摘要
咪唑鎓本身带有正电荷,2-位碳氢(C2-H)具有一定的酸性,是一种良好的氢键供体,能与阴离子形成氢键。因此,咪唑鎓可以识别各种无机阴离子和生物体内重要的阴离子。本文利用四(1-咪唑甲基)甲烷的独特结构,通过烷基化反应,合成了多咪唑鎓盐2、含有多功能臂的双咪唑鎓盐3和咪唑鎓环番4。采用荧光发射光谱法研究了咪唑鎓盐2、3、4对阴离子(Cl^-、Br^-、I^-、CH_3COO^-、PhCOO^-、HSO_4^-)的光谱响应。结果表明,咪唑鎓盐2和咪唑鎓环番4a加入Cl^-,荧光强度明显增强;咪唑鎓盐3a加入PhCOO^-,荧光强度明显减弱;咪唑鎓盐3b和咪唑鎓环番4b加入I^-,荧光强度明显增强。
The imidazolium group is an attractive building block for anion receptors because in contributes a positive charge and relatively acidic C2-hydrogen. By the use of tetra( 1-imidazolylmethyl) methane 1,we designed a series of novel imidazoliums with alkylating reagents,including imidazolium 2,the open chain bis-imidazolium salt 3,imidazolium cyclophane 4. The spectral response of compound 2,3,4 to anion was further determined by fluorescence spectra. The results showed that imidazolium 2 and imidazolium cyclophane 4 a have a better selectivity for Cl-,bisimidazolium 3 a has definite recognition ability to PhCOO-,bisimidazolium 3 b and imidazolium cyclophane 4 b have a better selectivity for I-.
作者
李鹏熙
蒋宗林
陈本寿
任涛
Li Pengxi;Jiang Zonglin;Chen Benshou;Ren Tao(School of Chemistry and Chemical Engineering,China West Normal University,Nanchong 637009;School of Environment and Quality Test,Chongqing Chemical Industry Vocational College,Chongqing 401228)
出处
《化学通报》
CAS
CSCD
北大核心
2018年第8期734-738,共5页
Chemistry
基金
重庆市基础与前沿研究计划项目(cstc2016jcyj A0075)
四川省教育厅自然科学基金重点项目(13ZA0009)
重庆市长寿区科技计划项目(CS2017006)资助
关键词
咪唑鎓
环番
阴离子识别
荧光发射光谱
Imidazolium
Cyclophane
Anion recognition
Fluorescence spectrum