Hydrothermal Assembly, Structural Multiplicity, and Catalytic Knoevenagel Condensation Reaction of a Series of Coordination Polymers Based on a Pyridine-Tricarboxylic Acid.

A pyridine-tricarboxylic acid, 5-(3',5'-dicarboxylphenyl)nicotinic acid (Hdpna), was employed as a adjustable block to assemble a series of coordination polymers under hydrothermal conditions. The seven new coordination polymers were formulated as [Co(Hdpna)(dpey)]·HO (), [Zn(dpna)(phen)] (), [Co(dpna)(2,2'-bipy)] (), [Zn(dpna)(2,2'-bipy)] (), [Co(dpna)(4,4'-bipy)(HO)]·2HO (),[Co(bpb)(HO)][Co(dpna)(HO)]·3HO (), and [Mn(dpna)(dpea)] (), wherein 1,2-di(4-pyridyl)ethylene (dpey), 1,10-phenanthroline (phen), 2,2'-bipyridine(2,2'-bipy),4,4'-bipyridine(4,4'-bipy),1,4-bis(pyrid-4-yl)benzene (bpb), and 1,2-di(4-pyridyl)ethane (dpea) were employed as auxiliary ligands. The structural variation of polymers - spans the range from a 2D sheet (-, , and ) to a 3D metal-organic framework (MOF, ).

Syntheses, Crystal Structures, and Catalytic Properties of Three Cu(II) and Cobalt(II) Coordination Compounds Based on an Ether-Bridged Tetracarboxylic Acid.

Three new products, [Cu(dppa)(2,2'-bipy)(HO)]·2HO (), [Co(dppa)(phen)(HO)]·2HO (), and [Co(dppa)(4,4'-bipy)(HO)]·3HO () were synthesized using a hydrothermal method from Cu(II) and Co(II) metal(II) chlorides, 3-(3,4-dicarboxyphenoxy)phthalic acid (Hdppa), and different auxiliary ligands, namely 2,2'-bipyridine (2,2'-bipy),1,10-phenanthroline (phen), and 4,4'-bipyridine (4,4'-bipy). Products - were characterized by elemental analysis, FTIR, TGA, PXRD, SEM, and single-crystal X-ray crystallography. The structure of features a 1D chain of the 2C1 topological type.

Six metal-organic architectures from a 5-methoxyisophthalate linker: assembly, structural variety and catalytic features.

A methoxy-functionalized isophthalic acid, 5-methoxy isophthalic acid (Hmia), was used a versatile linker for assembling six new metal(ii) compounds under hydrothermal conditions. The obtained products were [Cu(μ-mia)(phen)(HO)]·2HO (1), [Mn(μ-mia)(phen)] (2), [Co(μ-mia)(2,2'-bipy)(HO)]·HO (3), [Co(μ-mia)(μ-4,4'-bipy)]·HO (4), [Co(μ-mia)(py)] (5), and [Cd(μ-mia)(py)(HO)]·HO (6), where phen(1,10-phenanthroline), 2,2'-bipy(2,2'-bipyridine), 4,4'-bipy(4,4'-bipyridine) or py(pyridine) were incorporated as auxiliary ligands. The crystal structures of 1-6 range from 0D (1) and 1D (2, 3, 5, 6) CPs to a 2D network (4) with a variety of topological types.