Abstract
The mix-ligand system of 5-(4-carboxy-2-nitrophenoxy)isophthalic acid (HСn-H2Ipa) and dipyridyl-type molecule produces two M(II) porous coordination polymers, namely {[Zn(HCn-Ipa)(Dpe)(H2O)] · 2H2O} n (I) and {[Co(Cn-HIpa)(Dpe)(H2O)3] · 2.5H2O} n (II) (Dpe = 1,2-di(4-pyridyl) ethylene). Structure determinations reveal that two complexes feature different one-dimensional (1D) polymers assembling into supramolecular microporous frameworks with different thermal stabilities. The 3D supramolecular frameworks of complex I show relatively lower stability, which can be caused by relatively larger porous cavity absent of the strong hydrogen bonds interaction, whereas thick-layer blocks in complex II are cohered further together by H-bonding interactions to form its 3D supramolecular network with relatively higher stability, indicating extraordinarily stable H-bonding systems; CIF files CCDC nos. 966919 (I) and 966920 (II).
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Xin, L.Y., Ju, F.Y., Li, X.L. et al. Thermal stabilities and crystal structures of two supramolecular microporous frameworks based on carboxylate-dipyridyl mix-ligands. Russ J Coord Chem 43, 55–62 (2017). https://doi.org/10.1134/S1070328417010080
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DOI: https://doi.org/10.1134/S1070328417010080