Rational assembly of functional Co-MOFs via a mixed-ligand strategy: synthesis, structure, topological variation, photodegradation properties and dye adsorption

Abstract

Four novel Co(ii) metal–organic frameworks were synthesized employing a rational design approach under solvothermal conditions.

Structure, magnetic properties and spin density of two alternative Mn(ii) coordination polymers based on 1,4-bis(2′-carboxyphenoxy)benzene

“…3, Mode II). In this case the dihedral angles α and β are 80.20 (12)°and 0°and are subtended by A/B and A/A i rings, respectively.…”

“…Oxygen atoms of the bcpb 2− link adjacent Mn (II) ions (3.3758(6) Å) to form the [Mn 2 (μ 1,1 -COO) 2 ] 2+ subunits. The ligands in complex 2 displays two different coordination modes, namely μ 3 -η 1 :η 1 :η 2 -O 8 :O 9 :O 11 :O 12 and μ 3 -η 1 :η 1 :η 1 -O 1 :O 5 : O 6 . In each of these, a ligand coordinates three Mn(II) ions.…”

“…Coordination polymers formed by metal cations and bridging ligands have attracted much attention. [1][2][3][4][5][6] Design and construction of coordination polymers (CPs) are currently of great interest in the fields of coordination chemistry and crystal engineering because the target materials display an intriguing variety of topologies, fascinating structures, interesting properties and potential applications, such as separation, catalysis, ion exchange, magnetism, luminescence and nonlinear optics; [7][8][9][10][11][12][13] this enumeration might well be expanded.…”

“…1,4-bis(2′-carboxylato phenoxy) benzene and 2,2′-bipy. The completely deprotonated H 2 bcpb in the compounds 1 and 2 exhibits four coordination modes: µ 2 -η 2 -O 1 :O 2 , µ 4 -η 2 :η 2 -O 4 :O 4 , µ 3 -η 1 :η 1 :η 2 -O 8 :O 9 :O 11 :O12 and µ 3 -η 1 :η 1 :η 1 -O 1 :O 5 :O 6 . Topologically, compound 1 displays a 3,4-connected net with Schläfli symbol {4•6 2 } 2 {4 2 •6 2 •8 2 } and compound 2 is a 1D chain structure.…”

Mechanistic investigation of photocatalytic degradation of organic dyes by a novel zinc coordination polymer

“…2 As a result, photocatalytic degradation of dye wastewater by oxidation has recently become an area of intensive research, 3 where metal-organic frameworks (MOFs) have attracted extensive attention as a new category of semiconductor material for photocatalytic degradation of organic dyes. [4][5][6][7][8][9][10][11][12] Mechanistic studies 13,14 of photocatalytic decomposition of organic dyes [15][16][17] reveal that catalysis consists of three major steps:…”