Related Experiment Video
Updated: Mar 25, 2026
09:38
Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies
Published on: January 3, 2018
7.6K
Single-molecule magnet behavior in 2,2'-bipyrimidine-bridged dilanthanide complexes
Wen Yu1, Frank Schramm1, Eufemio Moreno Pineda1
1Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany.
Beilstein Journal of Nanotechnology
|March 1, 2016
Summary
New dinuclear lanthanide complexes bridged by 2,2'-bipyrimidine exhibit single-molecule magnet (SMM) properties. The dysprosium(III) and erbium(III) complexes show distinct SMM characteristics, confirmed by micro-SQUID measurements.
Area of Science:
- Coordination Chemistry
- Materials Science
- Magnetism
Background:
- Lanthanide complexes are explored for unique magnetic properties.
- Single-molecule magnets (SMMs) offer potential for high-density data storage and quantum computing.
- Bridging ligands can influence the magnetic behavior of dinuclear metal complexes.
Purpose of the Study:
- Synthesize and characterize novel 2,2'-bipyrimidine-bridged dinuclear lanthanide complexes.
- Investigate the magnetic properties, including SMM behavior, of these complexes.
- Explore the film formation and surface properties of a terbium(III) complex on a gold surface.
Main Methods:
- Synthesis and characterization of five dinuclear lanthanide complexes: [Ln(tmhd)3]2bpm.
- Scanning tunneling microscopy (STM) to study film formation on Au(111).
- Comprehensive bulk magnetic property measurements and micro-SQUID measurements.
Main Results:
- Successful synthesis of [Ln(tmhd)3]2bpm complexes (Ln = Gd, Tb, Dy, Ho, Er).
- Formation of a homogeneous hexagonal film from [Tb(tmhd)3]2bpm on Au(111) observed via STM.
- Dynamic magnetic behavior indicating SMM characteristics for Dy(III) and Er(III) complexes with energy barriers of 97 K and 25 K, respectively.
- Micro-SQUID measurements confirmed SMM behavior and hysteresis loops in single crystals.
Conclusions:
- The synthesized dinuclear lanthanide complexes display promising single-molecule magnet properties.
- The dysprosium(III) and erbium(III) complexes are identified as potential SMMs.
- The study demonstrates the potential for thin film formation and surface characterization of these lanthanide complexes.
More Related Videos
07:24Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
Published on: April 14, 2020
18.9K
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.8K
Related Concept Videos
02:42Valence Bond Theory
11.6K
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...
11.6K
03:02Colors and Magnetism
14.5K
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...
14.5K
01:26Diamagnetism
3.3K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
3.3K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
49.5K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
49.5K
01:27π Electron Effects on Chemical Shift: Overview
1.9K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.9K
02:51Metal-Ligand Bonds
25.4K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
25.4K