三苯胺类荧光探针对苦味酸的检测研究  

Triphenylamine-based fluorescent probe for the detection of picric acid

作　　者：马拉毛草 马恒昌[2] 

机构地区：[1]西北师范大学图书馆,甘肃兰州730070 [2]西北师范大学化学化工学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2017年第5期64-69,共6页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(21764012)

摘　　要：三苯胺(TPA)分子由三个苯环和含有一对孤对电子的氮原子连接而成,通过对外围苯环进行化学修饰,可以得到具有不同功能的三苯胺类衍生物.文中设计合成了以TPA为核,丙烯酸甲酯和4-羟基香豆素修饰的荧光分子,通过紫外光谱、荧光光谱研究了其发光性能,荧光分子在溶液中通过自组装形成超分子荧光探针,用于苦味酸(PA)的检测.结果表明,超分子聚合物荧光探针与PA之间的氢键作用是导致荧光猝灭的关键驱动力,由于分子之间氢键的存在,促进了分子间的电荷转移,最终导致荧光猝灭,荧光探针对PA的最低检测限和猝灭常数分别为400μg·L^(-1)和1.05×10~4 L·mol^(-1).Triphenylamine（TPA） is composed of three aromatic rings and nitrogen atoms with a pair of lone pair electrons,which can be appropriately modified to receive a series of luminescent materials with specific functions.A fluorescent molecule with TPA core is designed and synthesized,which is modified by 4-hydroxycoumarin and methyl acrylate.UV-vis and fluorescence is conducted to analyze their luminescence properties.These TPA derivatives can form supramolecular fluorescence probe by self-assembly in solution,which can be used to detect the picric acid（PA）.The results show that the primary force of fluorescence quenching is generated from the hydrogen bond between the supramolecular polymer fluorescent probe and PA.As a result of the existence of the hydrogen bond between molecules,the intermolecular charge transfer is promoted.The detection limit and quenching constant of fluorescence probe for PA are 400 μg·L^-1 and 1.05×10^4 L·mol^-1,respectively.

关 键 词：三苯胺 自组装 超分子聚合物 荧光探针 

分 类 号：O621.2[理学—有机化学]