Recent developments in single-molecule toroics

Li, Xiao-Lei; Tang, Jinkui

doi:10.1039/c9dt02113b

Cited by 49 publications

(30 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[215] Singlemolecule toroics have since become ad istinct line of research with potentially interesting applications. [216,217] This arrangement of local magnetizationsi sj ust one among many possible ones. Local magnetizationsm ay acquire ar adial relative orientation, while still remaining in the trianglep lane like in Na 11 [{Er(OH 2 )} 3 CO 3 (PW 9 O 34 ) 2 ].…”

Section: The Next Generation:ising-spin Trianglesmentioning

confidence: 99%

See 1 more Smart Citation

Half‐Integer Spin Triangles: Old Dogs, New Tricks

Boudalis

2021

Chemistry A European J

View full text Add to dashboard Cite

Spin triangles, that is, triangularc omplexes of halfinteger spins,a re the oldest molecular nanomagnets (MNMs). Their magnetic properties have been studied long before molecular magnetism was delineated as ar esearch field. This Review presentst he history of their study,w ith references to the parallel developmento fn ew experimental investigations andn ew theoretical ideas used for their interpretation. It then presents an indicative list of spin-triangle familiest oi llustrate their chemical diversity.F inally,i tm akes reference to recent developments in terms of theoretical ideas and new phenomena, as well as to the relevance of spin triangles to spintronic devices and new physics.

show abstract

Section: The Next Generation:ising-spin Trianglesmentioning

confidence: 99%

“…It is interesting to note that a Dy 3 SMM was shown to exhibit a 470 K paraelectric–ferroelectric transition, although this order was not related to the spin degree of freedom of the complex [215] . Single‐molecule toroics have since become a distinct line of research with potentially interesting applications [216, 217] …”

Section: New Tricksmentioning

confidence: 99%

Half‐Integer Spin Triangles: Old Dogs, New Tricks

Boudalis

2021

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…The χ M T value (18.71 cm 3 K mol À 1 ) of 2 at 300 K is obviously larger than that (16.17 cm 3 K mol À 1 ) expected for one isolated Dy(III) ion in 6 H 15/2 multiplet ground state with two isolated Ni(II) ions (S = 1, g = 2). [47] Lowering the temperature, the χ M T value of complex 2 undergoes a slow increase to reach 19.03 cm 3 K mol À 1 at 18 K, then an abrupt increase to a value of 24.19 cm 3 K mol À 1 at 2 K. All of these features confirm the presence of dominant ferromagnetic interaction in 2, which is supported by the small bond angles of Ni-OÀ Ni (85.6(2) and 88.9(2)°) and Ni-OÀ Dy (89.3(2)-93.9(2)°) facile for ferromagnetic interactions. [48,49] The χ m À 1 -T curves of 1 and 2 were fitted based on the Curie-Weiss law χ m = C/(TÀ θ), which gave the Curie constants C = 14.94 and 18.55 cm 3 K mol À 1 , and the Weiss constants θ = À 4.31 and 1.00 K for 1 and 2, respectively.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Structure and Magnetic Properties of Two Discrete 3d‐4f Heterometallic Complexes

Yang

Quan

et al. 2020

ChemistrySelect

View full text Add to dashboard Cite

Two discrete 3d–4f heterometallic complexes [CoIIIDyIII(CH3CN)0.5(L1)3(NO3)3] (1) and [Ni2IIDyIII(EtOH)(L2)4(NO3)2Cl] ⋅ CH3CN (2) were obtained from the reactions of 8‐hydroxyquinoline (HL1) or 2‐methyl‐8‐hydroxyquinoline (HL2) with their corresponding metal salts. Complex 1 presents a dinuclear structure with the Dy(III) and Co(II) ions linked by three phenolic oxygen atoms from three (L1)− ligands. Complex 2 presents a triangular trinuclear structure with the two Ni(II) ions and one Dy(III) ion consolidated by one chloride ligand and four phenolic oxygen atoms from four (L2)− ligands. Their χMT versus T plots show different profiles with obvious ferromagnetic interactions between the metal ions in 2. Both complexes exhibit slow magnetic relaxation behaviours, but with obvious different features. It revealed a cooperatively regulating effect of ligand and transition metal ions on the structures and magnetic properties.

show abstract

“…The magnetoelectric coupling is a secondary ferroic effect, which is inherent * tvr@jlu.edu.cn to toroidic order. It is of special interest in applications [21]. The occurrence of multiple ferroic properties in one phase is related to specific symmetry conditions a material has to accomplish.…”

Section: Introductionmentioning

confidence: 99%

Toroidic and antitoroidic orders in hexagonal arrays of dielectric trimers: magnetic group approach

Dmitriev,

Santos,

Evlyukhin

et al. 2021

Preprint

View full text Add to dashboard Cite

Herein, we investigate symmetry-protected toroidal dipole resonances and conditions of their excitation in a new type of electromagnetic metamaterials. These metamaterials are all-dielectric planar periodic arrays of dielectric disks disposed on a dielectric substrate. The elementary building blocks of the array are trimers which are distributed in hexagonal unit supercells. The highest geometrical symmetry of the unit supercell is C6v. The analysis is fulfilled by using the representation theory of groups with application of the magnetic group theory, which is a new approach in solving such problems. We have shown that to get access to the toroidal supermodes of the array, symmetry of the unit supercell must be broken twice: firstly, the C3v symmetry of the trimer, and secondly, the C6v symmetry of the unit supercell needs to be reduced. Selection rules for the symmetric and antisymmetric orders of the toroidal dipole moments in the arrays are defined. In particular, we have shown that with the reduction of the unit supercell symmetry to the C2v group, the array exhibits the toroidal dipole resonance with antitoroidic order. The arrays with the lower Cs symmetry can provide the resonances with both toroidic and antitoroidic orders. It is also shown that these arrays are always polarization sensitive. Full-wave simulations and experiments confirm the theoretical predictions. The suggested metamaterials can provide an enhanced light-matter interaction due to the spatially and temporally confined light in resonant systems with very high quality factors.

show abstract

Recent developments in single-molecule toroics

Abstract: An update overview of emerging single-molecule toroics (SMTs) is expounded to elucidate the strategy to design SMTs and ultimately inspire the seeking of SMTs with enhanced toroidal moment.

Cited by 49 publications

References 58 publications

Half‐Integer Spin Triangles: Old Dogs, New Tricks

Half‐Integer Spin Triangles: Old Dogs, New Tricks

Structure and Magnetic Properties of Two Discrete 3d‐4f Heterometallic Complexes

Toroidic and antitoroidic orders in hexagonal arrays of dielectric trimers: magnetic group approach

Contact Info

Product

Resources

About