Related Experiment Video
Updated: Jul 19, 2026

13:58
Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
Published on: September 28, 2016
Characterization of Ce@C82 and its anion
Takatsugu Wakahara1, Jun-ichi Kobayashi, Michio Yamada
1Center for Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
Journal of the American Chemical Society
|April 15, 2004
Summary
Researchers isolated cerium fullerene (Ce@C82) using HPLC and analyzed its anion
Area of Science:
- Supramolecular Chemistry
- Organometallic Chemistry
- Nanotechnology
Background:
- Fullerenes are carbon cage molecules with unique electronic properties.
- Endohedral fullerenes encapsulate atoms within the carbon cage, modifying their characteristics.
- Cerium endohedral fullerenes are of interest due to cerium's f-electron behavior.
Purpose of the Study:
- To isolate and characterize cerium endohedral fullerene (Ce@C82).
- To investigate the electronic structure and stability of Ce@C82 and its anion.
- To explore the relationship between NMR and ESR spectroscopy in characterizing these systems.
Main Methods:
- High-performance liquid chromatography (HPLC) for isolation.
- (13)Carbon Nuclear Magnetic Resonance ((13)C NMR) spectroscopy for structural and electronic analysis.
- Electron Spin Resonance (ESR) spectroscopy to probe magnetic properties.
Main Results:
- Ce@C82 was successfully isolated and its cage symmetry determined as C(2)(v).
- (13)C NMR spectra of the anion [Ce@C82](-) exhibited temperature-dependent shifts attributed to the cerium f-electron.
- Both Ce@C82 and [Ce@C82](-) were ESR silent due to anisotropic g-matrix and fast relaxation.
- [Ce@C82](-) showed lower air stability compared to [La@C82](-).
Conclusions:
- The study provides insights into the electronic structure of Ce@C82 through NMR spectroscopy.
- The ESR silence of Ce@C82 and its anion is explained by specific electronic and magnetic properties.
- The comparative stability highlights differences in endohedral metal-fullerene interactions.
Related Concept Videos
Electron Behavior
Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.Electrons Orbit the NucleusElectrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus...
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...
Lewis Symbols and the Octet Rule
Chemical bonds are complex interactions between two or more atoms or ions, which reduce the potential energy of the molecule. Gilbert N. Lewis developed a model called the Lewis model that simplified the depiction of chemical bond formation and provided straightforward explanations for the chemical bonds seen in most common compounds.
Ionic Bonding and Electron Transfer
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
Predicting Molecular Geometry
VSEPR Theory for Determination of Electron Pair Geometries
Electron Behavior
Electrons are negatively charged subatomic particles attracted to and orbit around the positively-charged nucleus of an atom. They reside in spaces associated with energy levels called shells and are further organized into subshells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...

