Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Strasbourg University, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France.
Department of Chemistry, College of Arts and Sciences, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates.
Molecules. 2023 Feb 21;28(5):2038. doi: 10.3390/molecules28052038.
We show that through the introduction of short dimethylsiloxane chains, it was possible to suppress the crystalline state of CBP in favor of various types of organization, transitioning from a soft crystal to a fluid liquid crystal mesophase, then to a liquid state. Characterized by X-ray scattering, all organizations reveal a similar layered configuration in which layers of edge-on lying CBP cores alternate with siloxane. The difference between all CBP organizations essentially lay on the regularity of the molecular packing that modulates the interactions of neighboring conjugated cores. As a result, the materials show quite different thin film absorption and emission properties, which could be correlated to the features of the chemical architectures and the molecular organizations.
我们表明，通过引入短的二甲基硅氧烷链，可以抑制 CBP 的晶态，有利于各种类型的组织，从软晶体转变为流体向列液晶中间相，然后转变为液体。通过 X 射线散射来表征，所有的组织都揭示了一种类似的层状结构，其中边缘朝上的 CBP 核的层与硅氧烷交替。所有 CBP 组织的区别主要在于分子堆积的规律性，这调节了相邻共轭核的相互作用。因此，这些材料表现出截然不同的薄膜吸收和发射特性，这可以与化学结构和分子组织的特征相关联。
