Intuition indicates that materials will contract in all crystal directions under hydrostatic pressure, i.e., all of their axes exhibit positive linear compressibility (PLC) when uniformly compressed. However, some exceptions have been found to exhibit negative linear compressibility (NLC), negative area compressibility (NAC), zero linear compressibility (ZLC), or zero area compressibility (ZAC); these materials are thought to have promising applications under high-pressure conditions, such as would be needed for highly sensitive pressure detectors and deep-sea optical devices. In this Perspective, we summarize the four kinds of abnormal compressive behaviors of MOFs under hydrostatic pressure, including the mechanisms and effects of guest, PTM, and metal atomic radius, which we hope to be helpful to develop practical future application of abnormal compressive materials.

中文翻译：

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静水压力下金属有机骨架的异常压缩行为

直觉表明，材料在静水压力下会在所有晶​​体方向上收缩，即当均匀压缩时，它们的所有轴都表现出正线性压缩率（PLC）。然而，已经发现一些例外表现出负线性可压缩性 (NLC)、负面积可压缩性 (NAC)、零线性可压缩性 (ZLC) 或零面积可压缩性 (ZAC)；这些材料被认为在高压条件下具有广阔的应用前景，例如用于高灵敏度压力探测器和深海光学设备。在这个观点中，我们总结了 MOFs 在静水压力下的四种异常压缩行为，包括客体、PTM 和金属原子半径的机制和影响，