Halide selective anion recognition by an amide-triazolium axle containing [2]rotaxane
作者:Nicholas G. White、Ana R. Colaço、Igor Marques、Vítor Félix、Paul D. Beer
DOI:10.1039/c4ob00801d
日期:——
A new rotaxane containing the 3-amido-phenyl-triazolium group incorporated into the interlocked structure's axle component has been prepared by a chloride anion templated clipping strategy. Proton NMR titration experiments reveal that the interlocked host displays a high degree of halide anion recognition in competitive 1 : 1 CDCl3–CD3OD solvent mixture. Chloride and bromide anions are bound strongly
一种新的含有3-氨基-苯基-三唑鎓基团并结合到互锁结构的车轴组件中的轮烷已经通过氯离子阴离子模板化的剪切策略制备出来。质子NMR滴定实验表明,互锁的主体在竞争性1:1 CDCl 3 -CD 3中显示出高度的卤化物阴离子识别能力OD溶剂混合物。氯化物和溴化物的阴离子牢固且选择性地结合,观察到的更大,更碱性的含氧阴离子,乙酸根和磷酸二氢的络合作用可忽略不计。对相关的轴基序3-酰胺基-苯基-三唑鎓,吡啶基双三唑和吡啶基双酰胺进行了密度泛函理论计算,结果表明,新的轮烷烷烃基序显示的氧代阴离子结合力比吡啶基体系弱得多。