Slow Magnetic Relaxation in a Palladium–Gadolinium Complex Induced by Electron Density Donation from the Palladium Ion

David C. Izuogu, Takefumi Yoshida, Haitao Zhang, Goulven Cosquer, Keiichi Katoh, Shuhei Ogata, Miki Hasegawa, Hiroyuki Nojiri, Marko Damjanović, Wolfgang Wernsdorfer, Tomoya Uruga, Toshiaki Ina, Brian K. Breedlove, Masahiro Yamashita

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Incorporating palladium in the first coordination sphere of acetato-bridged lanthanoid complexes, [Pd2Ln2(H2O)2(AcO)10]⋅2 AcOH (Ln=Gd (1), Y (2), Gd0.4Y1.6 (3), Eu (4)), led to significant bonding interactions between the palladium and the lanthanoid ions, which were demonstrated by experimental and theoretical methods. We found that electron density was donated from the d8 Pd2+ ion to Gd3+ ion in 1 and 3, leading to the observed slow magnetic relaxation by using local orbital locator (LOL) and X-ray absorption near-edge structure (XANES) analysis. Field-induced dual slow magnetic relaxation was observed for 1 up to 20 K. Complex 3 and frozen aqueous and acetonitrile solutions of 1 showed only one relaxation peak, which confirms the role of intermolecular dipolar interactions in slowing the magnetic relaxation of 1. The slow magnetic relaxation occurred through a combination of Orbach and Direct processes with the highest pre-exponential factor (τo=0.06 s) reported so far for a gadolinium complex exhibiting slow magnetic relaxation. The results revealed that transition metal–lanthanoid (TM–Ln) axial interactions indeed could lead to new physical properties by affecting both the electronic and magnetic states of the compounds.

Original languageEnglish
Pages (from-to)9285-9294
Number of pages10
JournalChemistry - A European Journal
Volume24
Issue number37
DOIs
Publication statusPublished - 2018 Jul 2

Keywords

  • computational techniques
  • electron density donation
  • electron-deficient
  • gadolinium
  • heterometallic
  • magnetism
  • metal–metal interactions
  • quantum dots
  • spectroscopic methods

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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