Takaishi Kazuto, Takehana Ryosuke, Ema Tadashi
Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama, Japan.
Chem Commun (Camb). 2018 Feb 6;54(12):1449-1452. doi: 10.1039/c7cc09187g.
(R,R,R)-Quaternaphthyls possessing eight and six pyrenes (compounds 4 and 3) displayed intense excimer-CPL. The g values in solution and in the solid state were +0.034-0.037 and +0.0053-0.0056, respectively. The g values of 3 and 4 were indistinguishable, indicating that the pyrenes of 3 and 4 assumed the same conformation, even in excited states. The intense CPL was caused by conformationally rigid pyrenes arranged via the cumulative steric effects along the quaternaphthyl axis.
含有八个和六个芘的（R，R，R）-四萘基化合物（化合物4和3）表现出强烈的激基缔合物圆偏振发光。溶液中和固态下的g值分别为+0.034 - 0.037和+0.0053 - 0.0056。3和4的g值无法区分，这表明3和4中的芘即使在激发态下也具有相同的构象。强烈的圆偏振发光是由沿四萘基轴通过累积空间效应排列的构象刚性芘引起的。
