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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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Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
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Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
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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.
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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”. 
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Another big discovery-metallofullerenes.

Hisanori Shinohara1

  • 1Department of Chemistry and Institute for Advanced Research, Nagoya University, Nagoya 464-8602, Japan noris@nagoya-u.jp.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|August 10, 2016
PubMed
Summary
This summary is machine-generated.

Researchers explore metallofullerenes, such as lanthanum encapsulated in C60 (La@C60), detailing their properties and synthesis. A key finding is the crucial role of a bottom-up growth mechanism in creating these complex molecules.

Keywords:
fullerenesgrowth mechanismmetallofullerenesnon-IPR

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Area of Science:

  • Fullerene chemistry
  • Materials science
  • Nanotechnology

Background:

  • The discovery of Buckminster Fullerene (C60) in 1985 revealed 'magic number' clusters.
  • Early observations included lanthanum encapsulated in C60 (La@C60) in mass spectra.
  • Advancements in synthesis and purification have spurred research into metallofullerenes.

Purpose of the Study:

  • To elucidate the structural, electronic, magnetic, and transport properties of metallofullerenes.
  • To investigate the formation mechanisms of various metallofullerene structures.
  • To contribute to the understanding of fullerene chemistry and applications.

Main Methods:

  • Laser vaporization of lanthanum chloride-impregnated graphite.
  • Mass spectrometry for cluster beam analysis.
  • Separation and purification techniques for metallofullerenes.

Main Results:

  • Experimental evidence for 'magic number' features in La@C60.
  • Rapid development in understanding metallofullerene properties.
  • Demonstration of a bottom-up closed network growth mechanism.

Conclusions:

  • Metallofullerenes possess diverse and tunable properties.
  • The bottom-up growth mechanism is critical for metallofullerene synthesis.
  • Continued research promises advancements in fullerene science and applications.