Dynamic Magnetic Properties of Germole-ligated Lanthanide Sandwich Complexes

Siddhartha De; Arpan Mondal; Ze-Yu Ruan; Ming-Liang Tong; Richard A Layfield

doi:10.1002/chem.202300567

Dynamic Magnetic Properties of Germole-ligated Lanthanide Sandwich Complexes

Chemistry. 2023 Jul 3;29(37):e202300567. doi: 10.1002/chem.202300567. Epub 2023 May 11.

Authors

Siddhartha De¹, Arpan Mondal¹, Ze-Yu Ruan², Ming-Liang Tong², Richard A Layfield¹

Affiliations

¹ Department of Chemistry School of Life Sciences, University of Sussex, Brighton, BN1 9QR, UK.
² Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of Education School of Chemistry, Sun-Yat Sen University, Guangzhou, 510006, P. R. China.

Abstract

The first germole-ligated single-molecule magnets are reported, with contrasting properties found for the near-linear sandwich complexes [(η⁸ -COT)Ln(η⁵ -Cp^Ge ]^- , where Ln=Dy (1_Dy ) or Er (1_Er ), COT is cyclo-octatetraenyl and Cp^Ge is [GeC₄ -2,5-(SiMe₃ )₂ -3,4-Me₂ ]^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.

Keywords: germole; hysteresis; lanthanides; sandwich complexes; single-molecule magnets.

Abstract

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