The construction of superstable metal–organic frameworks (MOFs) for selective gas uptake is urgently demanded but remains a great challenge. Herein, a unique bifunctional deformed [Ga₃O(COO)₆] inorganic secondary building unit (SBU) generated from the desymmetrical evolution of typical triangular prismatic trinuclear cluster was first introduced, which was extended by an isosceles triangular organic linker to produce a robust Ga-MOF (SNNU-63). Remarkably, SNNU-63 can stabilize in water at 25 °C for 96 h and at 80 °C for more than 24 h, which surpasses nearly all other Ga-MOFs. The combined effects of open metal sites and hydrophobic pore environment provided by deformed [Ga₃O] SBUs render SNNU-63 with high C₂H₂ storage capacity and efficient C₂H₂ and natural gas purification performance. The ideal adsorbed solution theory calculation, column breakthrough tests, and grand canonical Monte Carlo simulations demonstrate that SNNU-63 is a potential material for addressing the challenge of C₂H₂/CO₂ and C₂H₂/CH₄ mixture separation under ambient conditions.

中文翻译：

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通过变形的[Ga3O（COO）6]簇定制鲁棒Ga-MOF的孔环境，以促进C2H2的吸收和分离。

迫切需要构建用于选择性气体吸收的超稳定金属有机框架（MOF），但仍然是一个巨大的挑战。本文中，首先介绍了由典型的三角棱柱形三核团簇的不对称演化产生的独特的双功能变形[Ga ₃ O（COO）₆ ]无机二级建筑单元（SBU），并通过等腰三角形有机连接基进行了扩展以产生坚固的结构Ga-MOF（SNNU-63）。值得注意的是，SNNU-63可以在25°C的水中稳定96小时，在80°C的水中稳定24小时以上，几乎超过所有其他Ga-MOF。变形的[Ga ₃ O] SBU提供的开放金属位点和疏水性孔隙环境的综合作用使得SNNU-63具有高的C ₂ H ₂储存容量和高效的C ₂ H ₂和天然气净化性能。理想的吸附溶液理论计算，色谱柱穿透试验和经典的蒙特卡洛模拟结果表明，SNNU-63是应对环境下C ₂ H ₂ / CO ₂和C ₂ H ₂ / CH ₄混合物分离挑战的潜在材料条件。