Wang Lin, Hao Aiyou, Xing Pengyao
School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.
ACS Appl Mater Interfaces. 2022 Oct 5;14(39):44902-44908. doi: 10.1021/acsami.2c15187. Epub 2022 Sep 22.
Solid-state host-guest complexation shows great potential in the fabrication of chiroptical and phosphorescent materials. Developing chiral hosts toward achiral guests with a wide guest scope would expand the chiroptical application, which however remains a major challenge. Here, we report the steroid-aromatic compound complexation in the solid state that could realize effective chirality transfer, circularly polarized luminescence, and room temperature phosphorescence (RTP). Progesterone shows cocrystallization behavior toward a wide scope of guests through CH-π interaction, which also offers a rigid yet chiral microenvironment to entrap aromatic luminophores within the cavities or channels. Depending on the geometry of the guests, the handedness of the Cotton effects and circularly polarized luminescence could be tuned. Host-guest complexation not only gave rise to Cotton effects and circularly polarized luminescence but also stabilized the triplet state of bromo-compounds to achieve RTP and circularly polarized phosphorescence. This work first illustrates the application of steroid complexation in the chiroptical and phosphorescent materials, which shows potential in the display and information aspects.
固态主客体络合在制备手性光学和磷光材料方面显示出巨大潜力。开发能够与多种非手性客体形成络合物的手性主体，将拓宽手性光学应用范围，然而这仍然是一个重大挑战。在此，我们报道了固态下甾体与芳香族化合物的络合，该络合能够实现有效的手性转移、圆偏振发光和室温磷光（RTP）。孕酮通过CH-π相互作用对多种客体表现出共结晶行为，这也提供了一个刚性的手性微环境，将芳香族发光体捕获在空腔或通道内。根据客体的几何形状，可以调节科顿效应和圆偏振发光的旋光性。主客体络合不仅产生了科顿效应和圆偏振发光，还稳定了溴代化合物的三重态以实现RTP和圆偏振磷光。这项工作首次展示了甾体络合在制备手性光学和磷光材料中的应用，在显示和信息方面具有潜力。
