Triply halogen-bridged erbium compounds with hard single-molecule magnet behavior.

ABSTRACT: Single-molecule magnets (SMMs) show promise for high-density data storage due to molecular-level magnetic hysteresis, but low-temperature quantum tunneling of magnetization (QTM) limits their blocking temperatures (T_B), making QTM suppression critical. Herein, we report two dinuclear Er-cyclooctatetraenyl compounds: [K(18-C-6)(THF)][(COT^1,4TMS2)Er(μ-Cl)₃Er(COT^1,4TMS2)] (1) and [K(18-C-6)(THF)₂][(COT^1,3TMS2)Er(μ-Br)₃Er(COT^1,3TMS2)] (2) (COT^1,4TMS2 and COT^1,3TMS2 donate 1,4- and 1,3-bis(trimethylsilyl)-substituted cyclooctatetraenyl ligands, respectively; 18-C-6 = 18-Crown-6 ether). In both compounds, the two Er(III) ions are triply bridged by Cl^- (1) or Br^- (2). Ab initio calculations confirm

SUBMITTER: Chen QW 

PROVIDER: S-EPMC12808664 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature