Wydział Chemii

Teresa Kurc

Veneta Videnova-Adrabińska

Ilona Turowska-Tyrk

Marek Duczmal

Maria Jerzykiewicz

2013

Journal of Molecular Structure

1054-1055

134-142

10.1016/j.molstruc.2013.08.059

Naukowa

Angielski

Artykuł

A new Cu(II) complex, [Cu₂(μ₂-OH₂)₂(HSIP)₂(H₂O)₆] (H₃SIP = 5-sulfoisophthalic acid), has been synthesized and characterized by single crystal X-ray diffraction, EPR spectroscopy (X- (9.5 GHz) and Q-band (35 GHz)) and magnetic measurements. The solid state structure of the complex consists of coordination dimers [Cu₂(μ₂-OH₂)₂(HSIP)₂(H₂O)₆] which are hydrogen bonded into 3D network. The neighbouring metal ions form a rare example of centrosymetric dinuclear core [Cu₂(μ₂-OH₂)₂] with equatorial – axial positions of the bridging ligands. The coordination dimers are organized into inorganic monolayers via water–sulfonate hydrogen bond intractions, and further linked in 3D structure via carboxylic–carboxylic hydrogen bond intractions. The magnetic properties and EPR spectra are discussed in terms of crystal structure features. The X- and Q-band EPR spectra exhibit fine structure signals due to S = 1 and the simulated parameters indicate small zero field splitting parameter D_exp (−0.035 cm⁻¹) dominated by D_dip (−0.031 cm⁻¹). A usually forbidden ΔM_s = 2 line of lower intensity is observed in the half field region at about 150 mT. The susceptibility data have been analyzed using a spin–ladder model with both ferromagnetic (rungs) and antiferromagnetic (legs) coupling.

Copper(I) complex, crystal structure, hydrogen-bonded network, EPR Spectra, magnetic properties

http://dx.doi.org/10.1016/j.molstruc.2013.08.059

http://www.elsevier.com