Magnetic TTF-Based Charge-Transfer Complexes

Enoki, Toshiaki; Miyazaki, Akira

doi:10.1021/cr0306438

Cited by 319 publications

(173 citation statements)

References 143 publications

Supporting

Mentioning

170

Contrasting

Unclassified

Order By: Relevance

“…π-d molecular materials, i.e., systems where delocalized π-electrons of the organic donor are combined with localized d-electrons of magnetic counterions, have attracted major interest in molecular science since they can exhibit coexistence of two distinct physical properties, furnished by the two networks, or novel and improved properties due to the interactions established between them [127][128][129][130]. The development of these π-d systems as multifunctional materials represents one of the main targets in current materials science for their potential applications in molecular electronics [78,[127][128][129][130].…”

Section: Introductionmentioning

confidence: 99%

“…The development of these π-d systems as multifunctional materials represents one of the main targets in current materials science for their potential applications in molecular electronics [78,[127][128][129][130]. Important milestones in the field of magnetic molecular conductors have been achieved using as molecular building blocks the bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) organic donor [123,[131][132][133] or its selenium derivatives, and charge-compensating anions ranging from simple mononuclear complexes [MX 4 ] n− (M = Fe III , Cu II ; X = Cl, Br) [134][135][136] In these systems the shape of the anion and the arrangement of intermolecular contacts, especially H-bonding, between the anionic and cationic layers influence the packing motif of the BEDT-TTF radical cations, and therefore the physical properties of the obtained charge-transfer salt [141].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances on Anilato-Based Molecular Materials with Magnetic and/or Conducting Properties

et al. 2017

View full text Add to dashboard Cite

Abstract:The aim of the present work is to highlight the unique role of anilato-ligands, derivatives of the 2,5-dioxy-1,4-benzoquinone framework containing various substituents at the 3 and 6 positions (X = H, Cl, Br, I, CN, etc.), in engineering a great variety of new materials showing peculiar magnetic and/or conducting properties. Homoleptic anilato-based molecular building blocks and related materials will be discussed. Selected examples of such materials, spanning from graphene-related layered magnetic materials to intercalated supramolecular arrays, ferromagnetic 3D monometallic lanthanoid assemblies, multifunctional materials with coexistence of magnetic/conducting properties and/or chirality and multifunctional metal-organic frameworks (MOFs) will be discussed herein. The influence of (i) the electronic nature of the X substituents and (ii) intermolecular interactions i.e., H-Bonding, Halogen-Bonding, π-π stacking and dipolar interactions, on the physical properties of the resulting material will be also highlighted. A combined structural/physical properties analysis will be reported to provide an effective tool for designing novel anilate-based supramolecular architectures showing improved and/or novel physical properties. The role of the molecular approach in this context is pointed out as well, since it enables the chemical design of the molecular building blocks being suitable for self-assembly to form supramolecular structures with the desired interactions and physical properties.Keywords: benzoquinone derivatives; molecular magnetism; multifunctional molecular materials; spin-crossover materials; metal-organic frameworks General IntroductionThe aim of the present work is to highlight the key role of anilates in engineering new materials with new or improved magnetic and/or conducting properties and new technological applications. Only homoleptic anilato-based molecular building blocks and related materials will be discussed. Selected examples of para-/ferri-/ferro-magnetic, spin-crossover and conducting/magnetic multifunctional materials and MOFs based on transition metal complexes of anilato-derivatives, on varying the substituents at the 3,6 positions of the anilato moiety, will be discussed herein, whose structural features or physical properties are peculiar and/or unusual with respect to analogous compounds reported in the literature up to now. Their most appealing technological applications will be also reported.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Advances on Anilato-Based Molecular Materials with Magnetic and/or Conducting Properties

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The electrons coupled to localized spins have been a long studied issue from Kondo chains in heavy fermionic systems 1 , double exchange systems(DEX) in manganites 2 to π-d systems of molecular solids 3,4,5,6 . Particularly, the negative giant magnetoresistance effect in DEX system had been a highlight which provided a mechanism of tuning the electronic degrees of freedom by the magnetic field 2,7 .…”

Section: Introductionmentioning

confidence: 99%

Interplay of strongly correlated electrons and localized Ising moments in one dimension

Hotta

2010

Phys. Rev. B

View full text Add to dashboard Cite

We study the ground state properties of the one-dimensional quarter-filled strongly correlated electronic chain coupled by J to another chain of antiferromagnetic Ising moments. We focus on the case where the large Coulomb interactions localize the charges on every other site. Both the electronic spins and the Ising moments interact antiferromagnetically within each chain by J eff and J ′ , respectively. Since the number of electrons is half as that of the Ising moments the period of magnetic correlation of these two chains are incommensurate. In the presence of J, the frustration of J eff and J ′ arises, which may lead the system to the intriguing magneto-electric effect.

show abstract

“…A representative example involves the phase transition between the neutral (N:D 0 A 0 ) and ionic (I:D + A − ) charge states (i.e., N–I phase transition). This example represents a new research field in organic electron‐donor (D)–acceptor (A) systems,1, 2, 3, 4, 5, 6, 7, 8 with the discovery of the first compound tetrathiafulvalene–chloranil in the class of alternating π‐stacking DA systems by Torrance et al9, 10 However, these organic DA systems were of low interest from the viewpoint of spin systems because of the sole production of S = 1/2 antiferromagnetic pairs in the I‐state involving the structural distortion (i.e., dimerization). Conversely, a covalently bonded DA system exhibiting the N–I phase transition has been observed for a metal complex chain with the D and A of [Ru 2 (2,3,5,6‐F 4 PhCO 2 ) 4 ] and DMDCNQI, respectively, [Ru 2 (2,3,5,6‐F 4 PhCO 2 ) 4 DMDCNQI]·2( p ‐xylene) ( 0 , 2,3,5,6‐F 4 PhCO 2 − = 2,3,5,6‐tetrafluorobenzoate, DMDCNQI = 2,5‐dimethyl‐ N , N ′‐dicyanoquinonediimine) 11.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Sponge with Neutral–Ionic Phase Transitions

et al. 2017

View full text Add to dashboard Cite

Phase transitions caused by the charge instability between the neutral and ionic phases of compounds, i.e., N–I phase transitions, provide avenues for switching the intrinsic properties of compounds related to electron/spin correlation and dipole generation as well as charge distribution. However, it is extremely difficult to control the transition temperature (T c) for the N–I phase transition, and only chemical modification based on the original material have been investigated. Here, a design overview of the tuning of N–I phase transition by interstitial guest molecules is presented. This study reports a new chain coordination‐polymer [Ru2(3,4‐Cl2PhCO2)4TCNQ(EtO)2]∙DCE (1‐DCE; 3,4‐Cl2PhCO2 − = 3,4‐dichlorobenzoate; TCNQ(EtO)2 2,5‐diethoxy‐7,7,8,8‐tetracyanoquinodimethane; and DCE = 1,2‐dichloroethane) that exhibits a one‐step N–I transition at 230 K (= T c) with the N‐ and I‐states possessing a simple paramagnetic state and a ferrimagnetically correlated state for the high‐ and low‐temperature phases, respectively. The T c continuously decreases depending on the content of DCE, which eventually disappears with the complete evacuation of DCE, affording solvent‐free compound 1 with the N‐state in the entire temperature range (this behavior is reversible). This is an example of tuning the in situ T c for the N–I phase transition via the control of the interstitial guest molecules.

show abstract

Magnetic TTF-Based Charge-Transfer Complexes

Cited by 319 publications

References 143 publications

Recent Advances on Anilato-Based Molecular Materials with Magnetic and/or Conducting Properties

Recent Advances on Anilato-Based Molecular Materials with Magnetic and/or Conducting Properties

Interplay of strongly correlated electrons and localized Ising moments in one dimension

Magnetic Sponge with Neutral–Ionic Phase Transitions

Contact Info

Product

Resources

About