Preparation of monolayer-assembled fluorescent film and its sensing performances to hidden nitroaromatic explosives  

作　　者：LI HuiHui LU FengTing ZHANG ShuJuan HE Gang FANG Yu 

机构地区：[1]Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Materials Science,Shaanxi Normal University, Xi'an 710062, China

出　　处：《Chinese Science Bulletin》2008年第11期1644-1650,共7页

基　　金：the National Natural Science Foundation of China (Grant No. 20674048);the Ministry of Education of China (Grant Nos. 03148 and 306015);"863" Program from Ministry of Science;Technology of China (Grant No. 2007AA032349)

摘　　要：Pyrene was chemically assembled on a glass plate surface in a monolayer manner via spacers con-taining triethylenetetramine (TETA) subunits. It has been demonstrated that the fluorescence emission of the film is sensitive to the presence of trace amount of nitroaromatic compound (NAC) vapors. As discovered in the present work, the response selectivity of the pyrene-functionalized film depends on the length of the spacer, the vapor pressure of a given NAC, and the quencher size. The film shows faster response to those quenchers which have higher vapor pressure and smaller size. Compared to the film with shorter spacers, the present film with longer flexible spacers shows a slower response to the NACs, but higher selectivity to the quencher size. Additionally, the detection limits to common ex-plosives in vapor phase, 2,4,6-trinitrotoluene (TNT) and 2,4-dinitrotoluene (DNT), are 7.14×10-12 and 5.49×10-11 g·mL-1, respectively. Further examinations indicated that the sensing process is fully re-versible, and the vapors of those common interference such as benzene, toluene, ethanol, and perfume have little effect upon the sensing performances of the film.Pyrene was chemically assembled on a glass plate surface in a monolayer manner via spacers containing triethylenetetramine （TETA） subunits. It has been demonstrated that the fluorescence emission of the film is sensitive to the presence of trace amount of nitroaromatic compound （NAC） vapors. As discovered in the present work, the response selectivity of the pyrene-functionalized film depends on the length of the spacer, the vapor pressure of a given NAC, and the quencher size. The film shows faster response to those quenchers which have higher vapor pressure and smaller size. Compared to the film with shorter spacers, the present film with longer flexible spacers shows a slower response to the NACs, but higher selectivity to the quencher size. Additionally, the detection limits to common ex- plosives in vapor phase, 2,4,6-trinitrotoluene （TNT） and 2,4-dinitrotoluene （DNT）, are 7.14×10^-12 and 5.49×10^-11 g·mL^-1, respectively. Further examinations indicated that the sensing process is fully reversible, and the vapors of those common interference such as benzene, toluene, ethanol, and perfume have little effect upon the sensing performances of the film.

关 键 词：荧光薄膜 传感性能 单层自组装薄膜 硝基芳香物族化合物炸药 

分 类 号：O484.41[理学—固体物理]