Porphyrin-doped mesoporous silica films for rapid TNT detection

被引：61

作者：

Tao S. ^{[1
]}

Li G. ^{[1
]}

机构：

[1] Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University

来源：

Colloid Polym. Sci. | 2007年 / 7卷 / 721-728期

关键词：

Mesoporous silica films; Porphyrin; Sol-gel chemistry; TNT detection;

D O I：

10.1007/s00396-007-1643-7

中图分类号：

学科分类号：

摘要：

Two kinds of porphyrin-doped silica films with mesoporous structures were fabricated using evaporation-introduced self-assembly approach and examined for chemosensor applications to detect explosive compounds such as 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), and nitrobenzene (NB). All synthesized silica films showed high fluorescence quenching sensitivity toward the vapors of TNT, DNT, and NB but is strongly dependent on pore structure. The silica film with three dimensional pore structure exhibits the highest quenching efficiency close to the quenching efficiency reported for emissive conjugated polymers, indicating these kinds of mesostructured composites are potentially useful chemosensory materials for rapidly detecting trace explosives. The preparation conditions, the structures of the resulting films, their sensing performances, and the fluorescence quenching mechanism were discussed in this paper. © Springer-Verlag 2007.

引用

页码：721 / 728

页数：7

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