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Citation: YU Mingquan, WU Xiaofu, DING Junqiao, WANG Lixiang. Fluorescent Film Sensor Based on Starburst Small Molecular Gelator with Tetraphenyl Arms for Highly Sensitive Detection of TNT Vapor[J]. Chinese Journal of Applied Chemistry, ;2015, 32(5): 604-610. doi: 10.11944/j.issn.1000-0518.2015.05.140334 shu

Fluorescent Film Sensor Based on Starburst Small Molecular Gelator with Tetraphenyl Arms for Highly Sensitive Detection of TNT Vapor

YU Mingquan ^a,b ,
WU Xiaofu ^a ,
DING Junqiao ^a,, ,
WANG Lixiang ^a,,

1.
a State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
b University of the Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: DING Junqiao, WANG Lixiang,
Received Date: 25 September 2014
Available Online: 23 December 2014
Fund Project: 国家重点基础研究发展计划(973计划)(2009CB623601) (973计划)(2009CB623601)国家自然科学基金资助项目(21174144,21204084,51322308,91333205) (21174144,21204084,51322308,91333205)

On the basis of a starburst small molecular gelator N5 which consists of a triphenylamine core,carbazole terminals and tetraphenyl arms,highly efficient fluorescent film sensors have been demonstrated for the detection of TNT saturated vapor.Different from the model compound N2 with monophenyl arms,compound N5 can easily form gels in benzene-containing solvents due to inter molecular π-π interactions caused by the presence of tetraphenyl groups.In addition,the obtained compound N5 film fabricated via spincoating from the toluene solution exhibits porous morphology with some nano-fibrous assemblies,favorable for the permeation of vapor molecules.As a result,when used as the film sensor for TNT vapor,compound N5 shows faster quenching response rate and higher quenching efficiency than those of compound N2.Most interestingly,its thickness nearly has no effect on the sensor property.Even for a 94 nm-thick film,the fluorescence can still be quenched by about 44% and 90% at 1min and 30min,respectively.
- fluorescence film sensor,
- gelator,
- tetraphenyl arm,
- nano-fibrous assembly,
- TNT
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