A strongly anisotropic architecture of stacked metal–organic grids, with pores arranged through their eyes, has been revealed for the new coordination polymer Ni(bipy)(hip)(H₂O)₂·DMF·CH₃OH·H₂O, where bipy is 4,4′-bipyridine and hip is 5-hydroxyisophthalic acid. This porous crystal, when submerged in various nonpenetrating oils used as the hydrostatic media, displays a negative volume compressibility. This counterintuitive effect results in the zone amorphization injecting the contents of collapsing pores into the retained crystalline portions of the sample. This additional contents of the pores supports the crystalline parts and prevents their amorphization.

中文翻译：

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模拟多孔化合物负压缩性的区域折叠非晶化

对于新型配位聚合物Ni（bipy）（hip）（H ₂ O）₂ ·DMF·CH ₃ OH·H ₂ O，已经揭示了由金属-有机网格堆叠而成的强各向异性结构，其孔眼排列。其中bipy是4,4'-联吡啶，臀部是5-羟基间苯二甲酸。当浸入用作流体静压介质的各种非渗透性油中时，该多孔晶体显示出负的体积可压缩性。这种反直觉的效果导致区域非晶化，将塌陷孔的内容物注入样品的保留晶体部分。孔的这种额外含量支持结晶部分并防止其非晶化。