Control of magnetic anisotropy by macrocyclic ligand distortion in a family of DyIIIand ErIIIsingle molecule magnets

Yolimar Gil, Pablo Fuentealba, Andrés Vega, Evgenia Spodine, Daniel Aravena

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A family of hexaazamacrocyclic lanthanide complexes, [Ln(Ln)(NCS)3] (LnIII = Dy, Er; n = 1-3) has been synthesized and characterized by single-crystal X-ray diffraction, magnetic measurements and ab initio calculations. Macrocyclic ligands (Ln) differ in the lateral spacers, which are aliphatic chains with two and three carbons (for Ln, n = 1 and 2, respectively), and an aromatic ring for Ln = 3. Modification of the macrocycle spacer tunes planarity and rigidity of the equatorial coordination for both oblate (Dy) and prolate (Er) lanthanide ions. Ac-susceptibility studies showed that four of the six complexes are field induced single molecule magnets (SMMs). Trends in magnetic relaxation properties are rationalized with the aid of ab initio multireference calculations, highlighting the combined influence of macrocycle planarity, lanthanide electronic density distribution and intermolecular interactions for the achievement of slow demagnetization. This journal is

Original languageEnglish
Pages (from-to)17709-17718
Number of pages10
JournalDalton Transactions
Volume49
Issue number48
DOIs
Publication statusPublished - 28 Dec 2020

ASJC Scopus subject areas

  • Inorganic Chemistry

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