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Related Concept Videos

Metallic Solids02:37

Metallic Solids

20.5K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.5K
Properties of Transition Metals02:58

Properties of Transition Metals

29.6K
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.
29.6K
Bonding in Metals02:32

Bonding in Metals

52.1K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
52.1K
Alkali Metals03:06

Alkali Metals

24.2K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
24.2K
Colors and Magnetism03:02

Colors and Magnetism

14.0K
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...
14.0K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

24.0K
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...
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A semiconducting layered metal-organic framework magnet.

Chongqing Yang1,2, Renhao Dong3, Mao Wang4

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Organic Chemistry

Background:

  • The development of spintronic applications requires novel semiconducting materials with magnetic properties.
  • Metal-organic frameworks (MOFs) offer tunable structures and properties, making them promising candidates for advanced electronic applications.

Purpose of the Study:

  • To synthesize and characterize a novel semiconducting layered metal-organic framework (MOF) with spontaneous magnetization.
  • To investigate the magnetic and electronic properties of the synthesized MOF for potential spintronic applications.

Main Methods:

  • Synthesis of K3Fe2[PcFe-O8], a semiconducting layered MOF.
  • Time-resolved Terahertz spectroscopy to determine carrier mobility.
  • Magnetization experiments and 57Fe Mössbauer spectroscopy to probe magnetic properties.

Main Results:

  • The synthesized K3Fe2[PcFe-O8] exhibits spontaneous magnetization and semiconducting behavior.
  • Room temperature carrier mobility was measured at 15 ± 2 cm2V-1s-1.
  • Long-range magnetic correlations and magnetic hysteresis up to 350 K were observed, indicating potential for spintronics.

Conclusions:

  • The discovery of K3Fe2[PcFe-O8] demonstrates the feasibility of creating magnetic MOF semiconductors.
  • This material holds promise for the advancement of spintronic technologies.