Anisotropic exchange and temperature-dependent electron paramagnetic resonance line width in one-dimensional copper(II) complexes. 2. Magnetic properties of copper(II) oxalate-1/3-water

A Chloro‐Bridged Linear Chain Imine‐Copper(II) Complex and Its Application as an Enzyme‐Free Amperometric Biosensor for Hydrogen Peroxide

“…The EPR spectrum at 126 K showed a narrowing of the line and better resolution of the hyperfine structure [see Figure 2 (a) which is characteristic of axial symmetry with g ⟂ = 2.116 and g ∥ = 2.483]. This narrowing probably comes from an electronic exchange between the paramagnetic centres which has the effect of averaging interactions, such as hyperfine and magnetic dipole, something which usually leads to line broadening but that can also lead to a narrowing of the lines as observed in this work 26…”

The crystal structure of paramagnetic copper(ii) oxalate (CuC2O4): formation and thermal decomposition of randomly stacked anisotropic nano-sized crystallites

“…Similar large constant paramagnetic contributions have been found in earlier studies and appear to be intrinsic. 20 Neutron scattering measurements of the excitation spectrum combined with detailed model work would be quite valuable to resolve this question. Thus, CuC 2 O 4 is an interesting compound that may add new aspects to our understanding of one-dimensional frustrated magnetic systems.…”

“…[18][19][20] The magnetic susceptibility in the temperature range 100 to 350 K showed a broad maximum at 260 K that was suggested to result from linear chains of interacting antiferromagnetically coupled Cu(II)-dimers. In the present work, the magnetic susceptibility of copper(II) oxalate (sample 2) was measured by vibrating sample magnetometry (VSM) in the temperature range 2 to 300 K and a magnetic field of 0.537 T (5.37 kG) using a cryogenic free measurement system (CFMS) from CRYGENIC Ltd.…”

“…Early magnetic studies of copper(II) oxalate revealed a weak magnetic response. [18][19][20] The magnetic susceptibility in the temperature range 100 to 350 K showed a broad maximum at 260 K that was suggested to result from linear chains of interacting antiferromagnetically coupled Cu(II)-dimers. Similar quasi-one-dimensional spin chain structures have been observed in Na 3 Cu 2 S b O 6 , [21][22][23] Cu 5 SbO 6 , 24 LiCuSbO 4 25 and in CuCl 2 .…”

Linear polymers containing transition metals in the main chain

“…The smaller analogues, (13) and (14), have proved to be too small to give polymers, and formed dimers such as structure (11) iz).…”