Fullerenes - C60/C70 mixture (Contains 20% C70 and 1% higher fullerenes)

Fullerenes - C60/C70 mixture (Contains 20% C70 and 1% higher fullerenes)（CAS 99685-96-8）：分子式 C60、分子量 720.6；类别 有机化学品。

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用途与场景

登记用途：Uses: Carbon molecules structured as fullerenes containing 12 pentagons and 'm' hexagons、[Merck Index] Used as high-performance polymer films、transistors、lubricants、anticorrosion coatings、organic photoconductors、and energy cells、[HSDB]、C60 fullerene is an insulator but exhibits electrical conductivity when doped with electropositive metals.、Solid fullerenes are compressible because of the weak van der Waals forces between the fullerene molecules in the lattice. Various high-pressure phases of C60 and C70 have been characterized. When compressed to 70 percent of its original size、C60 becomes more than twice as hard as diamond. Thus、it could be applied as a shock absorber for high-energy collision or for reinforcing metals or plastics. Cross-linked polymers and high-performance polymer films can be obtained by cross-linking C60 with resins. These materials are very hard and thermally extremely stable.、In C60-polymer composites、fast photo induced electron transfer occurs from the polymer to the C60 molecule and photoconductivity is observed. The efficiency of organic photoconductors could be improved by addition of C60. This discovery may lead to applications in xerography、laser printers、fax machines.、The possibility of using C60 for hydrogen storage might be useful not only in energy storage cells but also in high-energy-density primary batteries.、For more Uses (Complete) data for FULLERENES (8 total)、please visit the HSDB record page.、Synthetic Polymer MALDI Matrix Compounds、Methods of Manufacturing: Fullerene Synthesis by Combustion. ... Premixed laminar benzene-oxygen-argon flames operated at different pressures、temperatures、and carbon to oxygen ratios have been used. Besides fullerenes and soot、polyaromatic hydrocarbons are formed. The yield of fullerenes and the C70、C60 ratio strongly depend on the operating mode. The yield of C60 and C70 is in the range of 0.003-9% of the soot mass. Expressed as percentage of fuel carbon、the yields vary from 2X10-4 to 0.3%. The C70、C60 ratio varies over the range 0.26 to 5.7、which is much larger than that observed for graphite-vaporization methods (0.02-0.18). This ratio tends to increase with increasing pressure.、Fullerenes can also be obtained by pyrolysis of naphthalene at 1000 °C in an argon stream. The naphthalene skeleton is a monomer of the C60 structure. The fullerenes are formed by dehydrogenative coupling reactions. Primary reaction products are polynaphthyls with up to seven naphthalene moieties. Full dehydrogenation leads to both C60 and C70 in yields less than 0.5%. Hydrofullerenes such as C60H36 have been observed as side products.、The resistive heating of graphite was the first method for producing macroscopic quantities of fullerenes. The apparatus first used ... for the production of C60 was a bell jar connected to a pump and gas inlet. In the jar two graphite rods - one sharpened to a conical point and the other with a flat end - are kept in contact by a spring. The apparatus is evacuated、filled with helium at 14 kPa、and an electric current passed through the rods. This heats the point of contact to 2500 - 3000 °C and forms a black smoke、which condenses on the bell jar and a smoke catcher. The fullerenes are extracted from the soot with toluene in a yield of 10-15%. The HUFFMAN-KRATSCHMER process has been patented、and the first computer-controlled、fully automated fullerene production systems are commercially available.、Arc vaporization of graphite: ... The tips of two sharpened graphite rods are kept at contact-arcing distance、so that the electric power is dissipated in an electric arc rather than in ohmic heating. This method allows efficient evaporation of carbon、the yield of fullerenes is about 15%. The disadvantage of this method is the intense UV radiation originating from the arc plasma. The absorption of UV light by fullerenes produces a triplet state T1 with a lifetime of a few microseconds. In the T1 state、the fullerene is an open-shell system that can readily react with other carbon species Cn to give a nonvaporizable insoluble product.、For more Methods of Manufacturing (Complete) data for FULLERENES (10 total)、Formulations、Preparations: For soccer-ball-shaped C60 only one isolated pentagon rule (IPR) is possible、it is the smallest stable fullerene. The rugby-ball-like C70 also has only one IPR and is the next stable homologue、followed by the higher fullerenes C76、C78、C80、C82、C84、C90、and C96、Many of the higher fullerenes are chiral ... the number of possible chiral isomers increases with increasing cage size.、General Manufacturing Information: Fullerenes and fullerene-like nanostructures are defined as polyhedral cages made up entirely of five- and six-membered rings. The structural principle obeys Euler's theorem、which states that for the closure of a spherical network of N hexagons、twelve pentagons are required、with the exception of N = 1. Therefore、fullerenes contain 2(10 + N) carbon atoms. Hence、the smallest conceivable fullerene is C20、and all fullerenes must contain an even number of carbon atoms.、The geodesic structure of C60 was named buckminsterfullerene after ...、Richard Buckminster Fuller、who popularized the use of geodesic domes in building construction. This term is now used only rarely、but it gave rise to the abbreviation "fullerenes" for this class of molecules.、C60 can be named (60-、h)fullerene .. The number 60 denotes the number of carbon atoms、the "、h" the symmetry group、Fullerene derivatives can be created by adding endo- or exohedral substituents. This opens the possibility of obtaining a wide range of building blocks for developing new materials with unique properties.、For more General Manufacturing Information (Complete) data for FULLERENES (14 total)。

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这个产品是什么

Fullerenes - C60/C70 mixture (Contains 20% C70 and 1% higher fullerenes) 是一种以碳骨架为基础的有机化合物，登记 CAS 号为 99685-96-8，分子式 C60（分子量 720.6），归属于有机化学品大类化工原料。

识别信息

登记 CAS 号：99685-96-8

其分子式 C60 由 60 个碳 组成。

别名/同义词：Fullerenes - C60/C70 mixture (Contains 20% C70 and 1% higher fullerenes) · Fullerene C60

所属分类：有机化学品

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