Efficient and economical separation of 1,3-butadiene (C₄H₆) from C₄ hydrocarbons is imperative yet challenging in industrial separation processes. Herein, a guest-induced flexible Mn-bpdc metal–organic framework (MOF) has been employed to separate C₄H₆ from C₄ hydrocarbons, including n-butene (n-C₄H₈)_, iso-butene (iso-C₄H₈), n-butane (n-C₄H₁₀), and iso-butane (iso-C₄H₁₀). Significantly, C₄H₆ can instantaneously induce gate-opening of Mn-bpdc MOF at 0.13 bar and 298 K, thus significant amounts of C₄H₆ can be adsorbed, while other C₄ hydrocarbons cannot induce the gate-opening even at 1 bar. The uptake selectivities of Mn-bpdc MOF for C₄H₆/n-C₄H₈ and C₄H₆/iso-C₄H₈ are up to 40.0 and 45.0 at 298 K and 1 bar, respectively, both surpassing all the reported adsorbents. In addition, breakthrough experiments verify that C₄H₆/n-C₄H₈, C₄H₆/iso-C₄H₈, C₄H₆/n-C₄H₁₀, C₄H₆/iso-C₄H₁₀, C₄H₆/n-C₄H₈/n-C₄H₁₀, and C₄H₆/iso-C₄H₈/iso-C₄H₁₀ mixtures can be efficiently separated. More importantly, Mn-bpdc possesses excellent water stability and outstanding regeneration ability for C₄H₆ separation, making it a new benchmark for C₄H₆ purification.

中文翻译：

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具有开门效应的柔性金属-有机骨架高效分离 C4 烃中的 1,3-丁二烯

从 C ₄烃中高效且经济地分离 1,3-丁二烯 (C ₄ H _{6 ) 是必要的，但在工业分离过程中具有挑战性。}本文采用客体诱导的柔性 Mn-bpdc 金属有机骨架 (MOF) 将 C ₄ H ₆从 C ₄烃中分离出来，包括正丁烯 ( n -C ₄ H ₈ ) _、异丁烯 (iso- C ₄ H ₈ )、正丁烷( n -C ₄ H ₁₀ )和异丁烷(iso-C ₄ H₁₀ )。值得注意的是，C ₄ H ₆可以在 0.13 bar 和 298 K 下瞬间诱导 Mn-bpdc MOF 的门打开，因此可以吸附大量的 C ₄ H _{6 ，而其他 C 4}烃即使在 1 时也不能诱导门打开酒吧。Mn-bpdc MOF 对 C ₄ H ₆ / n -C ₄ H ₈和 C ₄ H ₆ /iso-C ₄ H ₈的吸收选择性在 298 K 和 1 bar 时分别高达 40.0 和 45.0，均超过所有报告的吸附剂。此外，突破性实验证实 C ₄H ₆ / n -C ₄ H ₈ , C ₄ H ₆ /iso-C ₄ H ₈ , C ₄ H ₆ / n -C ₄ H ₁₀ , C ₄ H ₆ /iso-C ₄ H ₁₀ , C ₄ H ₆ / n -C ₄ H ₈ / n -C ₄ H ₁₀和 C ₄ H ₆ /iso-C ₄ H ₈/iso-C ₄ H ₁₀混合物可以有效分离。更重要的是，Mn-bpdc对C ₄ H ₆分离具有优异的水稳定性和出色的再生能力，使其成为C ₄ H ₆纯化的新标杆。