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Related Concept Videos

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

19.3K
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...
19.3K
Metallic Solids02:37

Metallic Solids

16.4K
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...
16.4K
Colors and Magnetism03:02

Colors and Magnetism

12.1K
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...
12.1K
Valence Bond Theory02:42

Valence Bond Theory

8.9K
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...
8.9K
Bonding in Metals02:32

Bonding in Metals

45.5K
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”. 
45.5K
Properties of Transition Metals02:58

Properties of Transition Metals

28.2K
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.
28.2K

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Related Experiment Video

Updated: May 1, 2026

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

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Metallicity in fullerides.

Katalin Kamarás1, Gyöngyi Klupp

  • 1Research Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary. kamaras.katalin@wigner.mta.hu.

Dalton Transactions (Cambridge, England : 2003)
|April 8, 2014
PubMed
Summary

Fullerene-based metallic salts exhibit unique superconducting properties. Spectroscopic methods reveal exotic metallic and superconducting phases, including Mott transitions, in these molecular crystals.

Area of Science:

  • Solid-state physics
  • Materials science
  • Chemistry

Background:

  • Fullerene-based metallic salts were initially recognized for conventional superconductivity.
  • Recent advancements reveal exotic metallic and superconducting phases in these materials.
  • The proximity to Mott transitions influences their electronic behavior.

Purpose of the Study:

  • To review prior findings on unconventional metallic fulleride phases.
  • To discuss newly discovered expanded fulleride superconductors.
  • To highlight the utility of spectroscopic methods in studying these materials.

Main Methods:

  • Focus on infrared and optical spectroscopy.
  • Utilize molecular spectroscopic methods for analysis.
  • Investigate phase transitions in molecular crystals.

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Co-localizing Kelvin Probe Force Microscopy with Other Microscopies and Spectroscopies: Selected Applications in Corrosion Characterization of Alloys
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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Main Results:

  • Fulleride superconductors display unconventional metallic and superconducting properties.
  • Spectroscopy effectively tracks metallicity and phase transitions.
  • Mott transitions are crucial in understanding these molecular crystals.

Conclusions:

  • Fullerene metallic salts present complex electronic behaviors beyond conventional superconductivity.
  • Spectroscopic techniques are essential for characterizing their exotic phases.
  • Further research into fulleride superconductors is warranted.