Metal-organic frameworks (MOFs) with precisely controlled pore dimensions have greatly enriched the versatility of molecular sieving materials. Here, we report a channel-pore interconnected MOF (JNU-2) for direct production of o-xylene from six-component BTEXs (benzene, toluene, ethylbenzene, o-xylene, m-xylene, and p-xylene) in a single adsorption process. Individual adsorption measurements show complete exclusion of o-xylene and benchmark adsorption of other BTEXs. Competitive adsorption studies reveal record-high adsorption selectivity of other BTEXs over o-xylene. Vapor-phase breakthrough experiments verify its superior separation potential for sieving o-xylene from BTEXs. We further demonstrate o-xylene purification by simply soaking JNU-2 (10 g) in BTEXs (18 mL, 90% o-xylene) at room temperature, realizing an average of 15.2 mL of o-xylene (99.5%+ purity, 94% recovery) for 10 cycles. Considering its exceptional stability, JNU-2 may have great promise for energy-efficient o-xylene separation from BTEXs.

中文翻译：

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使用通道孔互连金属有机框架从六组分 BTEX 中直接生产邻二甲苯


具有精确控制孔径的金属有机框架 （MOF） 极大地丰富了分子筛材料的多功能性。在这里，我们报道了一种通道孔互连 MOF （JNU-2），用于在一次吸附过程中从六组分 BTEX（苯、甲苯、乙苯、邻二甲苯、间二甲苯和对二甲苯）直接生产邻二甲苯。单个吸附测量显示完全排除邻二甲苯和其他 BTEX 的基准吸附。竞争性吸附研究表明，其他 BTEX 对邻二甲苯的吸附选择性创下历史新高。气相突破实验验证了其从 BTEX 中筛分邻二甲苯的卓越分离潜力。我们通过在室温下将 JNU-2 （10 g） 简单地浸泡在 BTEX（18 mL，90% 邻二甲苯）中，在 10 个循环中实现平均 15.2 mL 的邻二甲苯（纯度 99.5%+，回收率 94%），进一步证明了邻二甲苯纯化。考虑到其卓越的稳定性，JNU-2 可能在从 BTEX 中高效分离邻二甲苯方面具有很大的前景。