Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan.
Diffraction and Scattering Division, Japan Synchrotron Radiation Research Institute, Sayo, 679-5198, Japan.
Chemistry. 2021 Jul 12;27(39):10068-10076. doi: 10.1002/chem.202100855. Epub 2021 Jun 4.
A variety of π-electronic ion-pairing assemblies can be constructed by combining anion complexes of π-electronic systems and countercations. In this study, a series of anion-responsive π-electronic molecules, dipyrrolyldiketone Pt complexes containing a phenylpyridine ligand, were synthesized. The resulting Pt complexes exhibited phosphorescence emission, with higher emission quantum yields (0.30-0.42) and microsecond-order lifetimes, and solution-state anion binding, as revealed by our spectroscopic analyses. These Pt complexes displayed solid-state ion-pairing assemblies, exhibiting various anion-binding modes, which derived from pyrrole-inverted and pyrrole-non-inverted conformations, and packing structures, with the contribution of charge-by-charge assemblies, which were dependent on the substituents in the Pt complexes and the geometries and electronic states of their countercations.
通过将π-电子体系的阴离子配合物与抗衡阳离子相结合，可以构建各种π-电子离聚体。在本研究中，合成了一系列阴离子响应性π-电子分子，即含有苯吡啶配体的二吡咯二酮 Pt 配合物。我们的光谱分析表明，所得的 Pt 配合物具有磷光发射，其荧光量子产率（0.30-0.42）较高，寿命为微秒级，且在溶液状态下能与阴离子结合。这些 Pt 配合物形成了固态的离聚体组装体，表现出各种阴离子结合模式，这些模式源于吡咯翻转和吡咯非翻转构象以及堆积结构，且其结构受 Pt 配合物中的取代基以及抗衡阳离子的几何形状和电子态的影响。
