College of Chemistry, Sichuan University, Chengdu, 610041, China.
Dalton Trans. 2019 Mar 26;48(13):4420-4428. doi: 10.1039/c8dt03615b.
A series of binuclear cyclometalated Pt(ii) complexes with the bridge ligand of binaphthyl quinoline were synthesized and characterized. Owing to the restriction of intramolecular motions in chiral binaphthyl linkers, the complexes exhibited two unusual metal-induced chiral components and aggregation-induced red phosphorescence. The (R,R,R)/(S,S,S) enantiopure complexes that were confirmed by X-ray diffraction, circular dichroism spectra, time-dependent density functional theory calculations, and circularly polarized luminescence did not require purification by chiral high-performance liquid chromatography and could yield unique 1D M or P hierarchical helices of helices via intermolecular noncovalent interactions. Moreover, it is the first time that racemization-induced phosphorescence enhancement has been observed.
一系列具有联萘基喹啉桥联配体的双核金属铂配合物被合成并进行了表征。由于手性联萘基连接体的分子内运动的限制，这些配合物表现出两种不寻常的金属诱导手性组分和聚集诱导的红色磷光。通过 X 射线衍射、圆二色光谱、含时密度泛函理论计算和圆偏振发光证实的（R,R,R）/（S,S,S）对映纯配合物不需要通过手性高效液相色谱进行纯化，并且可以通过分子间非共价相互作用生成独特的 1D M 或 P 分级螺旋。此外，这是首次观察到外消旋诱导磷光增强。
