Abstract：
We describe the synthesis of π-extended phosphetene rings (4-member P-rings) flanked with PAH systems of various topologies. These compounds are fully characterized including X-ray diffraction. The impact of both the polyaromatic platform and the P-ring on the structure, and the optical and redox properties are investigated both experimentally and theoretically. Although neither the P centre nor the 4-membered ring significantly takes part in the HOMO or LUMO orbitals, both structural features have an important modulating role in distorting the symmetry of the orbitals, leading to chiroptical properties. The stereogenic P-atom is used as a remote chiral perturbator to induce circularly polarized luminescence of the polyaromatic system. The dissymmetry factor is highly dependent on the polyaromatic topology, as supported by theoretical calculations.
摘要：
我们描述了与各种拓扑的PAH系统相连的π扩展的膦环（4元P环）的合成。这些化合物被充分表征,包括X-射线衍射。聚芳族平台和P环对结构的影响，光学和氧化还原性质进行了实验和理论研究。尽管P中心和4元环都不参与HOMO或LUMO轨道，这两个结构特征在扭曲轨道对称性方面都有重要的调节作用，导致手性属性。立体异构P原子用作远程手性微扰器，以诱导聚芳族体系的圆偏振发光。不对称因素高度依赖于多芳族拓扑，如理论计算所支持。
