Ikeshita Masahiro, Shimizu Itsuki, Watanabe Shinya, Yamada Tomoki, Suzuki Seika, Tanaka Shota, Hattori Shingo, Shinozaki Kazuteru, Imai Yoshitane, Tsuno Takashi
Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba 275-8575, Japan.
Graduate School of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
Inorg Chem. 2024 Dec 16;63(50):23642-23650. doi: 10.1021/acs.inorgchem.4c03675. Epub 2024 Nov 27.
The synthesis, structure, and circularly polarized phosphorescence (CPP) properties of axially chiral cyclometalated binuclear platinum(II) complexes were described. A series of optically pure binuclear platinum(II) complexes were synthesized in five steps from commercially available ()- or ()-1,1'-bi-2-naphthol (BINOL) as starting materials. Their three-dimensional molecular structures and square-planar coordination geometries were elucidated from X-ray diffraction and 2D NMR analysis. The complexes were found to exhibit red- to near-infrared photoluminescence in solution and in the solid state. Furthermore, dilute DMSO solutions of the enantiopure samples showed red CPP with relatively high luminescence dissymmetry factor () values. Density functional theory (DFT) calculations were conducted to examine their three-dimensional molecular conformations and photophysical properties.
描述了轴向手性环金属化双核铂（II）配合物的合成、结构和圆偏振磷光（CPP）性质。以市售的（）-或（）-1,1'-联二萘酚（BINOL）为起始原料，分五步合成了一系列光学纯的双核铂（II）配合物。通过X射线衍射和二维核磁共振分析阐明了它们的三维分子结构和平面正方形配位几何结构。发现这些配合物在溶液和固态中均表现出从红色到近红外的光致发光。此外，对映体纯样品的稀二甲基亚砜溶液显示出具有相对较高发光不对称因子（）值的红色CPP。进行了密度泛函理论（DFT）计算以研究它们的三维分子构象和光物理性质。
