A Redox-Active Bridging Ligand to Promote Spin Delocalization, High-Spin Complexes, and Magnetic Multi-Switchability

Xiaozhou Ma, Elizaveta A. Suturina, Siddhartha De, Philippe Négrier, Mathieu Rouzières, Rodolphe Clérac, Pierre Dechambenoit

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

A dinuclear CoII complex, [Co2(tphz)(tpy)2]n+ (n=4, 3 or 2; tphz: tetrapyridophenazine; tpy: terpyridine), has been assembled using the redox-active and strongly complexing tphz bridging ligand. The magnetic properties of this complex can be tuned from spin-crossover with T1/2≈470 K for the pristine compound (n=4) to single-molecule magnet with an ST=5/2 spin ground state when once reduced (n=3) to finally a diamagnetic species when twice reduced (n=2). The two successive and reversible reductions are concomitant with an increase of the spin delocalization within the complex, promoting remarkably large magnetic exchange couplings and high-spin species even at room temperature.

Original languageEnglish
Pages (from-to)7841-7845
Number of pages5
JournalAngewandte Chemie - International Edition
Volume57
Issue number26
Early online date30 Apr 2018
DOIs
Publication statusPublished - 25 Jun 2018

Keywords

  • molecular magnetism
  • multiswitchability
  • non-innocent ligands
  • radicals
  • spin delocalization

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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