Nickel coordination polymers with {48.62} and bnn topologies constructed from common square-pyramidal 5-connected nodes

Proton-Conducting Cobalt(II) 3D MOFs Incorporating Bis(imidazole) and Polycarboxylate Linkages: Framework Topology and Interpenetration

“…The conflation of dicarboxylate and bis­(imidazole) as ancillary ligands could result in a variety of supramolecular architectures with intriguing topologies. − For example, we reported some intriguing CPs incorporating polycarboxylate ligands and 9,10-di­(1 H -imidazol-1-yl)­anthracene. , Herein, we present two new cobalt­(II) CPs based on polycarboxylate ligands and 2,6-di­(1 H -imidazol-1-yl)­pyridine (dip). − The imidazole precursor has an additional pyridine functionality. One of the carboxylate ligands is based on 4,4′-oxybis­(benzoic acid) (H 2 obb), which contains two carboxylic groups for the coordination of metals and an additional ethereal oxygen functionality. − The other polycarboxylate ligand is 1,2,4,5-benzenetetracarboxylic acid (H 4 btec), which bears four carboxylic acid moieties. − Two of the carboxylic acid groups on btec could coordinate to metal centers, whereas the uncoordinated groups could point toward channels to interact with guest molecules.…”

“…41−45 For example, we reported some intriguing CPs incorporating polycarboxylate ligands and 9,10-di(1H-imidazol-1-yl)anthracene. 46,47 Herein, we present two new cobalt(II) CPs based on polycarboxylate ligands and 2,6-di(1H-imidazol-1-yl)pyridine (dip). 48−50 The imidazole precursor has an additional pyridine functionality.…”

cis- and trans-9,10-di(1H-imidazol-1-yl)-anthracene based coordination polymers of ZnII and CdII: synthesis, crystal structures and luminescence properties

“…Related L-based coordination polymers with Cd II , Co II , and Ni II were previously reported (Table 3). [23][24][25][26] Most of the reported CPs show trans-L, and only one example of Cd II has been reported with a mixed ligand system where L adopts cis-conformation [Cd(Hbtc)(cis-L)]·3(H 2 O). 23 This complex was obtained from water solution at 140°C under hydrothermal conditions, in which L might be quite flexible with respect to the change of conformation.…”

“…However, due to the limited solubility of L in H 2 O-organic solvent systems, a complete dissolution of L may not take place, a situation which may explain the scarce reports of complexes with trans-L conformation. [23][24][25][26] Based on the obtained results and analyzed structures of L, it seems that not only the polarity of the solvent(s) determines the cis or trans arrangement of L, but also nature of the metal ion and the counter ion contribute to the configuration of L. The relative stiffness of L based on the central rigid anthracene moiety implies that the ligand acts as a bridging rather than a chelating ligand, which leads to the formation of polymeric structures with Zn II and Cd II rather than of molecular complexes.…”

A Highly Chemical and Thermal Stable Porous Metal–Organic Framework with Unusual 5-Connected zfy Topology

“…Some 8-, 9-, and even highly connected network structures had also been synthesized in recent years . Surprisingly, examples of 5-connected uniform or uninodal networks are extremely scarce, and their structural characteristics, properties, and the relationship are still a mystery.…”