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- W2089346906 endingPage "1018" @default.
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- W2089346906 abstract "Reported herein is a synthetic and structural study of the coordination chemistry of 4,4′,6,6′-tetracarboxylic acid-2,2′-bipyridine (H4tcbp) with some lanthanide ions. The reaction of H4tcbp under acidic hydrothermal conditions with Ln(III) (Ln = La, Eu and Gd) in 1 : 1 stoichiometric ratio led to the formation of crystalline {[La(Htcbp)(H2O)3]·H2O}, 1, {[La(Htcbp)(H2O)]}, 2, {[Eu(Htcbp)(H2O)]·2 H2O}, 3 and {[Gd(Htcbp)(H2O)]·2 H2O}, 4; which were structurally characterised. Using a 1 : 1 H2O/DMF-solution in combination with Eu(III) and H4tcbp gave {[Eu(tcbp)(H2O)]·(Me2NH2)}, 5, which was also structurally characterised. The acidic conditions in 1–4 yielded 1 : 1 neutral {Ln : Htcbp} complexes whereas in 5 the H4tcbp ligand is fully deprotonated and charge neutrality is brought about by the presence of a dimethylammonium cation (arising through the hydrolysis of the DMF solvent). Complex 1 forms a 1D coordination polymer which cross-links through extensive hydrogen bonding to form a complicated 3D network. Each {Ln(Htcbp)} moiety in 2 acts as a four-connecting node and forms a 2D sheet with (4,4)-topology, which is different to the 2D sheets with (4,4)-topology formed in isostructural 3 and 4. Within 5 each [Eu(tcbp)]− moiety acts as a 5-connecting node forming a heretofore unprecedented 2D 5-connected network with (33.43.54) topology. Furthermore, each 2D sheet in 2–5 features an array of hydrogen bonded contacts both within and between neighbouring sheets to give complicated 3D networks." @default.
- W2089346906 created "2016-06-24" @default.
- W2089346906 creator A5032682469 @default.
- W2089346906 creator A5052865846 @default.
- W2089346906 creator A5077691241 @default.
- W2089346906 creator A5090866676 @default.
- W2089346906 date "2008-01-01" @default.
- W2089346906 modified "2023-09-27" @default.
- W2089346906 title "Synthesis and structural characterisation of lanthanide coordination polymers featuring 4,4′,6,6′-tetra-carboxy-2,2′-bipyridine and rare network topology" @default.
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- W2089346906 doi "https://doi.org/10.1039/b801985a" @default.
- W2089346906 hasPublicationYear "2008" @default.
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