高等学校化学学报Issue(4)：743-748,6.DOI:10.7503/cjcu20170495
季铵盐对碘代全氟烷烃的卤键吸附作用
Adsorption of Iodoperfluoroalkanes on Tetrabutyl Ammonium Halide by Halogen Bond
摘要
Abstract
The adsorption of 1,2-diiodotetrafluoroethane(C2F4I2)on tetrabutyl ammonium iodide(Bu4N+I-) was analyzed by IR, UV and 19F NMR spectroscopies. The according spectrum changes of IR, UV and 19F NMR indicated that halogen bond complexes were formed in solution, which demonstrated that the adsorption was due to the C—I…I-halogen bonding interactions. The adsorptivities of five quaternary ammoni-um salts were compared and the experiment results showed that adsorptivity was Bu4N+Cl->Bu4N+Br->Bu4N+I-. Hexadecyl trimethyl ammonium chloride and hexadecyl trimethyl ammonium bromide, which have long alkyl chain,had absolutely no adsorption to C2F4I2. It is probably because that the long alkyl chains pre-vented halide anion from closing to C2F4I2. The adsorption of four iodoperfluoroalkanes(C4F8I2,C4F9I,C6F12 I2, C6F13I)by Bu4N+Cl-salt were investigated. The results showed that although halogen bonds in the monoiodoperfluoroalkanes(monoiodo-PFAs)complexes were stronger than those in the diiodoperfluoroalkanes (diiodo-PFAs)complexes as estimated by Raman spectra in solution, the adsorptivities of Bu4N+Cl-for the diiodo-PFAs were stronger than those for the monoiodo-PFAs at the solid/liquid interface because the odds of forming halogen bond of diiodo-PFAs is double that of monoiodo-PFAs. Besides, it was found that the formation of halogen bonds could enhance the Raman signals of iodoperfluoroalkanes.关键词
卤键/碘代全氟烷烃/季铵盐/卤阴离子/吸附Key words
Halogen bond/Iodoperfluoroalkane/Tetrabutyl ammonium halide/Halide anion/Adsorption分类
化学化工引用本文复制引用
阎小青,刘秋双,刘云凤,牛侨..季铵盐对碘代全氟烷烃的卤键吸附作用[J].高等学校化学学报,2018,(4):743-748,6.基金项目
国家自然科学基金(批准号:81502851)、中国博士后科学基金(批准号:2014M561208)和山西医科大学博士启动基金(批准号:055235)资助.Supported by the National Natural Science Foundation of China(No.81502851),the China Postdoctoral Science Foundation(No.2014M561208)and the Startup Foundation for Doctors of Shanxi Medical University,China(No.055235) （批准号:81502851）
