Open AccessSensitive detection of hazardous explosives via highly fluorescent crystalline porous aromatic frameworks
Author(s) -
Ye Yuan,
Hao Ren,
Fuxing Sun,
Xiaofei Jing,
Kun Cai,
XiaoJun Zhao,
Yue Wang,
Yen Wei,
Guangshan Zhu
Publication year - 2012
Publication title -
journal of materials chemistry
Language(s) - English
Resource type - Journals
eISSN - 1364-5501
pISSN - 0959-9428
DOI - 10.1039/c2jm35341e
Subject(s) - nitrobenzene , materials science , sorption , homo/lumo , explosive material , quantum yield , germanium oxide , fluorescence , quenching (fluorescence) , luminescence , germanium , powder diffraction , porosity , delocalized electron , chemical engineering , crystallography , chemistry , molecule , organic chemistry , adsorption , composite material , optoelectronics , optics , physics , engineering , silicon , catalysis
A three-dimensional (3D) porous aromatic framework (PAF-14) with high fluorescence quantum yield was synthesized from luminescent monomer of tetra(4-dihydroxyborylphenyl)germanium (TBPGe) building blocks. The powder X-ray diffraction (PXRD) analysis of the experimental and simulated patterns indicate that PAF-14 is highly crystalline with ctn topology. The Argon sorption measurement indicates that PAF-14 possesses high surface area (Brunauer Emmet Teller surface area: 1288 m2 g-1). Significantly, the introduction of germanium into PAF-14 skeletons may bring about a low-lying lowest unoccupied molecular orbital (LUMO) and the crystalline polymeric backbones enhance the sensitivity of electron delocalization. Therefore the designed PAF-14 exhibits high fluorescence quenching ability for hazardous explosives, such as nitrobenzene, 2,4-DNT (2,4-dinitrotoluene) and TNT (2,4,6-trinitrotoluene).Full Tex
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