Two families of Ln(III)-V(IV) compounds (Ln(III) = Eu, Tb, Dy, Ho) of different structural types mediated by Rb+ and Cs+ cations: Slow magnetic relaxation of Eu(III)- and Ho(III)-containing members

The structure-directing role of alkali metal ions (Rb+, Cs+) made it possible to obtain two series of heterometallic compounds built from trinuclear {LnIIIVIV2} units (LnIII = Eu, Tb, Dy, Ho), namely, 3D polymers and octanuclear complexes. The EuIII- and HoIII-containing representatives of these series demonstrated field-induced slow relaxation of magnetization.