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Title: Influence of secondary ligand on structures and topologies of lanthanide coordination polymers with 1,3,5-triazine-2,4,6-triamine hexaacetic acid
Authors: Bunlawee Yotnoi
Natthaya Meundaeng
Watcharee Funfuenha
Mookda Pattarawarapan
Timothy J. Prior
Apinpus Rujiwatra
Keywords: Chemistry
Materials Science
Issue Date: 2-Dec-2015
Abstract: © 2015 Taylor and Francis. A series of new lanthanide coordination polymers has been synthesized and structurally characterized; [Ln4(TTHA)2(pzac)(H3O)2(H2O)]·5H2O (Ln = Pr (1a) and Nd (1b)), [Sm8(TTHA)4(pzac)0.5(H3O)(H2O)7.5]·4H2O (2), [Ln4(HTTHA)2(SO4)(H2O)4]·5H2O (Ln = Pr (3a) and Nd (3b)), where H6TTHA = 1,3,5-triazine-2,4,6-triamine hexaacetic acid, and H2pzac = 2,5-dioxo-piperazine-1,4-diacetic acid. The compounds feature 3-D frameworks comprising the deprotonated H6TTHA as the primary ligand and either the in situ generated pzac2-or sulfate as the secondary ligands. The influence of the deprotonated H6TTHA in directing the framework structures through preferential coordination modes and molecular conformation is described. The effect of the secondary ligands in increasing the compactness of the frameworks and in the alternation of the framework topologies based on the four-connected pts type is described.
ISSN: 10290389
Appears in Collections:CMUL: Journal Articles

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