Circularly polarized luminescence (CPL) induced by host–guest complexation remains a challenge in supramolecular chemistry. Herein, a couple of CPL–silent enantiomeric guest binaphthylbis(4,4′‐bipyridinium) salts can emit obvious CPL in the presence of cucurbit[8]uril in aqueous media, due to the restriction of molecular rotation limitation effect. Such CPL can be reversibly adjusted by the addition of acid and base. Furthermore, the resultant supramolecular systems can interact with DNA, accompanied by the morphological conversion from branched supramolecular nanowires to exfoliated nanowires, which can enable to the exploration of such supramolecular systems as DNA markers by CPL signals.

中文翻译：

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手性双萘甲双（4,4'-联吡啶-1-Ium）/葫芦[8] Uril超分子系统及其诱导的圆偏振发光

主客体复合物诱导的圆偏振发光（CPL）在超分子化学中仍然是一个挑战。这里，由于分子旋转限制作用的限制，在水介质中葫芦[8]尿嘧啶存在下，一对CPL-沉默的对映体客体双萘基双（4,4'-联吡啶鎓）盐可以释放出明显的CPL。可以通过添加酸和碱来可逆地调节这种CPL。此外，所得的超分子系统可以与DNA相互作用，伴随着从支化的超分子纳米线到脱落的纳米线的形态转化，这可以通过CPL信号探索诸如DNA标记的超分子系统。