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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >A Distorted pcu Topological Heterometallic Metal-Organic Framework with Right- and Left Chiral Covalent Layers
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A Distorted pcu Topological Heterometallic Metal-Organic Framework with Right- and Left Chiral Covalent Layers

机译:具有左右手性共价层的扭曲pcu拓扑异金属金属有机框架

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摘要

An unusual heterometallic 3D framework, [Zn_2Ca(mip)_2(Hmip)_2(bpe)]_n (1), was synthesized by using an alkaliearth metal (calcium) and a d~(10) metal (zinc) under hydrothermal conditions [H_2mip = 5-methylisophthalic acid, bpe = 1,2-bi(4-pyridyl)ethene]. Single-crystal X-ray analysis shows that complex 1 is a pillaredgrid metal-organic framework (MOF) with nanosized parallelogram channels fully occupied by dangling Hmip- pendants. The most fascinating structural feature of the complex is that the achiral framework pillared by rod-like bpe is assembled by opposite chiral covalent sheets arranged alternatingly with single left- or right-handed helical chains. Topologically, the framework can be simplified as a distorted uninodal pcu net with the Schl?fli symbol of {4~(12)·6~3}, which is rare representative of an achiral pillared-layer MOF with chiral sheets comprising only one type of helical chains.
机译:在水热条件下,通过使用碱土金属(钙)和ad〜(10)金属(锌)合成了一种不寻常的异质3D框架[Zn_2Ca(mip)_2(Hmip)_2(bpe)] _ n(1)。 = 5-甲基间苯二甲酸,bpe = 1,2-双(4-吡啶基)乙烯]。单晶X射线分析表明,复合物1是具有金属网格的有机金属骨架(MOF),其纳米尺寸的平行四边形通道完全由悬垂的Hmip-侧链占据。该复合物最引人入胜的结构特征是,由棒状bpe柱撑的非手性骨架是由相对的手性共价片组装而成的,这些手性共价片交替排列着左旋或右旋螺旋链。在拓扑上,可以将框架简化为带有Schl?fli符号{4〜(12)·6〜3}的扭曲的单齿pcu网,这很少代表具有手性片仅包含一种类型的非手性柱状层MOF螺旋链。

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