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  • Title: Topologies of metal-organic frameworks based on pyrimidine-5-carboxylate and unexpected gas-sorption selectivity for CO(2).
    Author: Seo J, Jin N, Chun H.
    Journal: Inorg Chem; 2010 Dec 06; 49(23):10833-9. PubMed ID: 21062027.
    Abstract:
    A simple and multitopic ligand, pyrimidine-5-carboxylate (pmc), has been used to obtain a series of metal-organic frameworks (MOFs) based on Co(2+), Cd(2+), and Cu(2+). The networks possess well-defined topologies of body-centered-cubic, rutile, and interpenetrated NbO structures, respectively. Among those, [Cu(pmc)(2)] possesses a permanent porosity resulting from straight one-dimensional channels of 5.5 Å free passages. Unexpectedly, this porous MOF displays a highly selective sorption behavior for CO(2), and the sorptions of N(2), Ar, O(2), H(2), and CH(4) at two different temperatures are found to be negligible. The results of diffraction and spectroscopic analyses exclude framework dynamics or incomplete evacuation as the origin of the gas-sorption selectivity.
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