摘要
为了寻求可作为爆炸物检测的敏感材料,应用荧光分析技术研究了具有荧光特性的共轭小分子化合物2-(氯甲基)-4苯-基喹啉-3-甲酸乙酯(ECM PQ C)在微量硝基爆炸物存在下的荧光响应性,以及与不同浓度硝基爆炸物作用时的猝灭率。ECM PQ C与缺电子的硝基爆炸物TN T、H N S及HM X接触时,可发生电子转移使体系荧光猝灭,随着加入TN T溶液浓度的增大,ECM PQ C溶液的荧光强度逐渐降低,ECM PQ C有望作为爆炸物检测的敏感材料。通过氯仿、乙醇、丙酮溶剂对ECM PQ C荧光性质的研究表明,随着溶剂极性的增加,ECM PQ C荧光光谱的最大发射波长显著红移,在乙醇溶液中,ECM PQ C与硝基爆炸物因发生能量转移而生成激基复合物,其荧光光谱在365~450 nm处出现新峰。
In order to find sensing materials used for explosives detecting, fluorescence analysis technique was used to study the fluorescence response of the fluorescence of conjugated compounds with small molecular weight and fluorescent property ethyl 2-（ chloromethyl）-4-phenyl-quinoline-3-carboxylate （ ECMPQC ） to trace nitro-explosives in practice, and fluorescence quenching efficiency with various concentration of nitro-explosives. Electron transfer occurs when ECMPQC with nitro-explosives （ such as TNT, HNS and HMX） which are lack of electrons in their molecular structures. As a result,the fluorescence intensity decreases in this system and the f^uorescence intensity decreases with the concentration of TNT increasing. ECMPQC has potential application in nitro-explosives detection. The fluorescence property of ECMPQC was investigated in chloroform,acetone and ethanol. Results show that with the increase of solvent polarity,the bathochromic shift of the emission maximum wavelength becomes more remarkable. In ethanol,a new emissive band which is assigned to the formation of the exciplex is appeared in the region of 365 -450 nm in fluorescence spectrum between ECMPQC and nitro-explosives.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2012年第1期44-48,共5页
Chinese Journal of Energetic Materials
基金
中国工程物理研究院重点基金(2011A0302013)
关键词
有机化学
溶剂效应
荧光猝灭
爆炸物检测
organic chemistry
solvent effect
fluorescence quenching
explosive detection
