Influence of the coordination environment on slow magnetic relaxation and photoluminescence behavior in two mononuclear dysprosium(iii) based single molecule magnets

2015 ◽  
Vol 44 (11) ◽  
pp. 5086-5094 ◽  
Author(s):  
Amit Kumar Mondal ◽  
Soumyabrata Goswami ◽  
Sanjit Konar
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Local Symmetry ◽  
Quantum Yields ◽  
Slight Variation ◽  
Single Molecule Magnets ◽  
Coordination Environment ◽  
Photoluminescence Study ◽  
Slow Magnetic Relaxation ◽  
Photoluminescence Behavior

Two luminescent mononuclear Dy(iii) based complexes with SMM behaviour have been reported. The SMM behaviours differ due to the slight variation of local symmetry around the Dy(iii) centers and photoluminescence study showed quantum yields of 0.98 and 1.44%.

Cu(ii)–Dy(iii) and Co(iii)–Dy(iii) based single molecule magnets with multiple slow magnetic relaxation processes in the Cu(ii)–Dy(iii) complex

2015 ◽  
Vol 44 (29) ◽  
pp. 13242-13249 ◽  
Author(s):  
Malay Dolai ◽  
Mahammad Ali ◽  
Ján Titiš ◽  
Roman Boča
Keyword(s):  
Schiff Base ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Magnetic Relaxation ◽  
Magnetic Behaviour ◽  
Dinuclear Complexes ◽  
Relaxation Processes ◽  
Single Molecule Magnets ◽  
Slow Magnetic Relaxation

Two CuII–DyIII and CoIII–DyIII dinuclear complexes of a Schiff base ligand (H3L) exhibit single-molecule magnetic behaviour with multiple slow magnetic relaxation processes for the former.

Structural anisotropy of cyanido-bridged {CoII9WV6} single-molecule magnets induced by bidentate ligands: towards the rational enhancement of an energy barrier

2016 ◽  
Vol 52 (26) ◽  
pp. 4772-4775 ◽  
Author(s):  
Szymon Chorazy ◽  
Michał Rams ◽  
Anna Hoczek ◽  
Bernard Czarnecki ◽  
Barbara Sieklucka ◽  
...  
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Bidentate Ligands ◽  
Single Molecule Magnets ◽  
Structural Anisotropy ◽  
Slow Magnetic Relaxation

{CoII9[WV(CN)8]6} clusters capped by odd and even number of bidentate ligands reveal the improved slow magnetic relaxation due to the significant structural anisotropy.

Strictly linear trinuclear Dy–Ca/Mg–Dy single-molecule magnets: the impact of long-range f–f ferromagnetic interactions on suppressing quantum tunnelling of magnetization leading to slow magnetic relaxation

2017 ◽  
Vol 46 (25) ◽  
pp. 8259-8268 ◽  
Author(s):  
Wan-Ying Zhang ◽  
Yong-Mei Tian ◽  
Hong-Feng Li ◽  
Peng Chen ◽  
Yi-Quan Zhang ◽  
...  
Keyword(s):  
Long Range ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Single Molecule Magnets ◽  
Quantum Tunnelling ◽  
Trinuclear Complexes ◽  
Slow Magnetic Relaxation ◽  
Ferromagnetic Interactions ◽  
The Impact

A series of linear trinuclear complexes Ln2M(OQ)8 [Ln(iii) = Dy and Er, M(ii) = Ca and Mg] were structurally and magnetically investigated.

Polyoxometalate-Supported Lanthanoid Single-Molecule Magnets

2014 ◽  
Vol 67 (11) ◽  
pp. 1542 ◽  
Author(s):  
Michele Vonci ◽  
Colette Boskovic
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Donor Ligands ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Coordination Numbers ◽  
Oxygen Donor ◽  
Slow Magnetic Relaxation

Polyoxometalates are robust and versatile multidentate oxygen-donor ligands, eminently suitable for coordination to trivalent lanthanoid ions. To date, 10 very different structural families of such complexes have been found to exhibit slow magnetic relaxation due to single-molecule magnet (SMM) behaviour associated with the lanthanoid ions. These families encompass complexes with between one and four of the later lanthanoid ions: Tb, Dy, Ho, Er, and Yb. The lanthanoid coordination numbers vary between six and eleven and a range of coordination geometries are evident. The highest energy barrier to magnetisation reversal measured to date for a lanthanoid–polyoxometalate SMM is Ueff/kB = 73 K for the heterodinuclear Dy–Eu compound (Bu4N)8H4[DyEu(OH)2(γ-SiW10O36)2].

Magnetic field and dilution effects on the slow relaxation of {Er3} triangle-based arsenotungstate single-molecule magnets

2020 ◽  
Vol 49 (35) ◽  
pp. 12458-12465 ◽  
Author(s):  
Hanhan Chen ◽  
Lin Sun ◽  
Jinpeng Zhang ◽  
Zikang Xiao ◽  
Pengtao Ma ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Slow Relaxation ◽  
Relaxation Processes ◽  
Single Molecule Magnets ◽  
Thermally Activated ◽  
Slow Magnetic Relaxation ◽  
Dilution Effects

Triangular {Er3} cluster containing POM exhibits field-induced two thermally activated relaxation processes. Whereas, the diamagnetic dilution sample indicates slow magnetic relaxation with the QTM being partially suppressed.

Humidity driven molecular switch based on photoluminescent DyIIICoIII single-molecule magnets

2019 ◽  
Vol 7 (14) ◽  
pp. 4164-4172 ◽  
Author(s):  
Szymon Chorazy ◽  
Jakub J. Zakrzewski ◽  
Mateusz Reczyński ◽  
Koji Nakabayashi ◽  
Shin-ichi Ohkoshi ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Room Temperature ◽  
Functional Materials ◽  
Molecular Switch ◽  
Dehydration Process ◽  
Single Molecule Magnets ◽  
Visible Photoluminescence ◽  
Slow Magnetic Relaxation

Functional materials incorporating cyanido-bridged DyIIICoIII molecules combine visible photoluminescence and slow magnetic relaxation, both switchable by the level of humidity within the reversible room temperature dehydration process.

scholarly journals Improved slow magnetic relaxation in optically pure helicene-based DyIII single molecule magnets

2016 ◽  
Vol 52 (100) ◽  
pp. 14474-14477 ◽  
Author(s):  
J.-K. Ou-Yang ◽  
N. Saleh ◽  
G. Fernandez Garcia ◽  
L. Norel ◽  
F. Pointillart ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Single Molecule Magnets ◽  
Slow Magnetic Relaxation ◽  
Optically Pure

Racemic and optically pure [Dy(hfac)3(L)] complexes with L = 3-(2-pyridyl)-4-aza[6]-helicene have been synthesized and characterized.

Modulation of slow magnetic relaxation by tuning magnetic exchange in {Cr2Dy2} single molecule magnets

2014 ◽  
Vol 5 (8) ◽  
pp. 3246-3256 ◽  
Author(s):  
Stuart K. Langley ◽  
Daniel P. Wielechowski ◽  
Veacheslav Vieru ◽  
Nicholas F. Chilton ◽  
Boujemaa Moubaraki ◽  
...  
Keyword(s):  
Exchange Interaction ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Single Molecule Magnets ◽  
Magnetic Exchange Interaction ◽  
Magnetic Exchange ◽  
Slow Magnetic Relaxation

Newly synthesised {CrIII2DyIII2} single molecule magnets reveal that the size of the anisotropy barrier is related to the strength of the magnetic exchange interaction in the complex.

Slow magnetic relaxation of light lanthanide-based linear LnZn2 trinuclear complexes

2015 ◽  
Vol 44 (41) ◽  
pp. 18276-18283 ◽  
Author(s):  
Chika Takehara ◽  
Poh Ling Then ◽  
Yumiko Kataoka ◽  
Motohiro Nakano ◽  
Tomoo Yamamura ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Lanthanide Ions ◽  
Single Molecule Magnets ◽  
Trinuclear Complexes ◽  
Light Lanthanide ◽  
Slow Magnetic Relaxation

Four isostructural Zn(ii)–Ln(iii)–Zn(ii) trinuclear complexes were synthesized using light lanthanide ions as magnetic centers, of which Ce(iii) and Nd(iii) complexes behaved as single-molecule magnets.

Slow magnetic relaxation and luminescence properties in neodymium(iii)-4,4,4-trifluoro-1-(2-naphthyl)butane-1,3-dionato complexes incorporating bipyridyl ligands

2021 ◽  
Author(s):  
Ramon Vicente ◽  
Ànnia Tubau ◽  
Saskia Speed ◽  
Franz A. Mautner ◽  
Florian Bierbaumer ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Luminescence Properties ◽  
Molecular Materials ◽  
Single Molecule Magnets ◽  
Pyridyl Ligands ◽  
Slow Magnetic Relaxation

A new series of eight-coordinated Nd(iii) complexes derived from 4,4,4-trifluoro-1-(naphthalen-2-yl)butane-1,3-dionate and bi-pyridyl ligands revealed multifunctional molecular materials as photoluminescent single-molecule magnets (SMMs).

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