含脲苯并咪唑鎓类离子液体的合成及阴离子识别性能  

Synthesis of Benzimidazolium-urea Receptors and Their Anion Recognition Properties

作　　者：董智云[1] 江小枝[1] 张大卫[1] 高国华[1] 

机构地区：[1]上海市绿色化学与化工过程绿色化重点实验室,华东师范大学化学系,上海200062

出　　处：《高等学校化学学报》2012年第10期2256-2262,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21072061);上海市重点学科建设项目(批准号:B409)资助

摘　　要：设计并合成了含脲苯并咪唑鎓离子液体受体分子1～3,利用紫外-可见光谱、荧光光谱和1H NMR滴定研究了其对F-,Cl-,Br-,I-,CH3COO-,HSO4-,H2PO4-等阴离子的识别性能.紫外-可见光谱研究发现,受体分子1～3可选择性地识别F-,并形成1∶1型主客体配合物;荧光光谱研究发现,受体分子1～3对碱性阴离子有较好的识别作用,主客体结合常数的顺序为H2PO4->CH3COO-≈F->HSO4-≈Cl->Br-≈I-;1H NMR滴定研究发现,该类受体分子以咪唑2位CH和脲基NH与阴离子通过氢键结合,但高浓度的F-会导致受体分子发生脱质子作用.Due to the fundamental roles that anions play in a wide range of chemical and biological processes, numerous efforts have been devoted to the design of receptors capable of selectively binding and sensing anions. Herein, three benzimidazolium-urea receptors were designed and synthesized. The interaction between these receptors and various anions（F-, CI-, Br-, I-, CH3COO-, HSO4-, HEPO4-） were studied by UV-Vis spectrum, fluorescence spectrum and ^1H NMR. The results demonstrate that the receptors and anions form 1 ： 1 complex, and the receptors display a strong （C--H） ＋ ... X-, N-H… X hydrogen bonds and charge- charge interactions in anion recognition.

关 键 词：苯并咪唑鎓 脲基 阴离子识别 离子液体 

分 类 号：O625.6[理学—有机化学] O657.3[理学—化学]