported by the Natural Science Foundation of China (Grants 51072053 and 51372084), the Innovation Program of Shanghai Municipal Education Commission (Grant 13zz040), the Nano-Special Foundation for Shanghai Committee of Science and Technology (Grant 12 nm0502600), and the 111 Project (Grant B14018).

语种：英文

外文关键词：metal-organic frameworks; TNT detection; fluorescent sensors; aqueous phase; porphyrin

摘要：Development of a rapid and effective method for the detection of 2,4,6-trinitrotoluene (TNT) in aqueous phase has attracted great attention. In this work, the fluorescent porphyrin-based metal-organic frameworks (MOFs) of PCN-224 were successfully exploited as a fluorescent probe for the rapid and selective TNT detection in water media. This strategy combined the advantages of fluorescent porphyrin molecules and porous MOFs, which not only overcame the aggregation of hydrophobic tetrakis(4-carboxyphenyl)porphyrin (TCPP) recognition sites but also promoted TNT to interact with recognition sites in virtue of the high surface and intrinsic open structure of MOFs. As a result, a rapid response time of as short as 30 s was obtained for the elaborated fluorescent probe. Meanwhile, the bright red emission of porphyrin units in PCN-224 could be proportionally quenched in correlation with the applied TNT level through the formation of TNT-TCPP complex in the ground state. The specificity of the employed sensory platform for TNT recognition was scarcely affected by other possible coexistent interfering species. Furthermore, this fluorescent PCN-224 probe presented a much higher quenching efficiency for TNT than other structurally similar nitroaromatic compounds and was successfully applied for the quantitative detection of TNT in the mixed nitroaromatic explosive samples. This prefigured their great potentials of practical TNT detection in water media for public safety and security.