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Extended H-bond networks based on guanidinium H-donors and [Zr(A) 4]4- H-acceptor units: modulation of the assemblage and guest accessible volume by chemical design (A = oxalate, dihydrobenzoquinonate, chloranilate)

AutorRoques, Nans ; Imaz, Inhar ; Sutter, Jean-Pascal
Fecha de publicación2013
EditorRoyal Society of Chemistry (Great Britain)
CitaciónNew Journal of Chemistry 37(11): 3476-3487 (2013)
ResumenSupramolecular assemblages between three different [Zr(A)4] 4- metallotectons (A stands for oxalate, Ox2-; dihydrobenzoquinonate, DBQ2-; or chloranilate CA2-) and three different guanidinium cation analogues (guanidinium, H-Guan+; 2-amino-imidazolium, H-AIm+; and N,N-dimethylguanidinium, H-DmG +) have been envisioned to investigate how the anionic and/or cationic building-block characteristics influence the connectivity and/or the dimensionality of frameworks based on charge-assisted H-bonds. Added to the benchmark material, {(H-Guan)4[Zr(Ox)4]}, (1), the crystal structures of six architectures of formula {(H-AIm)4[Zr(Ox) 4]}·5H2O (2), {(H-DmG)4[Zr(Ox) 4]}·0.5H2O (3), {(H-Guan)4[Zr(DBQ) 4]}·1.5H2O (4), {(H-Guan)4[Zr(CA) 4]}·5.85H2O (5), {(H-AIm)4[Zr(CA) 4]}·H2O (6), and {K2(H 2O)3(H-DmG)2[Zr(DBQ)4]} ·H2O (7) have been characterized. While 1 consists of a two dimensional (2D) H-bonded network with compact structure, four out of the six supramolecular architectures (2-7) form 3D H-bonded networks, and three of these materials (namely, 2, 4 and 5) present open-framework architectures with solvent accessible voids ranging from 8 to 13%. Compounds 4-7 are the first examples of H-bonded frameworks constructed from [Zr(DBQ)4] 4- and [Zr(CA)4]4- metallotectons. © 2013 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
Identificadoresdoi: 10.1039/C3NJ00520H
issn: 1144-0546
e-issn: 1369-9261
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