Fullerene C60
chemical name
Fullerene C60
ingredients / composition information
Purity: 95%, 98%, 99%. 99.5%, 99.9%
CAS No.: 99685-96-8
Molecular formula: C60
Molecular weight: 720.67
Color and traits: black powder with weak fluorescence
Introduction and application of three fullerenes
Fullerene introduction
Fullerene is a carbon allotrope. Any substance composed of one element of carbon and present in a spherical, elliptical, or tubular structure may be referred to as fullerenes. Fullerenes are similar in structure to graphite, but there are only six-membered rings in the structure of graphite, and five-membered rings may exist in fullerenes. In 1985, Robert Curl et al. prepared C60. In 1989, experiments by German scientists Huffman and Kraetschmer confirmed the cage structure of C60. From then on, the fullerene discovered by physicists was pushed to a new stage of research by the scientific community. The structure of fullerenes is similar to that of the architect Fuller, so it is called fullerene. As a prominent representative of the fullerene family, the C60 molecule is a spherical 32-faced body formed by connecting 60 carbon atoms with 20 six-membered rings and 12 five-membered rings. It is very close to the structure of football, and its unique structure and singular properties. Concerned by scientists from various countries. So far, C60 research has covered many fields of disciplines and applied research in energy, laser, superconductor and ferromagnet, life science, materials science, polymer science, catalysis, etc., and has increasingly shown great potential and important research. Value and application value.
Fullerenes and applications
Fullerene has been widely used in daily cosmetics due to its excellent free radical trapping, light absorption, superconducting semiconductor, perfect structure, DNA affinity, electron acceptor, high-efficiency adsorption, embedded molecules and other characteristics (or functions). , pharmaceutical intermediates, rubber / film material modifiers, high-tech energy, composite additives and many other fields.
Four fullerene characteristics
C60 is a purple-red solid molecular crystal at room temperature with weak fluorescence. The C60 molecule has a diameter of about 7.1 angstroms (1 angstrom = 10-10 meters, i.e., one billionth of a meter), and the C60 has a density of 1.68 g/cm3. Molecular orbital calculations show that footballene has a large delocalization energy. C60 has metallic luster and has many excellent properties, such as superconductivity, strong magnetism, high pressure resistance, chemical corrosion resistance, and potential application prospects in the fields of light, electricity and magnetism.
Solubility
Fullerenes are poorly soluble in most solvents and are usually dissolved in an aromatic solvent such as toluene, chlorobenzene, or a non-aromatic solvent, carbon disulfide. The solution of pure fullerene is usually purple, the concentration is purple red, the solution of C70 is slightly redder than C60, because other absorption is at 500nm; other fullerenes, such as C76, C80, etc. are different. purple. Fullerenes are allotropes of carbon found to date in a solvent dissolved in a conventional solvent at room temperature.
Some fullerenes are insoluble because their ground and excited states have narrow bandwidths, such as C28, C36 and C50. C72 is also almost insoluble, but the inlaid fullerenes of C72, such as La2.C72, are soluble due to the interaction of metal elements with fullerenes. Early scientific scientists were puzzled by the lack of C72, but C72 embedded in fullerenes. The narrow bandwidth of fullerene is highly active and often combines with other fullerenes. The solubility of the chemically modified fullerene derivative is much enhanced. For example, the solubility of PC61BM in chlorobenzene at room temperature is 50 mg/mL. The solubility of C60 and C70 in some solvents is listed in the left table, where the solubility is usually an estimate of the saturation concentration.
Conductivity
C60 is not conductive under normal conditions. Because C60 is too large to put other atoms into it and affect its physical properties, it is not conductive. In addition, since C60 has a large amount of free electrons, if a radioactive element capable of beta decay is trapped inside, its half-life may be affected.
Superconductivity
Many properties were discovered after mass production of C60. Soon, Haddon et al. found that alkali-doped C60 has metallic behavior. In 1991, it was found that potassium-doped C60 has superconducting behavior at 18K, which is the highest molecular hitherto. The superconducting temperature, followed by the superconducting properties of a large amount of metal-doped fullerenes was found.

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