Triangulo-{ErIII 3} complex showing field supported slow magnetic relaxation
Mamo Gebrezgiabher1,2, Sören Schlittenhardt3, Cyril Rajnák2
1Department of Industrial Chemistry, College of Applied Sciences, Nanotechnology Excellence Center, Addis Ababa Science and Technology University Addis Ababa P.O. Box 16417 Ethiopia madhu.thomas@aastu.edu.et.
RSC Advances
|August 17, 2022
Summary
A novel triangular erbium(III) complex, [Er3Cl(o-van)3(OH)2(H2O)5]Cl3·9.4H2O, was synthesized. This complex exhibits slow magnetic relaxation, indicating potential applications in molecular magnetism.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Magnetochemistry
Background:
- Lanthanide complexes are of interest for their unique magnetic properties.
- Tuning the coordination environment of lanthanide ions can influence their magnetic behavior.
Purpose of the Study:
- To synthesize and characterize a novel triangular erbium(III) complex.
- To investigate the magnetic properties of the synthesized complex.
Main Methods:
- In situ synthesis method.
- Elemental analysis and molecular spectroscopy for characterization.
- Single crystal X-ray diffraction for structural determination.
- AC susceptibility measurements for magnetic studies.
Main Results:
- The formation of a trinuclear erbium(III) complex with a triangular arrangement of Er(III) ions was confirmed.
- The structure features bridging o-vanillinate and hydroxide ligands, along with aqua and chloride ligands.
- AC susceptibility measurements revealed slow magnetic relaxation with two distinct relaxation modes.
Conclusions:
- The synthesized erbium(III) complex possesses a unique triangular structure.
- The compound displays slow magnetic relaxation, characteristic of single-molecule magnet behavior.
More Related Videos
08:55Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
8.6K
07:24Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins
Published on: September 23, 2021
1.9K
Related Concept Videos
01:23Atomic Nuclei: Nuclear Relaxation Processes
710
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis.
710
03:02Colors and Magnetism
12.3K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.3K
01:28Atomic Nuclei: Types of Nuclear Relaxation
369
Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
369
01:31Ferromagnetism
2.5K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.5K
02:42Valence Bond Theory
9.1K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
9.1K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.1K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.1K