Dynamic Magnetic Properties of Germole‐ligated Lanthanide Sandwich Complexes
Siddhartha De, Arpan Mondal, Ze‐Yu Ruan, Ming‐Liang Tong, Richard A. Layfield
Abstract
Abstract The first germole‐ligated single‐molecule magnets are reported, with contrasting properties found for the near‐linear sandwich complexes [(η 8 ‐COT)Ln(η 5 ‐Cp Ge ] − , where Ln=Dy ( 1 Dy ) or Er ( 1 Er ), COT is cyclo‐octatetraenyl and Cp Ge is [GeC 4 ‐2,5‐(SiMe 3 ) 2 ‐3,4‐Me 2 ] 2− . Whereas 1 Er has an energy barrier of 120(1) cm −1 in zero applied field and open hysteresis loops up to 10 K, the relaxation in 1 Dy is characterized by quantum tunneling within the ground state.
Topics & Concepts
LanthanideMaterials scienceChemistryOrganic chemistryIonMagnetism in coordination complexesLanthanide and Transition Metal ComplexesPolyoxometalates: Synthesis and Applications