Circularly Polarized Luminescence Liquids Based on Siloxybinaphthyls: Best Binaphthyl Dihedral Angle in the Excited State
作者:Kazuto Takaishi、Tomoki Matsumoto、Miyu Kawataka、Tadashi Ema
DOI:10.1002/anie.202101226
日期:2021.4.26
compounds remained liquid over a broad range of temperatures, down to −50 °C. Time‐dependent DFT calculations indicated that in the excited state, the binaphthyls adopt a transoid conformation with a small angle between the electric and magnetic transition dipole moments (θμ,m=77°), which is a key factor in their CPL activity. The best binaphthyl dihedral angle in the excited state is approximately 110°
合成了一系列带有三烷基甲硅烷氧基(OSiR 3)的轴向手性1,1'-联萘基。其中,在7,7'-位具有OSiR 3基团且在2,2'-位具有甲基的1 a – c在室温下为液体,纯净的液体显示出圆偏振发光(CPL)(R =卜; Φ FL,液体= 0.21,|克LUM,液体| = 1.6×10 -3)。的| 克液体, | 价值是纯液体的最高值。这些化合物在低至−50°C的较宽温度范围内仍保持液态。随时间变化的DFT计算表明,在激发态下,双萘基采用transoid构象与电和磁跃迁偶极矩之间的小角度(θ μ,米= 77°),这是在它们的CPL活性的关键因素。处于激发态的最佳联萘二面角约为110°。