From spin-crossover to single molecule magnetism: tuning magnetic properties of Co(ii) bis-ferrocenylterpy cations via supramolecular interactions with organocyanide radical anions

2020 ◽  
Vol 8 (24) ◽  
pp. 8135-8144
Author(s):  
Haomiao Xie ◽  
Kuduva R. Vignesh ◽  
Xuan Zhang ◽  
Kim R. Dunbar
Keyword(s):  
Magnetic Properties ◽  
Solid State ◽  
Single Molecule ◽  
Anion Radical ◽  
Spin Crossover ◽  
Supramolecular Interactions ◽  
Radical Anions ◽  
Fine Tune

TCNQ (7,7,8,8-tetracyanoquinodimethane) anion-radical derivatives were used to fine tune the magnetic properties of the [CoII(Fctp)2]2+ (Fctp = 4′-(2-ferrocenyl)-2,2′:6′2′′-terpyridine) cation in the solid state.

scholarly journals Influence of the supramolecular architecture on the magnetic properties of a DyIII single-molecule magnet: an ab initio investigation

2014 ◽  
Vol 5 ◽  
pp. 2267-2274 ◽  
Author(s):  
Julie Jung ◽  
Olivier Cador ◽  
Kevin Bernot ◽  
Fabrice Pointillart ◽  
Javier Luzon ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Magnetic Properties ◽  
Single Molecule ◽  
Ground State ◽  
Supramolecular Interactions ◽  
Supramolecular Organization ◽  
Supramolecular Architecture ◽  
Magnetic Ground State ◽  
Single Molecule Magnet ◽  
Hydrogen Bond Networks

Single-crystal angular-resolved magnetometry and wavefunction-based calculations have been used to reconsider the magnetic properties of a recently reported DyIII-based single-molecule magnet, namely [Dy(hfac)3(L1)] with hfac− = 1,1,1,5,5,5-hexafluoroacetylacetonate and L1 = 2-(4,5-bis(propylthio)-1,3-dithiol-2-ylidene)-6-(pyridin-2-yl)-5H-[1,3]dithiolo[4',5':4,5]benzo[1,2-d]imidazole. The magnetic susceptibility and magnetization at low temperature are found to be strongly influenced by supramolecular interactions. Moreover, taking into account the hydrogen-bond networks in the calculations allows to explain the orientation of the magnetic axes. This strongly suggests that hydrogen bonds play an important role in the modulation of the electrostatic environment around the DyIII center that governs the nature of its magnetic ground-state and the orientation of its anisotropy axes. We thus show here that SMM properties that rely on supramolecular organization may not be transferable into single-molecule devices.

scholarly journals Magnetism, Conductivity and Spin-Spin Interactions in Layered Hybrid Structure of Anionic Radicals [Ni(dmit)2] Alternated by Iron(III) Spin-Crossover Complex [Fe(III)(3-OMe-Sal2trien)] and Ferric Moiety Precursors

Molecules ◽  
2020 ◽  
Vol 25 (21) ◽  
pp. 4922
Author(s):  
Yuri N. Shvachko ◽  
Nataliya G. Spitsyna ◽  
Denis V. Starichenko ◽  
Vladimir N. Zverev ◽  
Leokadiya V. Zorina ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Anion Radical ◽  
Spin Crossover ◽  
Hybrid Structure ◽  
Two Dimensional ◽  
Cooperative Interactions ◽  
Spin Interactions ◽  
Ground Spin State ◽  
Spin Pairs ◽  
System 1

In this study, crystals of the hybrid layered structure, combined with Fe(III) Spin-Crossover (SCO) complexes with metal-dithiolate anionic radicals, and the precursors with nitrate and iodine counterions, are obtained and characterized. [Fe(III)(3-OMe-Sal2trien)][Ni(dmit)2] (1), [Fe(III)(3-OMe-Sal2trien)]NO3·H2O (2), [Fe(III)(3-OMe-Sal2trien)]I (3) (3-OMe-Sal2trien = hexadentate N4O2 Schiff base is the product of the condensation of triethylenetetramine with 3-methoxysalicylaldehyde; H2dmit = 2-thioxo-1,3-dithiole-4,5-dithiol). Bulk SCO transition was not achieved in the range 2.0–350 K for all three compounds. Alternatively, the hybrid system (1) exhibited irreversible segregation into the spatial fractions of Low-Spin (LS) and High-Spin (HS) phases of the ferric moiety, induced by thermal cycling. Fractioning was studied using both SQUID and EPR methods. Magnetic properties of the LS and HS phases were analyzed in the framework of cooperative interactions with anionic sublattice: Anion radical layers Ni(dmit)2 (1), and H-bonded chains with NO3 and I (2,3). LS phase of (1) exhibited unusual quasi-two-dimensional conductivity related to the Arrhenius mechanism in the anion radical layers, ρ||c = 2 × 105 Ohm·cm and ρ⊥c = 7 × 102 Ohm·cm at 293 K. Ground spin state of the insulating HS phase was distinctive by ferromagnetically coupled spin pairs of HS Fe3+, S = 5/2, and metal-dithiolate radicals, S = 1/2.

Solid State Structure, and Optical and Magnetic Properties, of Free Base Tetra(4-pyridyl)porphyrin {H2T(4-Py)P}•– Radical Anions

2018 ◽  
Vol 83 (4) ◽  
pp. 1861-1866 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Aleksey V. Kuzmin ◽  
Salavat S. Khasanov ◽  
Alexander F. Shestakov ◽  
Evgeniya I. Yudanova ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Solid State ◽  
Radical Anions ◽  
Free Base ◽  
State Structure ◽  
Solid State Structure ◽  
Optical And Magnetic Properties

scholarly journals Solvent and Anion Dependent Packing and Properties of Supramolecular Nanoballs

2014 ◽  
Vol 70 (a1) ◽  
pp. C1231-C1231
Author(s):  
Stuart Batten
Keyword(s):  
Carbon Dioxide ◽  
Magnetic Properties ◽  
Solid State ◽  
Physical Properties ◽  
Spin Crossover ◽  
Crystal Packing ◽  
Spin States ◽  
New Class ◽  
Magnetic Spin ◽  
Selective Catalysis

We have synthesised large (2.7 nm) spherical metallosupramolecules (`nanoballs') with interesting properties [1-3]. Metal ions can be varied with retention of overall structure and crystal packing. The molecular packing creates cavities within the solid state, and the crystals readily absorb solvents such as methanol, acetonitrile or acetone (which also changes the magnetic properties), and absorb significant amounts of hydrogen and carbon dioxide (but not methane), pointing to a new class of porous materials. Other properties include switching between two magnetic spin states (spin crossover) upon change in temperature or irradiation of light, and size-selective catalysis. New packing arrangements of the nanoballs can then be achieved through variation of the counteranions or nitrile solvent, leading to new phases with different physical properties.

Mononuclear lanthanide(iii)-oxamate complexes as new photoluminescent field-induced single-molecule magnets: solid-state photophysical and magnetic properties

2020 ◽  
Vol 49 (45) ◽  
pp. 16106-16124
Author(s):  
Raphael C. A. Vaz ◽  
Isabela O. Esteves ◽  
Willian X. C. Oliveira ◽  
João Honorato ◽  
Felipe T. Martins ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Solid State ◽  
Single Molecule ◽  
External Stimulus ◽  
Molecular Devices ◽  
Single Molecule Magnets

Lanthanide(iii)-oxamate complexes can switch into Light Conversion Molecular Devices (LCMDs) or field-induced Single-Molecule Magnets (SMMs) depending on the external stimulus.

Single Molecule Solid State Light Emitting Electrochemical Cells with Lifetimes Superior to 3000 Hours

2008 ◽  
Author(s):  
Henk Bolink ◽  
Rubén D. Costa ◽  
Enrique Orti ◽  
Michele Sessolo ◽  
Stefan Graber ◽  
...  
Keyword(s):  
Solid State ◽  
Single Molecule ◽  
Electrochemical Cells ◽  
Light Emitting

Double and triple pyridine-N-oxide bridged dinuclear Dysprosium(III) dimers and single-molecule magnetic properties

2019 ◽  
Vol 1175 ◽  
pp. 686-697 ◽  
Author(s):  
Ling Zhang ◽  
Hua Ma ◽  
Zhi-Qiang Wang ◽  
Yong-Mei Tian ◽  
Yi-Quan Zhang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Molecule

Single crystal to single crystal transformation of spin-crossover coordination polymers from 3D frameworks to 2D layers

2021 ◽  
Vol 9 (15) ◽  
pp. 5082-5087
Author(s):  
Yu Gong ◽  
Wang-Kang Han ◽  
Hui-Shu Lu ◽  
Qing-Tao Hu ◽  
Huan Tu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Crystal ◽  
Coordination Polymers ◽  
Ligand Exchange ◽  
Spin Crossover ◽  
Metal Organic Frameworks ◽  
Crystal Transformation ◽  
Metal Organic

New Hofmann-type metal–organic frameworks display rare and complete ligand exchange induced single crystal to single crystal transformations from 3D frameworks to 2D layers, accompanied by magnetic properties transition from two-step SCO behavior to hysteretic SCO behavior.

Magnetostructural relationships in [Ni(dmit)2] − radical anions

2021 ◽  
Author(s):  
Jhon Enrique Zapata Rivera ◽  
Carmen J. Calzado
Keyword(s):  
Magnetic Properties ◽  
Radical Anions ◽  
The Relationship

This work explores the relationship between the magnetic properties of salts based on the [Ni(dmit)2]− radicals and the different arrangement that these radicals can adopt in the crystals, induced by...

scholarly journals Solid‐State Near‐Infrared Circularly Polarized Luminescence from Chiral YbIII‐Single‐Molecule Magnet

2021 ◽  
Author(s):  
Fabrice Pointillart ◽  
Bertrand Lefeuvre ◽  
Carlo Andrea Mattei ◽  
Jessica Flores Gonzalez ◽  
Frédéric Gendron ◽  
...  
Keyword(s):  
Solid State ◽  
Single Molecule ◽  
Near Infrared ◽  
Circularly Polarized ◽  
Single Molecule Magnet ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence
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