A [2]catenane containing an upper-rim functionalized calix[4]arene for anion recognition
摘要:
A novel [2]catenane is synthesized in good yield from an upper-rim functionalized calix[4]arene macro-bicycle and a nitro-substituted isophthalamide threading component in the presence of a chloride anion template via a ring-closing metathesis (RCM) reaction. After halide anion template removal the resulting catenane host exhibits a high degree of selectivity for chloride in competitive organic solvent mixtures. (C) 2009 Elsevier Ltd. All rights reserved.
Neutral redox-active hydrogen- and halogen-bonding [2]rotaxanes for the electrochemical sensing of chloride
作者:Jason Y. C. Lim、Matthew J. Cunningham、Jason J. Davis、Paul D. Beer
DOI:10.1039/c4dt02591a
日期:——
redox-active ferrocene-functionalised neutral [2]rotaxanes have been synthesised via chloride aniontemplation. 1H NMR spectroscopic titrations reveal that these [2]rotaxane host systems recognize chloride selectively over other halides and oxoanions in highly-competitive aqueous media. By replacing the hydrogenbonding prototriazole units of the rotaxane axle component with iodotriazole halogen bond-donor
氧化还原活性的二茂铁官能化的中性[2]轮烷的第一个实例已通过氯离子阴离子模板法合成。1 H NMR光谱滴定表明,在竞争激烈的水性介质中,这些[2]轮烷主系统选择性识别氯离子,而不是其他卤化物和氧阴离子。通过用碘代三唑卤素键-给体基团代替轮烷轴组分的氢键合原三唑单元,可以调节[2]轮烷的氯化物选择性。电化学伏安法实验表明,轮状烷可以通过添加阴离子后各自轮状烷的二茂铁-二茂铁还原氧化偶对的阴极扰动来感应氯化物。