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首页> 外文期刊>Crystal growth & design >Enhancing Single-Crystal Dichroism of an Asymmetric Azo Chromophore by Perfluorophenyl Embraces and Boron Coordination
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Enhancing Single-Crystal Dichroism of an Asymmetric Azo Chromophore by Perfluorophenyl Embraces and Boron Coordination

机译：通过全氟苯基和硼协调增强非对称偶氮发色团的单晶二分曲张

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摘要

We describe the use of perfluorophenyl embraces and boron coordination (B <- N) to enhance dichroism in single crystals of an asymmetric azo chromophore. Specifically, a tripod-shaped boron adduct comprised of tris(pentafluorophenyl)borane (BCF) and 4-phenylazopyridine (4PAzP) self-assembles as supramolecular helices through perfluorophenyl embraces, wherein the azo chromophores are aligned in parallel through B <- N bonds. The alignment of molecular transition dipole moments in (BCF)center dot(4PAzP) results in enhanced dichroism compared to pure 4PAzP as confirmed by polarized optical microscopy. The study offers a novel supramolecular strategy to enhance dichroism in single-crystalline materials.
机译：我们描述了使用全氟苯基环和硼配位（B<-N）来增强不对称偶氮生色团单晶中的二向色性。具体而言，由三（五氟苯基）硼烷（BCF）和4-苯基偶氮吡啶（4PAzP）组成的三脚架形硼加合物通过全氟苯基环抱物自组装为超分子螺旋，其中偶氮生色团通过B<-N键平行排列。偏光显微镜证实，与纯4PAzP相比，（BCF）中心点（4PAzP）中分子跃迁偶极矩的排列导致二向色性增强。这项研究为增强单晶材料的二向色性提供了一种新的超分子策略。

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