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Hierarchical Assembly of Organic/Inorganic Building Molecules with π-π Interactions

机译:具有π-π相互作用的有机/无机建筑分子的层次组装

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Hierarchical assemblies of perylenetetracarboxylic diimide bridged silsesquioxane (PDBS) with controlled structure at multi-length scale are studied using both experimental and computational methods. The organization process spans multi-length scales and includes three continuous steps: 1) stacking of the preprogrammed molecules into small clusters, 2) growing of the small clusters into nanoscale building blocks with various sizes and shapes depending on the experimental conditions, and 3) aggregation of nanoscale building blocks into micro- or macro-scale assemblies. The main factors determining the assembly morphology are the second and third steps, which can be controlled by varying the experimental conditions, such as solution drying rate, solvent composition, and PDBS concentration. Despite the different morphologies, all of these assemblies possess highly ordered lamellar structure. It is found that incorporating perylenetetracarboxylic diimide (PD) moieties into the highly ordered silica network endows the PD components with high thermal and mechanical stability, as well as improved optical and electronic properties.
机译:利用实验和计算方法研究了多长度尺度上具有可控结构的per四羧酸二酰亚胺桥联倍半硅氧烷(PDBS)的分层组装。组织过程跨越多个长度尺度,包括三个连续步骤:1)将预编程的分子堆叠为小簇; 2)根据实验条件,将小簇生长为具有各种大小和形状的纳米级构造块,以及3)将纳米级构建块聚合为微观或宏观组装。决定组装形态的主要因素是第二步和第三步,可以通过改变实验条件(例如溶液干燥速率,溶剂组成和PDBS浓度)来控制。尽管形态不同,但所有这些组件都具有高度有序的层状结构。发现将per四羧酸二酰亚胺(PD)部分掺入高度有序的二氧化硅网络中赋予PD组分高的热和机械稳定性,以及改善的光学和电子性能。

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