Single molecule magnet behavior observed in a 1-D dysprosium chain with quasi-D5h symmetry

Two one-dimensional coordination polymers with pentagonal bipyramidal DyIII centres show slow magnetic relaxation featuring single molecule magnet behavior.

Download Full-text

Counterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands

Magnetochemistry ◽

10.3390/magnetochemistry7110150 ◽

2021 ◽

Vol 7 (11) ◽

pp. 150

Author(s):

Carlo Andrea Mattei ◽

Bertrand Lefeuvre ◽

Vincent Dorcet ◽

Gilles Argouarch ◽

Olivier Cador ◽

...

Keyword(s):

Single Molecule ◽

Magnetic Relaxation ◽

Magnetic Measurements ◽

Solvent Mixture ◽

Zero Field ◽

Coordination Environment ◽

Single Molecule Magnet ◽

One Dimensional ◽

Slow Magnetic Relaxation ◽

Coordination Reaction

The coordination reaction of the [Dy(hfac)3(H2O)2] units (hfac− = 1,1,1,5,5,5-hexafluoroacetylacetonate) with the [8′-(Diphenoxylphosphinyl)[1,1′-binaphthalen]-8-yl]diphenoxylphosphine oxide ligand (L) followed by a crystallisation in a 1:3 CH2Cl2:n-hexane solvent mixture led to the isolation of a new polymorph of formula [(Dy(hfac)3((S)-L))3]n (1). The X-ray structure on single crystal of 1 revealed the formation of a mono-dimensional coordination polymer with three crystallographically independent DyIII centres, which crystallised in the polar chiral P21 space group. Ac magnetic measurements highlighted single-molecule magnet behaviour under both zero and 1000 Oe applied magnetic field with magnetic relaxation through quantum tunneling of the magnetisation (QTM, zero field only) and Raman processes. Despite the three crystallographically independent DyIII centres adopting a distorted D4d coordination environment, a single slow magnetic relaxation contribution was observed at a slower rate than its previously studied [(Dy(hfac)3((S)-L))]n (2) polymorph.

Download Full-text

Slow magnetic relaxation in dinuclear dysprosium and holmium phenoxide bridged complexes: a Dy2 single molecule magnet with a high energy barrier

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00152c ◽

2021 ◽

Author(s):

Matilde Fondo ◽

Julio Corredoira-Vázquez ◽

Ana M. Garcia-Deibe ◽

Jesus Sanmartin Matalobos ◽

Silvia Gómez-Coca ◽

...

Keyword(s):

Crystal Structures ◽

Single Molecule ◽

Energy Barrier ◽

Magnetic Relaxation ◽

High Energy ◽

Single Molecule Magnet ◽

High Energy Barrier ◽

Slow Magnetic Relaxation

Dinuclear [M(H3L1,2,4)]2 (M = Dy, Dy2; M = Ho, Ho2) complexes were isolated from an heptadentate aminophenol ligand. The crystal structures of Dy2·2THF, and the pyridine adducts Dy2·2Py and Ho2·2Py,...

Download Full-text

Polyoxometalate-Supported Lanthanoid Single-Molecule Magnets

Australian Journal of Chemistry ◽

10.1071/ch14166 ◽

2014 ◽

Vol 67 (11) ◽

pp. 1542 ◽

Cited By ~ 24

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].

Download Full-text

Structures, fluorescence properties and magnetic properties of a series of rhombus-shaped LnIII4 clusters: magnetocaloric effect and single-molecule-magnet behavior

New Journal of Chemistry ◽

10.1039/c9nj02872b ◽

2019 ◽

Vol 43 (33) ◽

pp. 12941-12949 ◽

Cited By ~ 19

Author(s):

Wen-Min Wang ◽

Li Zhang ◽

Xian-Zhen Li ◽

Li-Yuan He ◽

Xin-Xin Wang ◽

...

Keyword(s):

Magnetic Properties ◽

Magnetocaloric Effect ◽

Single Molecule ◽

Magnetic Relaxation ◽

Magnetic Refrigeration ◽

Fluorescence Properties ◽

Relaxation Processes ◽

Magnetic Studies ◽

Single Molecule Magnet ◽

Slow Magnetic Relaxation

A family LnIII4 clusters were successfully synthesized and structurally characterized. Magnetic studies show that Gd4 cluster displays magnetic refrigeration, while Dy4 cluster demonstrates two distinct slow magnetic relaxation processes.

Download Full-text

A mononuclear five-coordinate Co(ii) single molecule magnet with a spin crossover between the S = 1/2 and 3/2 states

Dalton Transactions ◽

10.1039/c8dt03783c ◽

2018 ◽

Vol 47 (46) ◽

pp. 16596-16602 ◽

Cited By ~ 16

Author(s):

Lei Chen ◽

Jingbo Song ◽

Wen Zhao ◽

Gangji Yi ◽

Zhikuan Zhou ◽

...

Keyword(s):

Hysteresis Loop ◽

Single Molecule ◽

Magnetic Relaxation ◽

Spin Crossover ◽

Spin Transition ◽

Single Molecule Magnet ◽

Pyramidal Geometry ◽

Mononuclear Cobalt ◽

Slow Magnetic Relaxation ◽

Square Pyramidal Geometry

A mononuclear cobalt(ii) complex with square pyramidal geometry displays a spin transition with a small hysteresis loop and slow magnetic relaxation.

Download Full-text

Zero-field slow magnetic relaxation in a uranium(iii) complex with a radical ligand

Chemical Communications ◽

10.1039/c4cc04486j ◽

2014 ◽

Vol 50 (71) ◽

pp. 10262-10264 ◽

Cited By ~ 21

Author(s):

Joana T. Coutinho ◽

Maria A. Antunes ◽

Laura C. J. Pereira ◽

Joaquim Marçalo ◽

Manuel Almeida

Keyword(s):

Single Molecule ◽

Magnetic Relaxation ◽

Zero Field ◽

Single Molecule Magnet ◽

Slow Magnetic Relaxation ◽

Bipyridine Ligand ◽

Radical Ligand

Single-molecule-magnet behaviour in [U(TpMe2)2(bipy˙)], a U(iii) complex with a radical bipyridine ligand, having magnetic contributions from both the metal and the ligand.

Download Full-text

Zero-field slow magnetic relaxation from single Co(ii) ion: a transition metal single-molecule magnet with high anisotropy barrier

Chemical Science ◽

10.1039/c3sc21893g ◽

2013 ◽

Vol 4 (4) ◽

pp. 1802 ◽

Cited By ~ 234

Author(s):

Yuan-Yuan Zhu ◽

Chang Cui ◽

Yi-Quan Zhang ◽

Jun-Hua Jia ◽

Xiao Guo ◽

...

Keyword(s):

Transition Metal ◽

Single Molecule ◽

Magnetic Relaxation ◽

Zero Field ◽

Single Molecule Magnet ◽

High Anisotropy ◽

Slow Magnetic Relaxation

Download Full-text

One-dimensional lanthanide coordination polymers supported by pentadentate Schiff-base and diphenyl phosphate ligands: single molecule magnet behavior and photoluminescence

New Journal of Chemistry ◽

10.1039/d0nj00533a ◽

2020 ◽

Vol 44 (18) ◽

pp. 7270-7276 ◽

Cited By ~ 1

Author(s):

Guo Peng ◽

Yue Chen ◽

Bo Li

Keyword(s):

Schiff Base ◽

Coordination Polymers ◽

Single Molecule ◽

Single Molecule Magnet ◽

One Dimensional ◽

Lanthanide Coordination Polymers ◽

Diphenyl Phosphate ◽

Phosphate Ligands

Four one-dimensional lanthanide coordination polymers constructed from Ln2 dimers showing single molecule magnet behavior and photoluminescence are reported.

Download Full-text