Synthesis, structural characterization, DFT and molecular dynamics simulations of dinuclear (μ-hydroxo)-bridged triethanolamine copper(II) complexes: efficient candidates towards visible light-mediated photo-Fenton degradation of organic dyes.

Multinuclear (di/tri) copper(II) complexes bridged through hydroxyl groups are very interesting coordination complexes owing to their potential applications in various fields. In this work, three novel dinuclear (μ-hydroxo)-bridged copper(II) complexes in the crystal form, namely, [Cu(3,5-DIFLB)(H)](HO) (1), [Cu(4-ClB)(H)](HO) (2), and [Cu(4-ETHB)(H)](HO) (3) (where DIFLB = difluorobenzoate, CLB = chlorobenzoate, ETHB = ethoxybenzoate, and H = triethanolamine), were isolated at room temperature using methanol and water in a 4 : 1 v/v ratio as a solvent. Furthermore, all three complexes (1-3) were characterised using spectroscopic (UV-vis, DRS, and FT-IR), electrochemical (CV) and single-crystal X-ray diffraction techniques.

Anilato-Based Coordination Polymers with Slow Relaxation of the Magnetization: Role of the Synthetic Method and Anilato Ligand.

We have prepared and characterized three coordination polymers formulated as [Dy(COCl)(fma)] ⋅ 4.5fma (1) and [Dy(COX)(fma)] ⋅ 4fma ⋅ 2HO with X=Br (2) and Cl (3), where fma=formamide and COX =3,6-disubstituted-2,5-dihydroxy-1,4-benzoquinone dianion with X=Cl (chloranilato) and Br (bromanilato). Compounds 1 and 3 are solvates obtained with slow and fast precipitation methods, respectively.

The Versatility of Ethylene Glycol to Tune the Dimensionality and Magnetic Properties in Dy-Anilato-Based Single-Ion Magnets.

We exploit the high versatility of the solvent ethylene glycol (eg = CHOH-CHOH) acting as a ligand with three different coordination modes: terminal (κ), chelate (κ), and bridge (1κ,2κ) to prepare a novel family of six different coordination polymers with Dy and three different anilato ligands (3,6-disubstituted-2,5-dihydroxy-1,4-benzoquinone dianion = COX, with X = H, Cl, and Br). With the X = H derivative (dhbq), we have prepared [Dy(dhbq)(eg)(μ-eg)]·4eg·2HO (), a 3D diamond-like network with a chelate and bridging eg molecules. With the X = Cl derivative (chloranilato), we have prepared [Dy(COCl)(eg)]·2eg·HO () and [Dy(COCl)(μ-eg)(HO)]·2eg·7HO ().

A rare example of a double metamagnetic transition leading to 2D and 3D long-range order in the two-dimensional pyrazine- and azido-bridged cobalt(II) compound [Co(pyz)(N)].

The synthesis, characterization, crystal structure and detailed magnetic properties of a pyrazine (pyz) and azido (N) bridged cobalt(II) compound of formula [Co(N)(pyz)] (1) are reported. Compound 1 shows a layered structure formed by Co(II) chains with double μ-N(κN,N) bridges that are further connected by μ-(pyrazine-κN,N) bridges. The layers present weak van der Waals interactions between azido terminal groups.