Two one-dimensional (1D) helical coordination polymers, CuBIm–Cl and CuBIm–Br (BIm = 1,2-bis((5H-imidazol-4-yl)-methylene)hydrazine), are constructed from Cu²⁺ ions, halides and mono-deprotonated BIm. Solid-state crystalline conversions of CuBIm–Cl and CuBIm–Br to a gyroidal metal–organic framework (MOF) STU-3 which is composed of Cu ions and Bim ligands are observed through a gas–solid reaction, where the gas is methylamine.

中文翻译：

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从螺旋孔到螺旋孔：气固反应触发的固态晶体转化

由Cu ²⁺离子构成两个一维（1D）螺旋配位聚合物CuBIm–Cl和CuBIm–Br（BIm = 1,2-bis（（5 H-咪唑-4-基）-亚甲基）肼），卤化物和单去质子化的BIm。通过气固反应观察到CuBIm–Cl和CuBIm–Br固态结晶转化为由铜离子和Bim配体组成的螺旋形金属有机骨架（MOF）STU-3，其中气体为甲胺。