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首页> 外文期刊>Crystal growth & design >Halogen bonding motifs in polyhedral phenylsilsesquioxanes: Effects of systematic variations in geometry or substitution
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Halogen bonding motifs in polyhedral phenylsilsesquioxanes: Effects of systematic variations in geometry or substitution

机译:多面体苯基倍半硅氧烷中的卤素键基序:几何形状或取代度的系统变化的影响

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摘要

Herein we describe the halogen bonding coordination found in the crystal structures of two homologous series of hybrid silsesquioxane (Polyhedral Oligomeric SilsesquioxaneS, or POSS) molecules, with systematic variations in halogen substitution and cluster geometry. Each of these compounds presents highly coordinated three-dimensional motifs. The first examples are a series of three para-iodinated octa-, deca-, and dodecameric phenylsilsesquioxanes, which show a range of symmetry dependent coordination motifs. The second set of examples deal with the structures of the octa-, hexadeca-, and tetraicosa-brominated octaphenylsilsesquioxane, where again significant short contacts are found, which drive the formation different cluster packing motifs. These structures provide unique examples of the complexities of three-dimensional packing motifs and their relationship to the assembly of tunable materials from nanobuilding blocks.
机译:在本文中,我们描述了在两个相同系列的杂硅倍半氧烷(多面体寡聚倍半硅氧烷,或POSS)分子的晶体结构中发现的卤素键配位,其中卤素取代和簇的几何结构存在系统性变化。这些化合物中的每一个都具有高度协调的三维图案。第一个例子是一系列三个对位碘代的八,十和十二聚苯基倍半硅氧烷,它们显示出一系列依赖于对称性的配位基序。第二组示例涉及八-,十六-和四二十溴代的八苯基倍半硅氧烷的结构,在该结构中又发现了明显的短接点,这些短接点促使形成不同的簇堆积图案。这些结构提供了三维包装图案的复杂性及其与从纳米建筑块组装可调材料的关系的独特示例。

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