Jump to main content
Jump to site search

Issue 3, 2018
Previous Article Next Article

Metamagnetism with TN = 97 K in a layered assembly of paddlewheel [Ru2] units and TCNQ: an empirical rule for interlayer distances determining the magnetic ground state

Author affiliations

Abstract

A donor (D)/acceptor (A) assembly reaction of the paddlewheel-type diruthenium(II,II) complex [Ru2(m-ClPhCO2)4(THF)2] (m-ClPhCO2 = meta-chlorobenzoate; abbreviated hereafter as [Ru2]) with 2,5-dimethoxy-7,7,8,8-tetracyano-p-quinodimethane (TCNQ(MeO)2) in a dichloromethane (DCM)/1,1,2,2-tetrachloroethane (TCE) solvent system led to the formation of a two-dimensional layered D2A compound with crystallization solvents located between layers: [{Ru2(m-ClPhCO2)4}2{TCNQ(MeO)2}]·3.3DCM·2TCE (1). Compound 1 undergoes an intra-lattice one-electron transfer to form a charge-distributed state with the formula [{RuII,III2}+–TCNQ˙–{RuII,II2}] with intra-layer ferrimagnetic spin ordering through dπ*–pπ* orbital overlap that results in ferrimagnetic arrangement with antiferromagnetic interactions over heterospins of S = 1 for [RuII,II2] and S = 3/2 for [RuII,III2] via S = 1/2 for TCNQ˙. Consequently, because of the presence of interlayer antiferromagnetic interactions, 1 has an antiferromagnetic ground state with TN = 97 K. On applying a field of less than 0.5 T, a spin flip is induced, yielding a field-induced ferrimagnet (a type of metamagnet) with a large coercive field of 1.2 T at 1.8 K. Compound 1 has interlayer translational (i.e., interlayer [Ru2]⋯[Ru2] or TCNQ⋯TCNQ distance) (l2) and interlayer vertical (l1) distances of 10.30 and 9.82 Å, respectively. By comparison of the magnetostructural correlations of this type of layered magnet, this class of antiferromagnets, including 1, reveal a trend of having l2 ≤ 10.3 Å.

Graphical abstract: Metamagnetism with TN = 97 K in a layered assembly of paddlewheel [Ru2] units and TCNQ: an empirical rule for interlayer distances determining the magnetic ground state

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Nov 2017, accepted on 10 Jan 2018 and first published on 10 Jan 2018


Article type: Research Article
DOI: 10.1039/C7QM00534B
Citation: Mater. Chem. Front., 2018,2, 497-504
  •   Request permissions

    Metamagnetism with TN = 97 K in a layered assembly of paddlewheel [Ru2] units and TCNQ: an empirical rule for interlayer distances determining the magnetic ground state

    W. Kosaka, M. Itoh and H. Miyasaka, Mater. Chem. Front., 2018, 2, 497
    DOI: 10.1039/C7QM00534B

Search articles by author

Spotlight

Advertisements