The mixed‐metal pillar‐layered metal–organic frameworks of Zn(bdc)(DABCO)_0.5, Zn_0.5Cu_0.5(bdc)(DABCO)_0.5 and Cu(bdc)(DABCO)_0.5 (bdc = 1,4‐benzenedicarboxylate, DABCO = 1,4‐diazabicyclo[2.2.2]octane) are investigated for their local structures and gas adsorption properties. According to the obtained electron paramagnetic resonance (EPR) spectra, the distorted structures around Cu²⁺ are proposed to be tetragonally and orthorhombically elongated [CuO₄N] with the well fitted high‐order perturbation formulae of the EPR parameters. Due to the doped Cu²⁺, the adsorption isotherms of industrially relevant gases (CO₂, CO, CH₄ and N₂) and lower alkanes (CH₄, C₂H₆, C₃H₈, C₄H₁₀ and C₅H₁₂) are different, especially at different temperatures. By combining the structural properties and adsorption isotherms, a comprehensive study suggests that the ZnDABCO series can be a controllable tool in gas storage and separation.

中文翻译：

---

对一系列分层的Zn-1,4-二氮杂双环[2.2.2]辛烷金属-有机骨架的研究：混合金属中心的局部结构和吸附特性

Zn（bdc）（DABCO）_0.5，Zn _0.5 Cu _0.5（bdc）（DABCO）_0.5和Cu（bdc）（DABCO）_0.5（bdc = 1,4-苯二甲酸，研究了DABCO = 1,4-二氮杂双环[2.2.2]辛烷的局部结构和气体吸附特性。根据获得的电子顺磁共振（EPR）光谱，提出了Cu ²⁺周围的畸变结构是正交的和正交的伸长的[CuO ₄ N]，具有很好拟合的EPR参数的高阶扰动公式。由于掺杂了Cu ²⁺，工业相关气体（CO ₂，CO，CH ₄和N ₂）和低级烷烃（CH ₄，C ₂ H ₆，C ₃ H ₈，C ₄ H ₁₀和C ₅ H ₁₂）不同，尤其是在不同温度下。通过结合结构特性和吸附等温线，全面的研究表明ZnDABCO系列可以作为气体存储和分离的可控制工具。