scholarly journals The Underexplored Field of Lanthanide Complexes with Helicene Ligands: Towards Chiral Lanthanide Single Molecule Magnets

2021 ◽  
Vol 7 (10) ◽  
pp. 138
Author(s):  
Gabriela Handzlik ◽  
Katarzyna Rzepka ◽  
Dawid Pinkowicz
Keyword(s):  
Transition Metal Complexes ◽  
Single Molecule ◽  
Specific Rotation ◽  
Crystalline Material ◽  
Lanthanide Ions ◽  
Single Molecule Magnets ◽  
Design And Synthesis ◽  
Chiral Carbon ◽  
Effective Combination ◽  
Recent Developments

The effective combination of chirality and magnetism in a single crystalline material can lead to fascinating cross-effects, such as magneto–chiral dichroism. Among a large variety of chiral ligands utilized in the design and synthesis of chiral magnetic materials, helicenes seem to be the most appealing ones, due to the exceptionally high specific rotation values that reach thousands of deg×cm3×g−1×dm−1, which is two orders of magnitude higher than for compounds with chiral carbon atoms. Despite the sizeable family of transition metal complexes with helicene-type ligands, there are only a few examples of such complexes with lanthanide ions. In this mini-review, we describe the most recent developments in the field of lanthanide-based complexes with helicene-type ligands and summarize insights regarding the further exploration of this family of compounds towards multifunctional chiral lanthanide single molecule magnets (Ln-SMMs).

Dalton technical issue “Lanthanide and transition metal complexes as molecular magnets Single-molecule magnets within polyoxometalate-based frameworks

2021 ◽  
Author(s):  
Malihe Babaei Zarch ◽  
Masoud Mirzaei ◽  
Maryam Bazargan ◽  
Sandeep K Gupta ◽  
Franc Meyer ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Single Molecule ◽  
Molecular Magnets ◽  
Technical Issue ◽  
Hydrothermal Conditions ◽  
Single Molecule Magnets ◽  
Design And Synthesis

As an extension of our interest in polyoxometalates (POMs) and lanthanoids, we report the design and synthesis of two polyoxometalate-based frameworks under hydrothermal conditions; [Ho4(PDA)4(H2O)11][(SiO4)@W12O36]·8H2O (1) and [Tb4(PDA)4(H2O)12][(SiO4)@W12O36]·4H2O (2) (H2PDA...

Recent advances in lanthanide coordination polymers and clusters with magnetocaloric effect or single-molecule magnet behavior

2021 ◽  
Author(s):  
Jun-Jie Hu ◽  
Yan Peng ◽  
Sui-Jun Liu ◽  
He-Rui Wen
Keyword(s):  
Quantum Computing ◽  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Coordination Polymers ◽  
Single Molecule ◽  
Information Storage ◽  
Lanthanide Ions ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Lanthanide Coordination Polymers

The molecular magnetorefrigerant materials for low-temperature magnetic refrigeration and single-molecule magnets for high-density information storage and quantum computing have received extensive attention from chemists and magnetic experts. Lanthanide ions with...

Structural variations in (CuL)2Ln complexes of a series of lanthanide ions with a salen-type unsymmetrical Schiff base(H2L): Dy and Tb derivatives as potential single-molecule magnets

2017 ◽  
Vol 46 (36) ◽  
pp. 12095-12105 ◽  
Author(s):  
Prithwish Mahapatra ◽  
Soumavo Ghosh ◽  
Naoki Koizumi ◽  
Takuya Kanetomo ◽  
Takayuki Ishida ◽  
...  
Keyword(s):  
Schiff Base ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Lanthanide Ions ◽  
Structural Variations ◽  
Single Molecule Magnets ◽  
Unsymmetrical Schiff Base

Five heterometallic Cu2Ln complexes (Ln = Gd, Tb, Dy, Ho and Er) have been synthesized using asymmetric Schiff base ligand. Among these, Cu2Tb and Cu2Dy complexes show field induced SMM behaviour.

Lanthanide single molecule magnets: progress and perspective

2015 ◽  
Vol 44 (9) ◽  
pp. 3923-3929 ◽  
Author(s):  
Peng Zhang ◽  
Li Zhang ◽  
Jinkui Tang
Keyword(s):  
Single Molecule ◽  
Single Molecule Magnets ◽  
Recent Developments

The recent developments in lanthanide SMMs highlighted in this frontier article indicate the directions to which further synthetic efforts should be focused.

scholarly journals High-Spin Cobalt(II) Complex with Record-Breaking Anisotropy of the Magnetic Susceptibility According to Paramagnetic NMR Spectroscopy Data

2021 ◽  
Vol 47 (1) ◽  
pp. 10-16
Author(s):  
Ya. A. Pankratova ◽  
Yu. V. Nelyubina ◽  
V. V. Novikov ◽  
A. A. Pavlov
Keyword(s):  
Magnetic Susceptibility ◽  
Nmr Spectroscopy ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Single Molecule ◽  
Functional Materials ◽  
Medical Diagnostics ◽  
Paramagnetic Nmr ◽  
Single Molecule Magnets

Abstract The tetrahedral cobalt(II) complex [CoL2](HNEt3)2 (I), where L is 1,2-bis(methanesulfonamido)benzene, exhibiting the properties of a single-molecule magnet is synthesized and characterized. The electronic structure parameters of complex I are determined by paramagnetic NMR spectroscopy. They completely reproduce the results of less available methods of studying single-molecule magnets. The value of axial anisotropy of the magnetic susceptibility estimated for complex I (Δχax = 34.5 × 10–32 m3 at 20°C) is record-breaking among all transition metal complexes studied by the NMR method, which provides wide possibilities for the use of complex I as a paramagnetic label for structural biology or as a contrast agent and even a temperature sensor for medical diagnostics. The data obtained indicate the advantages of paramagnetic NMR spectroscopy as a method of investigation of the magnetic properties and electronic structures of highly anisotropic transition metal complexes, which are precursors of many functional materials.

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.

Recent Developments in Lanthanide Single-Molecule Magnets

2017 ◽  
Vol 12 (21) ◽  
pp. 2772-2779 ◽  
Author(s):  
Jingjing Lu ◽  
Mei Guo ◽  
Jinkui Tang
Keyword(s):  
Single Molecule ◽  
Single Molecule Magnets ◽  
Recent Developments

scholarly journals Organometallic Single-Ion Magnets

2014 ◽  
Vol 70 (a1) ◽  
pp. C274-C274
Author(s):  
Bing-Wu Wang ◽  
Zhe-Ming Wang ◽  
Song Gao
Keyword(s):  
Single Molecule ◽  
Basic Research ◽  
Information Storage ◽  
Tunneling Effect ◽  
Single Molecule Magnets ◽  
Magnetization Relaxation ◽  
Molecular Nanomagnets ◽  
Design And Synthesis ◽  
Potential Applications ◽  
Slow Magnetic Relaxation

The single-molecule magnets (SMMs) are attracting the increasing interesting due to their potential applications in high density information storage, quantum computing, molecular spintronics, and magnetic refrigeration. This field provides scientists a possible access into the crossover of the classical and quantum world, and a wonderful model to study the fascinating magnetic properties between microscopic and macroscopic materials, such as slow magnetization relaxation and quantum tunneling effect. After the milestone discovery of the first single-molecule magnets (SMMs) Mn12ac, many new SMMs were structurally and magnetically characterized. The most studied systems are mainly traditional coordination compounds with polynuclear structures. However, for the difficulties in the control of magnetic anisotropy and exchange coupling interactions of the cluster-type molecules, Mn12ac molecule is still one of the most important SMMs with the high relaxation barrier. From 2011 [1-3], we explored an organometallic sandwich molecule, Cp*ErCOT(Cp* = pentamethylcyclopenta-dienide; COT = cyclooctatetraenide), which behaves as a single-ion magnets, into the field of molecular nanomagnets. It opened a door of SMMs to the chemists in organometallic chemistry. Recently, we found some new sandwich or half-sandwich lanthanide organometallic molecules could also show the slow relaxation of magnetization. We hope these systems can provide new understandings of slow magnetic relaxation and new clues on the design and synthesis of molecular nanomagnets. This work was supported by NSFC, the National Basic Research Program of China.

Sign in / Sign up

Export Citation Format

Share Document