基于四齿共轭联萘-Salen配体的手性螺旋结构的近红外圆偏振和聚集诱导的Pt（II）磷光配合物

Unusual Circularly Polarized and Aggregation-Induced Near-Infrared Phosphorescence of  Helical Platinum(II) Complexes with Tetradentate Salen Ligands

Jintong Song, Man Wang, Xiangge Zhou, and Haifeng Xiang*      

Chemistry - A European Journal，Chem. Eur. J.，2018, 24,7128 –7132，doi.org/10.1002/chem.201801414 

A series of chiral and helical Pt(II)-Salen complexes with 1,1’-binaphthyls linker were synthesized and characterized. Owing to the restriction of intramolecular motions of central 1,1’-binaphthyls, the complexes exhibit unusual near-infrared aggregation-induced phosphorescence (AIP). The (R)/(S) enantiopure complexes were characterized by X-ray diffraction, circular dichroism spectra, time-dependent density functional theory calculations and circularly polarized luminescence (CPL). The present work explores the use of tetradentate ligands that can be easily prepared from commercially available enantiopure compounds and the subsequent preparation of stable CPL-active square planar Pt(II) complexes with AIP effect that may have interest in many applications.