Related Experiment Video
Updated: May 23, 2025
12:20
Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
Published on: October 5, 2013
14.6K
Synthesis, Structural Characterization, and Magnetic Properties of Two New Fe(III)Mn(III) 1D Bimetallic Compounds.
Abdelwahab Hassan1,2, Eslam Hemida3, Nada I Mahmoud1
1Physics Department, Faculty of Science, Fayoum University, Fayoum 63514, Egypt.
ACS Omega
|March 10, 2025
Summary
New bimetallic compounds with iron (Fe) and manganese (Mn) exhibit ferromagnetic coupling. Their one-dimensional zigzag chain structures form even in the presence of methanol, challenging previous assumptions.
Area of Science:
- Coordination Chemistry
- Materials Science
- Magnetochemistry
Background:
- Bimetallic compounds featuring iron (Fe) and manganese (Mn) are of interest for their magnetic properties.
- The assembly of metal-organic frameworks often involves specific building blocks and reaction conditions.
- Previous studies suggested that methanol (MeOH) hinders the formation of one-dimensional (1D) chain structures in similar systems.
Purpose of the Study:
- To synthesize and characterize two new Fe(III)Mn(III) bimetallic compounds.
- To investigate the magnetic properties and structural characteristics of these novel compounds.
- To explore the influence of solvent, specifically methanol, on the formation of 1D chain structures.
Main Methods:
- Synthesis of two Fe(III)Mn(III) bimetallic compounds using a tricyanometalate building block and Mn Schiff base precursors.
- Structural characterization using X-ray crystallography to determine the 1D zigzag chain motif.
- Magnetic susceptibility measurements to analyze the magnetic coupling between Fe(III) and Mn(III) centers.
Main Results:
- Two 1D zigzag chain compounds, [Tp*Fe(CN)3][(MnIIIsalen)]·MeOH·MeCN (1) and [Tp*Fe(CN)3][MnIIIsalphen]·MeOH·H2O (2), were successfully synthesized.
- Both compounds exhibit ferromagnetic coupling between Fe(III) and Mn(III) centers, indicated by positive Curie-Weiss constants (+1.1 K for 1, +1.0 K for 2).
- Ferromagnetic interactions are linked to significantly bent Mn-NC angles within the cyanide bridges.
Conclusions:
- The formation of 1D chains in the presence of methanol challenges prior research, indicating a broader range of viable reaction conditions.
- The study highlights the sensitivity of these reaction systems to factors like solvent properties, precursor characteristics, and reaction parameters.
- These findings contribute to understanding the factors governing the self-assembly of magnetic coordination polymers.
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
8.4K
10:45Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
Published on: February 5, 2022
4.2K
Related Concept Videos
03:02Colors and Magnetism
11.5K
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...
11.5K
02:42Valence Bond Theory
8.4K
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...
8.4K
02:34Structural Isomerism
19.1K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.1K
01:31Ferromagnetism
2.4K
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...
2.4K
01:26Diamagnetism
2.4K
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....
2.4K
02:58Properties of Transition Metals
24.8K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
24.8K