By attaching pyridine groups to a diaza[6]helicene, a helical, bis‐ditopic, bis‐N N‐coordinating ligand can be accessed. Dinuclear rhenium complexes featuring this bridging ligand, of the form [{Re(CO)₃Cl}₂(N N−N N)], have been prepared and resolved to give enantiopure complexes. These complexes are phosphorescent in solution at room temperature under one‐ and two‐photon excitation. Their experimental chiroptical properties (optical rotation, electronic circular dichroism and circularly polarized emission) have been measured. They show, for instance, emission dissymmetry factors of c.a. ±3x10⁻³. Quantum‐chemical calculations indicate the importance of stereochemistry on the optical activity, pointing towards further design improvements in such types of complexes.

中文翻译：

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具有桥接螺旋-双-联吡啶配体的双核铼配合物：合成、结构以及光物理和手性光学特性。

通过将吡啶基团连接到二氮杂 [6] 螺旋烯上，可以获得螺旋、双双位、双N  N配位配体。以这种桥接配体为特征的双核铼配合物，形式为 [{Re(CO) ₃ Cl} ₂ ( N  N - N  N )]，已被制备并解析为对映纯配合物。这些配合物在室温下在单光子和双光子激发下在溶液中发磷光。已经测量了它们的实验手性光学特性（旋光、电子圆二色性和圆偏振发射）。例如，它们显示了约 ±3x10 ^{-3 的}排放不对称因子. 量子化学计算表明立体化学对光学活性的重要性，并指出此类配合物的进一步设计改进。