Lim Jason Y C, Cunningham Matthew J, Davis Jason J, Beer Paul D
Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
Dalton Trans. 2014 Dec 14;43(46):17274-82. doi: 10.1039/c4dt02591a.
The first examples of redox-active ferrocene-functionalised neutral [2]rotaxanes have been synthesised via chloride anion templation. (1)H 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 hydrogen bonding prototriazole units of the rotaxane axle component with iodotriazole halogen bond-donor groups, the degree of chloride selectivity of the [2]rotaxanes is modulated. Electrochemical voltammetric experiments demonstrate that the rotaxanes can sense chloride via cathodic perturbations of the respective rotaxanes' ferrocene-ferrocenium redox-couple upon anion addition.
通过氯离子模板法合成了首例具有氧化还原活性的二茂铁官能化中性[2]轮烷。核磁共振氢谱滴定表明，在竞争激烈的水性介质中，这些[2]轮烷主体体系对氯离子的选择性高于其他卤化物和含氧阴离子。通过用碘代三唑卤素键供体基团取代轮烷轴组件中的氢键质子三唑单元，可调节[2]轮烷对氯离子的选择性程度。电化学伏安实验表明，加入阴离子后，轮烷可通过各自二茂铁-二茂铁鎓氧化还原对的阴极扰动来感应氯离子。
