作者:Matthew J. Langton、Paul D. Beer
DOI:10.1002/chem.201202204
日期:2012.11.5
The chloride‐templated synthesis of a novel [3]rotaxane, capable of binding anionic guests, and incorporating a naphthalene group for fluorescence sensing is reported. Extensive 1H NMR titration studies were used to probe the anion binding selectivity of the system. The rotaxane selectively recognises sulfate, undergoing an induced conformational change upon sulfate binding to form a 1:1 stoichiometric
报道了一种新型的[3]轮烷的氯化物为模板的合成,它能够结合阴离子客体,并引入用于荧光传感的萘基。广泛的1 H NMR滴定研究用于探测系统的阴离子结合选择性。轮烷选择性地识别硫酸盐,在硫酸盐结合后发生诱导的构象变化,形成1:1的化学计量夹心型复合物,并伴随荧光的显着猝灭。单阴离子客体的结合会导致化学计量的客体与主体的化学计量比为2:1,并适度地提高了排放。在非竞争性溶剂中添加过量的硫酸盐也会导致2:1的发射复合物。