期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 221, 期 -, 页码 147-154出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2012.04.025
关键词
Porous polymeric networks; Covalent organic frameworks; Nanoparticles; Explosive detection; Fluorescence quenching
资金
- National Natural Science Foundation of China (NSFC) [20971001]
- NSFC-CAS [10979014]
- Program for New Century Excellent Talents in University
- Ministry of Education, China [NCET-08-0617]
- Anhui University
- NSFC [20873128]
- Chinese Academy of Sciences
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 degrees 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. (C) 2012 Elsevier B.V. All rights reserved.
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