Slow magnetic relaxation in a {EuCu5} metallacrown

Research output: Contribution to journalArticle

  • External authors:
  • Jin Wang
  • Ze-yu Ruan
  • Quan-wen Li
  • Yan-cong Chen
  • Guo-zhang Huang
  • Jun-liang Liu
  • Zhen-xing Wang
  • Ming-liang Tong


A 3d–4f heterometallic metallacrown with formula of [EuCu5(quinha)5(sal)2(py)5]CF3SO3·py·3H2O (1) (H2quinha = quinaldichydroxamic acid; Hsal = salicylaldehyde) has been synthesized. This complex shows field-induced slow magnetic relaxation via a Raman-like process, where studies of the isostructural {LuCu5} (2) and {YCu5} (3) complexes show that the slow dynamics mainly arise from the {Cu5} S = 1/2 ground state rather than the EuIII ion. However, the EuIII ion enhances the relaxation rates of the {Cu5} unit which likely arises from second-order effects in the formally diamagnetic 7F0 ground state of EuIII.

Bibliographical metadata

Original languageEnglish
Pages (from-to)1686-1692
JournalDalton Transactions
Issue number5
Early online date26 Dec 2018
Publication statusPublished - 2019