A homoleptic zinc(II) helicate organized by a pair of achiral dipyrromethene ligands through zinc(II) coordination was synthesized to evaluate the chiroptical properties. This zinc complex showed strong exciton‐coupled chiroptical responses from the helical configuration with a large absorption dissymmetry factor |g_abs| (up to 0.20). More importantly, intense polarized luminescence in the far‐red region (700–850 nm) with a fluorescence quantum yield Φ_FL of 0.23 was observed for this helicate with a dissymmetry factor |g_lum| of 0.022, the largest value among rare‐earth‐ and precious‐metal‐free small molecules. These unprecedentedly large g values were supported by theoretical calculations.

中文翻译：

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远红区中吸收和发光不对称因素的显着增强：由一对非手性二吡咯亚甲基配体形成的锌（II）同源性螺旋

合成了由一对非手性二吡咯亚甲基配体通过锌（II）配位组织的均化锌（II）螺旋结构，以评估手性。这种锌络合物显示出强烈的激子耦合的螺旋响应，其螺旋构型具有较大的吸收不对称因子。g _abs | （最大为0.20）。更重要的是，在远红外区域（700-850纳米）与荧光量子产率强烈偏振发光Φ _FL观察到这个helicate与不对称因子0.23 | 摹_LUM | 值为0.022，这是不含稀土和贵金属的小分子中的最大值。这些空前大的g值得到了理论计算的支持。