An investigation of a series of layered Zn‐1, 4‐diazabicyclo[2.2.2]octane metal–organic frameworks: local structure and adsorption properties of mixed‐metal centre. Issue 1 (25th January 2021)

• Record Type: Journal Article
• Authors: Ding, Chang-Chun; Chu, Xiao-Hong; Zhang, Meng-Jia; Fu, Jia
• Is Part Of: Acta crystallographica. Volume 77:Issue 1(2021)
• Page Start: 1
• Page End: 9
• Publication Date: 2021-01-25
• Subjects: ZnDABCO series -- doped Cu2+ -- electron paramagnetic resonance (EPR) -- local structures of mixed ligands -- adsorption properties
• DOI: 10.1107/S2052520620014602
• Languages: English
• ISSNs: 2052-5206

Abstract

Abstract : Local structures and adsorption properties for mixed‐metal pillar‐layered Zn–1, 4‐diazabicyclo[2.2.2]octane metal–organic frameworks are reported. Abstract : The mixed‐metal pillar‐layered metal–organic frameworks of Zn(bdc)(DABCO)0.5, Zn0.5 Cu0.5 (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 Cu 2+ are proposed to be tetragonally and orthorhombically elongated [CuO4 N] with the well fitted high‐order perturbation formulae of the EPR parameters. Due to the doped Cu 2+, the adsorption isotherms of industrially relevant gases (CO2, CO, CH4 and N2 ) and lower alkanes (CH4, C2 H6, C3 H8, C4 H10 and C5 H12 ) 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.