Hydrothermal Synthesis of Metal−Organic Frameworks Based on Aromatic Polycarboxylate and Flexible Bis(imidazole) Ligands

Abstract

Via hydrothermal synthesis, the self-assembly of M(II) ions, H3BTC or H2NDC with three structure-related flexible bis(imidazole) ligands, L1, L2, and L3, generated six metal−organic polymers (M = Co, Ni, Zn; BTC = 1,3,5-benzenetricarboxylate, NDC = 1,2-benzenebicarboxylate, L1 = 1,4-bis(imidazol-1-ylmethyl)benzene, L2 = 1,1′-(1,4-butanediyl)bis(imidazole), L3 = 1,1′-(1,4-hexanediyl)bis (imidazole)): {Co3(L1)3(BTC)2(μ-H2O)3·2H2O} n (1), {Zn2(L2)(HBTC)2·2H2O} n (2), {Co(L3)(HBTC)} n (3), {Co(L1) (NDC)} n (4), {Ni(L2)(NDC)} n (5), and {Co(L3) (NDC)} n (6). The structure of 1 is the rare 4-connected self-penetrating metal−organic framework (MOF) with the (63)2(64·82)2(62·84) topology notation; polymers 2 and 6 are two-dimensional (2D) (3,4)-connected and 4-connected nets, respectively. If the O−H…O/2.631 Å hydrogen bonds between HBTC2− dianions are not accounted for, then polymer 3 is a 2D (3,5)-connected net; contrarily, it is a pillar-layered three-dimensional supramolecular framework characterized by (4,5)-connected (42·62·82)(42·68) topology. 4 and 5 show 4-connected MOFs with 65·10 and 65·8 CdSO4-type topology, respectively. Furthermore, their thermal properties are studied by thermogravimetric analysis.

A Hydroscopic Self‐Catenated Net Formed by Borromean Layers Interlocked by Ferrocenyl Bridging Ligands

“…To the best of our knowledge, most of the reported self-catented polymers are built on 4-, 5-, 6-, 8-, (3,5)-, or (3,6)-connected nodes; [8] the (3,4)-connected self-catenated 3D polymers are very rare. [9] Figure 3. Schematic representation of the (3,4)-connected self-catenated 3D framework highlighting the catenated eight-membered shortest rings (thick stick).…”

Crystal structure of poly[bis-μ3-[(2-(1,2,4-triazol-1-yl)acetato-κ3 O:O':N)]- cobalt(II), [Co(C4H4N3O2)2]n, C8H8CoN6O4

“…Al arge number of mononuclear,o ligonuclear,a nd polynucleart ransitionmetal complexes of 1-and 4-substituted 1,2,4-triazole derivatives have been synthesized and characterized [5][6][7][8]. On the other hand, because of the diversity of the coordination modes and high structural stability, carboxylate ligands are frequently used for the construction of MOFs [9][10][11]. In this paper, we select 2-(1,2,4-triazol-1-yl)acetate (tza)toreactwith Co(II)ions to obtainanew MOF.…”

Crystal structure of aqua-(1,10-phenanthroline)-(2-(1,2,4-triazol-1-yl)- acetate)copper(II)nitrate, C16H14CuN6O6

“…A large number of mononuclear, oligonuclear, and polynuclear transition metal complexes of 1-and 4-substituted 1,2,4-triazole derivatives have been synthesized and characterized due to their interesting properties and novel topologies [5][6][7][8]. On the other hand, because of the diversity of the coordination modes and high structural stability, carboxylate ligands are frequently used for the construction of MOFs [9][10][11]. In this paper, we selected 2-(1,2,4-triazol-1-yl)acetate (tza) and 1,10-Phenanthroline (phen) to react with Cu(II) ions to obtain a new MOF.…”