新型多孔芳香骨架材料用于硝基爆炸物的检测  

Novel fluorescent porous aromatic framework used in nitro compounds monitoring

作　　者：王桂芝[1,2] 白立军[1] 梁克瑞[1] 元野[2] 

机构地区：[1]吉林工业职业技术学院质量与安全系,吉林吉林132013 [2]东北师范大学化学学院,吉林长春130024

出　　处：《分子科学学报》2016年第3期242-247,共6页Journal of Molecular Science

基　　金：吉林省教育厅2014年度职业教育与成人教育教学改革研究课题(2014ZCY120)

摘　　要：采用付玫瑰苯胺与对苯二甲醛通过希夫碱偶联反应制备了新型的多孔芳香骨架材料.经过FTIR,TGA,PXRD,SEM,TEM和Ar吸附等分析方法对多孔芳香骨架材料的成键方式和骨架结构进行了表征.分析结果显示,该多孔芳香骨架材料具有优异的热稳定性(350℃仅失重5%)和溶剂稳定性,其Langmuir比表面积约为472m^2/g.紫外光谱和荧光光谱测试分析表明,该材料在苯、甲苯和氯苯等芳香化合物环境中无明显的荧光强度变化.然而在硝基爆炸物环境中会发生灵敏的、专一的荧光淬灭现象.该多孔材料可应用于硝基爆炸物的检测.The novel fluorescent porous aromatic framework was prepared by the Schiff＇s base coupling reaction with terephthaldehyde and pararosaniline base as reactants. From the weakened of the intense（N—H） in the FT-IR spectrum, the formation of coupling reaction can be preliminarily confirmed. PXRD was carried out to investigate the crystallinity of porous aromatic framework, which indicates its amorphous texture. The no long-range structure could be caused by the distortion and interpenetration of the oligomeric fragment. SEM image showed the porous aromatic framework are continuous particles. TEM also agreed with that the porous material possess no ordered structure. The material was stable up to 350 ℃, which suggests that the porous aromatic framework possess high thermal stability. Moreover, the porous material also exhibits high solvent stability. The Ar sorption isotherm was measured at 87 K to characterize the porous quality of the polymer network. The polymer gives rise to typeⅠ argon gas sorption isotherm with a distinct hysteresis for the whole range of relative pressure. When the Langmuir model is adopted, the apparent surface area of porous aromatic framework is 472 m2/g. What＇s more, the porous aromatic framework exhibits interesting fluorescent quality. It shows the unique quenching effect to nitro compounds from benzene, toluene, chlorobenzene, bromobenzene and phenol. Besides, its sensitivity is much better than the MOF-1, Zn-MOF and PAF-15 materials.

关 键 词：多孔芳香骨架材料 硝基爆炸物 荧光性 灵敏度 专一性检测 

分 类 号：O633[理学—高分子化学]