EPR, Mössbauer and magnetic studies of coordination polymers of type [CuxFey(dedb)·2H2O]n (dedb = dianion of 2,5-dichloro-3,6-bis (ethylamino)-1,4-benzoquinone) (x = 0–1, y = 0–1)

• Cu(II) doped Fe(III) coordination polymers have been prepared and characterized.
• Mössbauer studies reveals presence of high spin Fe(III) with traces of Fe(II).
• EPR studies corroborates the Mössbauer results for the presence of Fe(III).
• Antiferromagnetic Cu-polymer while ferromagnetic Cu-doped iron polymers.
• Mixed metal polymers exhibit higher conductivity than pure metal polymers.

Spectroscopic studies of newly synthesized coordination polymers of the type [CuxFey(dedb)·2H2O]n {where dedb = dianion of 2,5-dichloro-3,6-bis(ethylamino)-1,4-benzoquinone (1); x = 1, y = 0 (2); 0, 0.67 (3); 0.5, 0.33 (4); 0.25, 0.5 (5); 0.125, 0.583 (6); 0.0625, 0.625 (7) and n = degree of polymerization} have been carried out by IR, Mössbauer and electron paramagnetic resonance (EPR) spectroscopic techniques. Powder X-ray diffraction studies reveal the crystalline nature of the polymers. Mössbauer and EPR spectroscopic studies and variable temperature susceptibility measurements indicate the presence of high spin Fe(III) (S = 5/2) in the polymers. A rare coexistence of ferromagnetism and electrical conductivity observed is discussed under present communication.

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