Separating n‐butene and iso‐butene through adsorption represents a viable and energy‐efficient strategy. However, developing porous adsorbents that can effectively discern the subtle differences between these isomers remains a significant challenge. This study demonstrates that a zinc‐based coordination network (CALF‐20) exhibits a slight pore expansion with increasing temperature, creating nanochannels that preferentially adsorb n‐butene over iso‐butene. This unique temperature‐dependent dynamic behavior enables effective sieving of n‐butene from iso‐butene within the temperature range of 273 to 423 K, a phenomenon not previously observed. Notably, CALF‐20 exhibits the highest n‐butene adsorption capacity (2.62 mmol g−1) and the highest selectivity ratio (14.7) among sieving materials reported to date for n‐butene isomers. Modeling calculations show that dynamic factors play a significant role in achieving such high adsorption separation capabilities. At medium temperatures, the initial separation of n‐butene and iso‐butene is achievable, which may provide a foundation for the future design of adsorbents intended to achieve efficient separation of n‐butene/iso‐butene under comparable temperature conditions. In the future, the intricate structure dynamics and enhanced capacity for molecular recognition will offer a new pathway for developing advanced sieving materials.

中文翻译：

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通过具有记录分离的锌基配位网络对正丁烯和异丁烯进行宽温筛分


通过吸附分离正丁烯和异丁烯是一种可行且节能的策略。然而，开发能够有效辨别这些异构体之间细微差异的多孔吸附剂仍然是一个重大挑战。这项研究表明，锌基配位网络 （CALF-20） 随着温度的升高而表现出轻微的孔隙膨胀，从而产生优先吸附 n-丁烯而不是异丁烯的纳米通道。这种独特的温度相关动态行为能够在 273 至 423 K 的温度范围内有效地从异丁烯中筛分正丁烯，这是以前未观察到的现象。值得注意的是，在迄今为止报道的正丁烯异构体筛分材料中，CALF-20 表现出最高的正丁烯吸附能力 （2.62 mmol g-1） 和最高的选择性比 （14.7）。建模计算表明，动态因素在实现如此高的吸附分离能力方面起着重要作用。在中等温度下，可以实现正丁烯和异丁烯的初始分离，这可能为未来设计用于在类似温度条件下实现正丁烯/异丁烯高效分离的吸附剂设计奠定基础。未来，复杂的结构动力学和增强的分子识别能力将为开发先进的筛分材料提供一条新的途径。