Two axially chiral BODIPY-binaphthalene dyads, (R)-/(S)-BDP1-2, were synthesized by tethering BODIPY to the 3- or 3,3′-position of chiral binaphthalene. (R)-/(S)-BDP1 show a very weak Cotton effect and circularly polarized luminescence (CPL), demonstrating the inefficient perturbation effect of binaphthalene on BODIPY in both ground and excited state. In contrast, (R)-/(S)-BDP2 show an intense Cotton effect and CPL. According to the theoretical results, this difference should be originated from the energy transfer between the two BODIPY units in (R)-/(S)-BDP2.

中文翻译：

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轴向手性双萘桥联BODIPY的圆偏振发光

通过将BODIPY束缚在手性双萘的3或3,3'-位上，合成了两个轴向手性BODIPY-双萘二元体（R）-/（S）-BDP1-2。（R）-/（S）-BDP1表现出很弱的棉花效应和圆偏振发光（CPL），证明了在基态和激发态下双萘对BODIPY的微扰效应均不足。相反，（R）-/（S）-BDP2显示出强烈的棉花效应和CPL。根据理论结果，此差异应源于（R）-/（S）-中两个BODIPY单元之间的能量转移BDP2。