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Anion and Cation Effects on Anion-Templated Assembly of Tetrahydroxytriptycene

机译:阴离子和阳离子对四羟基三茂萜阴离子模板组装的影响

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摘要

A tetrahydroxytriptycene ligand 1 assembles through O-H center dot center dot center dot anion hydrogen bonds into a range of different structures. With tetrabutylammonium bromide, 1 forms a stable nanotube structure that is supported by O-H center dot center dot center dot anion hydrogen bonds, but its space is occupied by the large cation. In an effort to produce the nanotubes with different cations and anions, 1 was crystallized with different salts. The reaction of 1 with tetraethylammonium bromide gives a 2D net structure, while 1 and tetrapropylammonium bromide give a discrete 1:2 complex. Attempting to co-crystallize 1 and tetramethylammonium bromide gave crystals of an oxidized quinone form of the ligand. When 1 was crystallized with tetrabutylammonium terephthalate, two different one-dimensional anion coordination polymers were obtained, depending on the crystallization solvent: acetonitrile gave a zigzag polymer, while methanol gave a linear structure. In both cases, the tetrabutylammonium cations fill the gaps between the ID polymers, giving a layered 2D morphology. The wide range of architectures prepared from a relatively simple ligand illustrates the potential utility of O-H center dot center dot center dot anion interactions for constructing solid-state materials.
机译:四羟基三茂金属配体1通过O-H中心点中心点中心点中心阴离子氢键组装成一系列不同的结构。与四丁基溴化铵一起形成稳定的纳米管结构,该结构由O-H中心点中心点中心点中心阴离子氢键支撑,但其空间被大阳离子占据。为了生产具有不同阳离子和阴离子的纳米管,将1用不同的盐结晶。 1与四乙基溴化铵的反应生成2D网络结构,而1与四丙基溴化铵的生成离散的1:2络合物。尝试使1和四甲基溴化铵共结晶,得到配体的氧化醌形式的晶体。当1用对苯二甲酸四丁铵结晶后,得到两种不同的一维阴离子配位聚合物,具体取决于结晶溶剂:乙腈给出了一种曲折形的聚合物,而甲醇给出了线性的结构。在这两种情况下,四丁基铵阳离子都填充了ID聚合物之间的间隙,从而形成了分层的2D形态。由相对简单的配体制备的各种体系结构说明了O-H中心点中心点中心点阴离子相互作用对构建固态材料的潜在实用性。

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