Heterometallic pentanuclear coordination compounds [Ln 3+ 4Cu 2+] involving light lanthanide ions, Ce, Pr, Nd, Sm, and Eu, were synthesized and structurally characterized. The exchange interactions between the Ln and Cu ions were evaluated by high-frequency electron paramagnetic resonance and magnetization studies, clarifying the presence of ferromagnetic exchange couplings in Nd-Cu (J Nd-Cu/k B = +0.30(6) K) and Sm-Cu (J Sm-Cu/k B = +2.08(3) K), very small couplings in Ce-Cu and Pr-Cu, and the absence in Eu-Cu. A significant chemical trend is found in the order of the atomic number.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry