The multifunctional mechanical property, negative linear compressibility (NLC), could arise in the crystals consisting of wine-racklike networks. A typical wine-racklike unit usually expands along its longer diagonal and shrinks along its shorter diagonal under compression. The previous researches concentrated just on materials with homogeneous wine-rack motif in their structures. Herein, we report a novel NLC behavior with a large value of −47.3 TPa^–1 in metal-organic frameworks, MCF-34, whose crystal structure consists of four kinds of orientations of wine-rack units shaped in two types. The NLC behavior of MCF-34 arises in a vector direction composed of all the longer diagonals from the four different oriented wine-rack units. This discovery helps us comprehend the mechanical response of a single material with multitype wine-rack units under high pressure. This work is of great guiding significance to design and synthesize customized materials with excellent mechanical properties.

中文翻译：

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多种酒架金属有机框架中压力的负线性可压缩性响应

多功能机械性能，负线性可压缩性（NLC），可能出现在由酒架状网络组成的晶体中。典型的酒架状单元通常在压缩下沿其较长的对角线扩展，并沿其较短的对角线收缩。先前的研究仅集中于结构上均具有酒架图案的材料。在这里，我们报告了一种新颖的NLC行为，其值为-47.3 TPa ^–1在金属有机框架中，MCF-34的晶体结构由两种类型的酒架单元的四种取向组成。MCF-34的NLC行为沿矢量方向出现，该方向由来自四个不同方向的酒架单元的所有较长对角线组成。这一发现有助于我们理解带有多种类型酒架单元的单一材料在高压下的机械响应。这项工作对于设计和合成具有优异机械性能的定制材料具有重要的指导意义。