1,4-双(2-苯并咪唑基)苯对F-和Hg^2+识别性能的研究  

1,4-Bis(2-benzimidazolyl) benzene recognition behavior towards F^- and Hg^(2+)

作　　者：田盼盼 桑武堂 高静 赵秋月 魏薇 胡冰[1,2] TIAN Pan-pan;SANG Wu-tang;GAO Jing;ZHAO Qiu-yue;WEI Wei;HU Bing(College of Science,Gansu Agricultural University,Lanzhou 730070,China;Agricultural Resources Chemical and Applied Research Institute,Gansu Agricultural University,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学理学院,甘肃兰州730070 [2]甘肃农业大学,农业资源化学与应用研究所,甘肃兰州730070

出　　处：《化学研究与应用》2018年第8期1328-1335,共8页Chemical Research and Application

基　　金：甘肃省自然科学基金项目(1506RJYA017)资助;甘肃农业大学2017省级大学生创新创业训练计划项目(878)资助。

摘　　要：通过合成一种简单的苯并咪唑类主体分子并运用荧光光谱及~1H NMR考查其与十二种阳离子和九种阴离子的相互作用。研究表明,主体分子对阴离子中的F^-具有较好的单一选择性识别效果,荧光滴定和~1H NMR滴定数据表明主体与F^-通过氢键相互结合,对F^-的最低检测限为8.543×10-6mol·L-1。同时,主体分子对阳离子中的Hg^(2+)具有较好的单一选择性识别效果,通过荧光滴定、~1H NMR滴定、等摩尔连续变化法及质谱进一步证明了主体分子与Hg^(2+)以配位键1∶1结合形成了稳定的配合物,对Hg^(2+)的最低检测限为5.579×10-6mol·L-1。此外,制备了主体的荧光试纸,可实现对F^-和Hg^(2+)的快速、简便检测。A simple fluorescent chemosensor of benzimidazole derivatives was synthesized and fluorescence spectra and 1H NMR were studied with the twelve metal ions and nine anions.The researches showed that the host compound(M)had excellent fluorimetric specific selectivity for F-in DMSO solution.The fluorescence titration and 1H NMR titration showed that the M and F-were combined with hydrogen bonding and the detection limit of the sensor towards F-was 8.543×10-6 mol·L^-1.Meanwhile,M also had excellent fluorimetric specific selectivity for Hg 2+in DMSO solution.The fluorescence titration,1H NMR titration,Job’s plot and MS showed that the M and Hg 2+form a stable 1∶1 complex with the coordination bond and the detection limit of the sensor towards Hg 2+was 5.579×10-6 mol·L^-1.The test strips based on M were fabricated,which could act as a convenient and efficient F-/Hg 2+test kits.

关 键 词：苯并咪唑 阴阳离子识别 荧光传感 氟离子 汞离子 

分 类 号：O657.3[理学—分析化学]