Modulation of pore shape and adsorption selectivity by ligand functionalization in a series of “rob”-like flexible metal–organic frameworks
JOURNAL OF MATERIALS CHEMISTRY A(2018)
摘要
We report the synthesis of a new family of four new isoreticular metal-organic frameworks (MOFs) based on Cu-Cu paddle-wheel building units. The four MOFs contain 1D microchannels modulated by chemical functionalisation of a dicarboxylate ligand or the use of different bis-4,4'-pyridyl-like connectors behaving as ancillary linkers. A deep analysis of their CO2, H-2 and CH4 adsorption properties, combining both experimental and grand canonical Monte Carlo isotherms as well as in situ synchrotron X-ray diffraction, shows variable adsorption behaviour towards the studied gases, with some materials acting as molecular sieves with virtually infinite selectivity.
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关键词
ligand functionalization,metal–organic frameworks,adsorption selectivity
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