Crystal Structures, Magnetism, and Dye Degradation Catalytic Properties of Copper 2‐Methoxycarboxybenzoate Coordination Complexes

Abstract

Copper coordination complexes containing the 2‐methoxycarboxybenzoate (2‐mcob) ligand show different topologies depending on the nature of the dipyridyl coligand. [Cu2(2‐mcob)2(ebin)]n (1) [ebin = ethanebis(isonicotinamide)] shows a ladder structure based on anti‐syn bridged [Cu(OCO)]n chain motifs. [Cu2(2‐mcob)2(bbin)(H2O)2] (2) [bbin = butanebis(isonicotinamide)] displays a dimeric molecular structure. [Cu2(2‐mcob)2(hbin)]n (3) [hbin = hexanebis(isonicotinamide)] manifests a ladder structure very similar to that of 1. {[Cu(2‐mcob)(dpa)]·H2O}n (4) [dpa = bis(4‐pyridyl)amine] shows a chain coordination polymer structure. All four materials showed significant promise as heterogeneous degradation catalysts for Congo Red dye in aqueous suspension under ultraviolet irradiation. Variable temperature magnetic susceptibility experiments for 1 indicated the presence of weak antiferromagnetic exchange (g = 2.059(2), J = –0.84(2) cm–1). Thermal degradation behavior is also discussed.

Two isostructural oxalato-bridged dimetallic heptanuclear [BaII3MIII4] complexes (M = Cr; Fe) associated with 3-aminopyridinium cations: Synthesis, crystal structure and magnetic properties

“…The slight increase of χMT at high temperatures for 1 and 2 suggests the occurrence of a moderately weak ferromagnetic intramolecular interactions between the M III ions through the tris(oxalato)metalate(III) units [35][36][37]. The decrease in the value of the product χMT at very lower temperatures agrees with the occurrence of weak antiferromagnetic interactions between M III centres in both compounds [33,[38][39][40].…”

Synthesis, crystal structures and vapor adsorption properties of mercury(II) coordination polymers derived from two dipyridylamide ligands

“…[1][2][3][4][5][6] This intriguing class of materials have demonstrated multifunctional properties in diverse applications such as ion exchange, gas storage, molecular separation, photochemistry, heterogeneous catalysis for organic transformations, and more recently as possible sensors for the detection of explosive compounds. [7][8][9][10][11][12][13] The striking aesthetic appeal of their fascinating architectures and topologies of coordination polymers is also an undeniable impetus for continued investigation. So far, a variety of one-, two-or three-dimensional (1D to 3D) network topologies have been constructed and structurally characterized.…”

“…There has been continuing and increasing interest in the design, structural characterization, and properties measurements of coordination polymers (CPs) in the past few decades [1–6] . This intriguing class of materials have demonstrated multifunctional properties in diverse applications such as ion exchange, gas storage, molecular separation, photochemistry, heterogeneous catalysis for organic transformations, and more recently as possible sensors for the detection of explosive compounds [7–13] . The striking aesthetic appeal of their fascinating architectures and topologies of coordination polymers is also an undeniable impetus for continued investigation.…”