Imaging Science and Photochemistry ›› 2012, Vol. 30 ›› Issue (4): 251-259.DOI: 10.7517/j.issn.1674-0475.2012.04.251

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Celluloses Grafted with Fluorene-Benzene and Carbazole-Benzene Copolymer and Its Application to the Detection of Nitro-Aromatic

LENG Hong-fei, WU Wen-hui   

  1. School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, P.R.China
  • Received:2011-12-21 Revised:2012-03-27 Online:2012-07-15 Published:2012-07-15

Abstract: Sensing celluloses were prepared from fluorene-benzene and carbazole-benzene copolymer grafted to chemical modification of cellulose paper by Suzuki coupling reaction for the detection of nitro-aromatic explosives. Fluorescence quenching studies have shown that, the two kinds of sensor have higher fluorescence quenching efficiency than the thin film state, due to the modified cellulose have a high specific surface area and porosity structure, which are beneficial for the rapid diffusion of DNT vapor molecules. In addition, the two sensing cellulose have shown good fluorescence quenching efficiency after four quenching-recovery circles, which indicates that the sensing cellulose has a good fluorescence quenching reversibility and stability.

Key words: nitro-aromatics, chains aggregation, grafting, fluorescence quenching

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