Synthesis, crystal structure and photocatalytic properties of a three-dimensional copper(II) metal–organic framework based on 1,3,5-tris(2-methylimidazol-1-yl)benzene

A three-dimensional metal–organic framework, namely, poly[[bis(μ3-benzene-1,3,5-tricarboxylato)bis[μ3-1,3,5-tris(2-methylimidazol-1-yl)benzene]tricopper(II)] hexahydrate], {[Cu3(C9H3O6)2(C18H18N6)2]·6H2O} n or {[Cu(BTC)2/3(TMIB)2/3]·2H2O} n , (I) [TMIB is 1,3,5-tris(2-methylimidazol-1-yl)benzene and H3BTC is benzene-1,3,5-tricarboxylic acid], has been synthesized under solvothermal conditions and structurally characterized by elemental analysis, IR spectroscopy, single-crystal X-ray diffraction and thermogravimetric analysis (TGA). Compound (I) features an unusual three-dimensional (3,4)-connected 2-nodal net with {83}4{86}3 topology. Photocatalytic investigations indicate that (I) affords good photocatalytic capabilities in the degradation of methylene blue (MB). Furthermore, the possible photocatalytic mechanism is discussed.

Metal–organic frameworks derived from a semi-rigid anthracene-based ligand and sulfonates: proton conductivity and dye degradation studies

The MOFs were constructed by ligand AHP and sulfonate analogues. MOF4 exhibits a high proton conductivity of 1.95 × 10⁻³ S cm⁻¹ at 95 °C and 98% relative humidity. MOFs 1–5 also serve as photocatalysts for methylene blue degradation.

Co(II/III) Complexes with Benzoxazole and Benzothiazole Ligands as Efficient Heterogenous Photocatalysts for Organic Dyes Degradation

The problem of pollution in the current world is growing, however people’s awareness of environmental protection and ecology is also increasing. The aim of the study is to present three new Schiff base compounds with Co(II/III) ions and to assess their photocatalytic activity. The study was supported by cyclic voltammetry technique. In due course the complex 2 revealed as the most effective in AR18 degradation, even more than commercially available TiO2. The search for new photocatalysts able to decompose harmful organic dyes into environmentally friendly basic substances is becoming a new trend in the area of chemistry development.

Synthesis, structure and photocatalytic degradation of organic dyes of a copper(II) metal-organic framework (Cu-MOF) with a 4-coordinated three-dimensional CdSO4 topology

Metal-organic frameworks (MOFs) have attracted much interest in the fields of gas separation and storage, catalysis synthesis, nonlinear optics, sensors, luminescence, magnetism, photocatalysis gradation and crystal engineering because of their diverse properties and intriguing topologies. A Cu-MOF, namely poly[[(μ₂-succinato-κ²O:O'){μ₂-tris[4-(1,2,4-triazol-1-yl)phenyl]amine-κ²N:N'}copper(II)] dihydrate], {[Cu(C₄H₄O₄)(C₂₄H₁₈N₁₀)]·2H₂O}_n or {[Cu(suc)(ttpa)]·2H₂O}_n, (I), was synthesized by the hydrothermal method using tris[4-(1,2,4-triazol-1-yl)phenyl]amine (ttpa) and succinate (suc^2-), and characterized by IR, powder X-ray diffraction (PXRD), luminescence, optical band gap and valence band X-ray photoelectron spectroscopy (VB XPS). Cu-MOF (I) shows a twofold interpenetrating 4-coordinated three-dimensional CdSO₄ topology with point symbol {6⁵·8}. It presents good photocatalytic degradation of methylene blue (MB) and rhodamine B (RhB) under visible-light irradiation. A photocatalytic mechanism was proposed and confirmed.

Synthesis, structure, spectral characteristic and photocatalytic degradation of organic dyes of a copper metal-organic framework based on tri(triazole) and pimelate

A copper(II) metal-organic framework {[Cu(ttpa)(pim)]·H₂O}_n (1) was synthesized and characterized by EA, IR, X-ray powder diffraction, optical band gaps, VB XPS spectra and luminescence (ttpa = tris(4-(1,2,4-triazol-1-yl)phenyl)amine, pim = pimelate). 1 exhibits the 3D pcu topology containing the [Cu₂(COO)₄] dimer building block. E_g, E_v and E_c of 1 were 2.37, 1.64 and -0.73 eV, respectively. MOF 1 exhibits a highly photocatalytic efficiency for the degradation of methylene blue and rhodamine B by visible light irradiation. The photocatalyst 1 is very stable after photocatalytic experiment and can be reused for at least five times. The photocatalytic mechanism was detailedly assumed and confirmed by the photocatalytic reaction in the presence of the hydroxyl radical scavenger mannitol and trapping agent 1,4-benzenedicarbolic acid.