Synthesis, crystal structures, and magnetic properties of three nickel (II) coordination polymers based on a rigid pyrazine carboxylic acid containing different N ligands

Impact of N-donor auxiliary ligands on two new Co(ii)-based MOFs with N-heterocyclic ligands and a magnetism study

“…Recently, we have successfully utilized 2,4-[6-(4-carboxyphenyl)pyrazin-2-yl]benzoic acid (H 2 L) and Ni( ii ) ions to create an amazing network. 19 Complexes 1–2 imply the influence of the different proportions of reactants auxiliary ligands on the resulting frameworks. Here, two different N-donors (4,4′-bipy and dib) were selected to investigate their effects on the structure and dimensionality of the resulting frameworks 1 and 2 (Scheme 1).…”

“…17 Therefore, the combination of pyrazine-carboxylates has huge potentiality for the construction of interesting topologies. 18 Recently, we successfully utilized 2,4-[6-(4-carboxyphenyl)pyrazin-2-yl]benzoic acid (H 2 L) and Ni( ii ) ions to create an amazing network, 19 which features interesting active metal sites. As a continuation of this work, we synthesized and reported herein two new MOFs (Scheme 1), namely [Co 2 (L) 2 (4,4′-bipy)] n ( 1 ) and {[Co(L)(dib) 0.5 (H 2 O) 2 ]·H 2 O} n ( 2 ).…”

Synthesis, structure, and investigation of unique magnetic properties in two novel Mn-based coordination polymers

“…In recent years, they have gained widespread attention due to their role in enhancing magnetic exchange. [20][21][22][23] In addition, high-spin state (S = 5/2) Mn(II) with five unpaired electrons is often employed to construct novel structures with unique magnetic properties. Many previous literature studies report several carboxylate-bridged Mn(II) complexes that exhibit remarkable magnetic characteristics.…”

A New 1D Ni (II) Coordination Polymer of s-Triazine Type Ligand and Thiocyanate as Linker via Unexpected Hydrolysis of 2,4-Bis(3,5-dimethyl-1H-pyrazol-1-yl)-6-methoxy-1,3,5-triazine

“…In addition, they showed prospective applications as luminescent [53], conductive [54], and for the recovery of trace metal ions [55]. Dong and coworkers reported the structure and magnetic properties of some Ni(II) coordination polymers based on 2,4-[6-(4-carboxyphenyl)pyrazin-2-yl]benzoic acid as a NO-donor ligand [56]. The last decade has witnessed an upsurge in research efforts for the development of coordination polymers, which have interesting molecular architectures due to their novel and diversified structural characteristics.…”