Fluorite topology in lanthanoid coordination polymers with Di- and trimetallic building blocks

Jan M. Gotthardt, Keith F. White, Brendan F. Abrahams, Chris Ritchie, Colette Boskovic

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32 Citations (Scopus)

Abstract

Reaction of the pseudotetrahedral tetracarboxylic acid proligand tetrakis(4-carboxyphenyl)silane (H 4L) with salts of various lanthanoid metals has afforded three new lanthanoid coordination polymers: {[H 3O] 2[Ce 2(L) 2(H 2O) 2]•2DMF•2H 2O} (1), {[Eu 3L 2(NO 3)(DMF) 4(H 2O)] •0.5DMF•6H 2O} (2), and {Eu(HL)(DMF) 2(H 2O)]•DMF•2.5H 2O} (3) (DMF = N,N′-dimethylformamide), which have been structurally characterized by single-crystal X-ray diffraction. Compounds 1 and 2 are both noninterpenetrated three-dimensional networks that display the rare fluorite (CaF 2) topology. In compound 1, the fully deprotonated L 4- ligands act as pseudotetrahedral 4-connecting nodes and dinuclear cerium-carboxylate building blocks act as 8-connecting nodes, while in compound 2 the L 4- ligands and trinuclear europium-carboxylate units are 4- and 8-connecting, respectively. In contrast, compound 3 exhibits a two-dimensional layered structure with triply deprotonated HL 3- ligands acting as 3-connecting units, linking single europium centers within each layer. Gas sorption studies of 2 show a high affinity of the pretreated microcrystalline solid for carbon dioxide gas.

Original languageEnglish
Pages (from-to)4425-4430
Number of pages6
JournalCrystal Growth and Design
Volume12
Issue number9
DOIs
Publication statusPublished - 5 Sep 2012
Externally publishedYes

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