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Related Concept Videos

Electron Configuration of Multielectron Atoms03:26

Electron Configuration of Multielectron Atoms

The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
Electron Configurations02:46

Electron Configurations

Electron configurations and orbital diagrams can be determined by applying the Aufbau principle (each added electron occupies the subshell of lowest energy available), Pauli exclusion principle (no two electrons can have the same set of four quantum numbers), and Hund’s rule of maximum multiplicity (whenever possible, electrons retain unpaired spins in degenerate orbitals).
The relative energies of the subshells determine the order in which atomic orbitals are filled (1s, 2s, 2p, 3s, 3p, 4s,...
Valence Bond Theory02:42

Valence Bond Theory

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...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
The Aufbau Principle and Hund's Rule03:02

The Aufbau Principle and Hund's Rule

To determine the electron configuration for any particular atom, we can build the structures in the order of atomic numbers. Beginning with hydrogen, and continuing across the periods of the periodic table, we add one proton at a time to the nucleus and one electron to the proper subshell until we have described the electron configurations of all the elements. This procedure is called the aufbau principle, from the German word aufbau (“to build up”). Each added electron occupies the subshell of...
Electronic Structure of Atoms02:28

Electronic Structure of Atoms


An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum numbers:  n, l, ml, and...

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Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
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Published on: September 28, 2016

Electronic structure of Eu-C(70) fullerides.

Peng Wang1, Liang Meng, Xiao-Bo Wang

  • 1Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|March 12, 2011
PubMed
Summary
This summary is machine-generated.

Electronic structure of Europium-intercalated C(70) reveals charge transfer to C(70) orbitals at low levels. At high levels, Europium electrons form hybridized interstitial states, leading to semiconducting properties.

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Preparation and Characterization of C60/Graphene Hybrid Nanostructures
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Area of Science:

  • Materials Science
  • Solid State Physics
  • Quantum Chemistry

Background:

  • Fullerenes like C(70) exhibit unique electronic properties.
  • Intercalation of metals can significantly alter fullerene electronic structures.
  • Understanding these modifications is key to developing new materials.

Purpose of the Study:

  • To investigate the electronic structure of Europium-intercalated C(70) (Eu-C(70)).
  • To elucidate the charge transfer mechanisms and orbital hybridization.
  • To correlate electronic properties with potential ferromagnetic behavior.

Main Methods:

  • Synchrotron radiation photoemission spectroscopy (PES).
  • Analysis of electronic states and charge distribution.
  • Characterization of intercalation-induced states.

Main Results:

  • Charge transfer from Europium 6s states to C(70) LUMO and LUMO+1 observed at low intercalation.
  • Maximum charge transfer achieved before saturation.
  • Formation of Eu sub-lattice and 6s-π hybridized interstitial states at high intercalation (Eu(9)C(70)).
  • PES data indicate semiconducting properties for both Eu(3)C(70) and Eu(9)C(70).

Conclusions:

  • The electronic structure of Eu-C(70) is highly dependent on the intercalation level.
  • Hybridized interstitial states and semiconducting nature are significant findings.
  • These properties are crucial for understanding the ferromagnetic mechanism in Eu(9)C(70).