Ru-HKUST-1 (Ru₃(btc)₂X_1.5; btc^3– = 1,3,5-benzenetricarboxylate; X^– = chloride, acetate, trimesate, hydroxide) has received considerable attention as a result of its structure type, tunability, and the redox-active nature of its constituent metal paddlewheel building units. When compared to other members of the HKUST-1 family, its surface area is typically reported as ∼25% lower than expected. In contrast to this, a related ruthenium-based porous coordination cage, Ru₂₄(^tBu-bdc)₂₄Cl₁₂, displays the expected surface area when compared to Cr²⁺ and Mo²⁺ analogs. Here, we examine the factors that result in this decreased surface area for the metal–organic framework (MOF). We show that with appropriate solvent exchange and activation conditions, Ru-HKUST-1 can display a BET surface area as high as 1439 m²/g. We utilize a combination of spectroscopic and diffraction techniques to accurately determine the structure of the MOF, which is most accurately described here as Ru₃(btc)₂(OAc)_1.07Cl_0.43, as prepared under our conditions. Furthermore, simply treating the sample as air-sensitive upon isolation greatly improved the adsorption selectivities toward unsaturated molecules.

中文翻译：

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阐明金属有机框架 Ru-HKUST-1 的结构

Ru-HKUST-1（Ru ₃ (btc) ₂ X _1.5；btc ^3– = 1,3,5-苯三甲酸酯；X ^– = 氯化物、乙酸盐、均苯三酸、氢氧化物）因其结构类型而受到相当多的关注，可调谐性及其组成金属明轮构建单元的氧化还原活性性质。与 HKUST-1 家族的其他成员相比，其表面积通常比预期低约 25%。与此相反，相关的钌基多孔配位笼Ru ₂₄ ( ^t Bu-bdc) ₂₄ Cl ₁₂与Cr ²⁺和Mo ²⁺类似物相比显示出预期的表面积。在这里，我们研究了导致金属有机框架（MOF）表面积减少的因素。我们表明，在适当的溶剂交换和活化条件下，Ru-HKUST-1 可以表现出高达 1439 m ² /g 的 BET 表面积。我们利用光谱和衍射技术的组合来准确确定 MOF 的结构，这里最准确地描述为 Ru ₃ (btc) ₂ (OAc) _1.07 Cl _0.43，在我们的条件下制备。此外，在分离时简单地将样品处理为空气敏感的样品大大提高了对不饱和分子的吸附选择性。