1,1ʹ-Dimethyl-4,4ʹ-bipyridinium as a multivalent structure-directing counterion to anionic uranyl ion polycarboxylate complexes - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Polyhedron Année : 2024

1,1ʹ-Dimethyl-4,4ʹ-bipyridinium as a multivalent structure-directing counterion to anionic uranyl ion polycarboxylate complexes

Résumé

Seven uranyl ion complexes with polycarboxylates have been synthesized under solvo-hydrothermal conditions and in the presence of 1,1ʹ-dimethyl-4,4ʹ-bipyridinium (Me2bipy 2+) as structure-directing counterion. Two complexes were obtained with phthalate (pht 2-), [Me2bipy]2[(UO2)4(pht)4(O)2] (1), which is a discrete, bis(3-oxobridged) tetranuclear species, and {[Me2bipy][(UO2)3(pht)4(H2O)]}n (2), which crystallizes as a monoperiodic coordination polymer. The complex obtained with citric acid (H4cit), {[Me2bipy][UO2(Hcit)]2•H2O}n (3), assumes a well-known monoperiodic form. {[Me2bipy][(UO2)2(Hthftc)2]}n (4), obtained from tetrahydrofurantetracarboxylic acid (H4thftc), is also a monoperiodic polymer further assembled into layers through hydrogen bonding, the packing defining channels containing columns of stacked counterions. The previously reported {[Me2bipy][(UO2)2(tdc)3]}n (5), where tdc 2-is 2,5-thiophenedicarboxylate, is a diperiodic hcb network, with the counterions crossing the hexanuclear rings. One experiment with pimelate (pim 2-) gave the two complexes {[Me2bipy][(UO2)2(pim)3]}n (6) and {[Me2bipy][(UO2)4(pim)5(DMA)2]}n (7) (DMA = N,Ndimethylacetamide). Both 6 and 7 are diperiodic assemblies, but while 6 has the KIa topology previously found in other uranyl ion complexes with elongated dicarboxylate ligands, 7 is a very intricate and thick assembly with a packing displaying interdigitation. The weak interactions formed by the counterions are discussed through examination of Hirshfeld surfaces.

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Chimie
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hal-04393859 , version 1 (15-01-2024)

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Youssef Atoini, Sotaro Kusumoto, Yoshihiro Koide, Shinya Hayami, Yang Kim, et al.. 1,1ʹ-Dimethyl-4,4ʹ-bipyridinium as a multivalent structure-directing counterion to anionic uranyl ion polycarboxylate complexes. Polyhedron, In press, pp.116848. ⟨10.1016/j.poly.2024.116848⟩. ⟨hal-04393859⟩
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