Synthesis and Structural Study by Wide-Angle X-ray Scattering (WAXS) of Polymeric {Ln2[M(opba)]3}·S Compounds Containing 4f LnIII and 3d MII {Ln2[M(opba)]3}·S Ions [opba =ortho-Phenylenebis(oxamato), S = Solvent Molecules]

Abstract

The compounds of formula Ln2[M(opba)]3·xH2O·yDMSO containing 4f LnIII and 3d MII ions have been synthesized; opba stands for ortho‐phenylenebis(oxamato). These compounds crystallize poorly, and hence structural information has been obtained from the wide angle X‐ray scattering (WAXS) technique. It has been shown that the compounds present the same ladder‐like motif as that previously described for Tm2[Cu(opba)]3·4H2O·10DMF. Changing the LnIII and/or MII ions results in more or less pronounced distortions of the ladders. For a given MII ion, changing the LnIII ion from LaIII to LuIII results in a decrease of the Ln–M distance parallel to the lanthanide contraction. In the same way, for a given rare earth, changing the MII ion from CuII to NiII and ZnII ions also results in the decrease of the Ln–M distance in accord with the decreasing radii of the MII ions. The structural details have been analyzed and discussed.

Nature of the Interaction between LnIII and CuII Ions in the Ladder-Type Compounds {Ln2[Cu(opba)]3}·S (Ln = Lanthanide Element; opba = ortho-Phenylenebis(oxamato), S = Solvent Molecules)

“…In a preceding paper, it has been shown through WAXS (wide-angle X-ray scattering) experiments that the {Ln 2 [Cu(opba)] 3 }·S and {Ln 2 [Zn(opba)] 3 }·S compounds, hereafter abbreviated as Ln 2 Cu 3 and Ln 2 Zn 3 , respectively, have very similar structures . These structures consist of discrete, infinite ladder-type motifs as shown in Figure .…”

Synthesis and magnetic properties of copper(II)–lanthanide(III) heterobinuclear complexes with N,N′-bis[3-(dimethylamino)propyl]oxamido as ligand

“…Compared with the number of studies dealing with heteronuclear systems comprising d-transition-metal ions [5][6][7][8][9][10][11][12], relatively few studies dealing with heterometal complexes containing d-transition-metal ions and lanthanide(III) ions (so-called d-f heteronuclear complexes) have been reported, due to the very weak interaction and large anisotropic effect of lanthanide ions [2][3][4]. However, for two decades or so, much progress has also been made in the field of magnetic studies of d-f heteronuclear complexes [2][3][4][13][14][15][16]. The main reason is that the d-f mixed oxides have been used as a variety of functional materials and/or have been expected as promising functional materials, as well as special mechanism of magnetic interaction [17].…”

Bimetallic Magnets: Present and Perspectives

“…To extract information on the nature of the Ln III -Cu II interaction the magnetic behavior of Ln 2 {Cu(opba)} 3 can be compared with that of Ln 2 Zn(opba) 3 for each Ln III ion. Wide-angle X-ray scattering (WAXS) experiments strongly suggest that the Zn II -containing compounds have also a ladder-type structure [33]. For a Ln 2 Zn(opba) 3 compound in which the only magnetic ion is Ln III , the magnetic properties are entirely governed by the thermal population of the Stark components of Ln III .…”