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首页> 外文期刊>Crystal growth & design >Synthesis and structures of two novel three-dimensional metal-organic frameworks: Comprising an unprecedented tetraflexure helix
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Synthesis and structures of two novel three-dimensional metal-organic frameworks: Comprising an unprecedented tetraflexure helix

机译：两种新颖的三维金属有机骨架的合成和结构：包含空前的四挠性螺旋

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摘要

Two isomorphous three-dimensional metal-organic frameworks, [M(dtb)(4,4′-bipyridine)_(1.5)(H_2O)]_n (1, M = Ni; 2, M = Co) [dtb = 5,5′-dithiobis(2-nitrobenzoic acid), 4,4′-bipy = 4,4′-bipyridine], have been synthesized by ligating metal ions with V-shaped H_2dtb and linear 4,4′-bipy ligands, and they have been characterized structurally by single crystal X-ray diffraction studies and FT-IR and TGA analysis. Complexes 1 and 2 exhibit fascinating interweaved meso-helices and represent the first examples of metal-organic frameworks with four spiral shafts in one helical chain, named a tetraflexural helix. The pitch of the single helical chain is up to 27.741 ?, which is out of the normal scope of helical pitch.
机译：两个同构的三维金属有机骨架，[M（dtb）（4,4'-联吡啶）_（1.5）（H_2O）] _ n（1，M = Ni; 2，M = Co）[dtb = 5，通过将金属离子与V型H_2dtb和线性4,4'-bipy配体连接，合成了5'-二硫代双（2-硝基苯甲酸），4,4'-bipy = 4,4'-bipyridine]，通过单晶X射线衍射研究以及FT-IR和TGA分析在结构上进行了表征。配合物1和2表现出令人着迷的交织中观螺旋，并代表了金属有机骨架的第一个实例，在一个螺旋链中具有四个螺旋轴，称为四挠性螺旋。单螺旋链的节距最大为27.741？，超出了正常的螺旋节距范围。

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