Microwave-assisted synthesis of highly fluorescent nanoparticles of a melamine-based porous covalent organic framework for trace-level detection of nitroaromatic explosives

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• 作者：Wang Zhang^a ; Ling-Guang Qiu^a ; ^{lgqiu@ahu.edu.cn} ; ^{lgahu@163.com} ; Yu-Peng Yuan^a ; An-Jian Xie^a ; Yu-Hua Shen^a ; Jun-Fa Zhu^b
• 关键词：Porous polymeric networks ; Covalent organic frameworks ; Nanoparticles ; Explosive detection ; Fluorescence quenching
• 刊名：Journal of Hazardous Materials
• 出版年：2012
• 期刊代码：50_03043894
• 类别：ce
• 出版时间：30 June, 2012
• 卷：221-222
• 期：Complete
• 页码：147-154
• 文件大小：1256 K

摘要

Covalent organic frameworks (COFs) are a new generation of porous materials constructed from light elements linked by strong covalent bonds. Herein we present rapid preparation of highly fluorescent nanoparticles of a new type of COF, i.e. melamine-based porous polymeric network SNW-1, by a microwave-assisted synthesis route. Although the synthesis of SNW-1 has to be carried out at 180 掳C for 3 d under conventional reflux conditions, SNW-1 nanoparticles could be obtained in 6 h by using such a microwave-assisted method. The results obtained have clearly demonstrated that microwave-assisted synthesis is a simple yet highly efficient approach to nanoscale COFs or other porous polymeric materials. Remarkably, the as-synthesized SNW-1 nanoparticles exhibit extremely high sensitivity and selectivity, as well as fast response to nitroaromatic explosives such as 2,4,6-trinitrotoluene (TNT), 2,4,6-trinitrophenylmethylnitramine (Tetryl) and picric acid (PA) without interference by common organic solvents, which is due to the nanoscaled size and unique hierarchical porosity of such fluorescence-based sensing material.