Liquid Fullerene Derivative, Method for Producing the Same, and Device Using the Same
申请人:Nakanishi Takashi
公开号:US20100019205A1
公开(公告)日:2010-01-28
The liquid fullerene derivative according to the present invention contains a fullerene moiety, a benzene ring bonded to the fullerene moiety, and first to third alkyl substituents R
1
, R
2
and R
3
bonded to 2-, 4- and 6-positions of the benzene ring, respectively, and the first to third alkyl substituents R
1
, R
2
and R
3
each contain at least 12 carbon atoms. The liquid fullerene derivative which is liquid at room temperature without requiring a solvent and easily exhibits the function of the fullerene itself, a method for producing the same, and a device using the same are provided.
Room Temperature Liquid Fullerenes: An Uncommon Morphology of C<sub>60</sub> Derivatives
作者:Tsuyoshi Michinobu、Takashi Nakanishi、Jonathan P. Hill、Masahiro Funahashi、Katsuhiko Ariga
DOI:10.1021/ja063866z
日期:2006.8.1
Room temperature liquid C60 derivatives bearing a 2,4,6-trialkyloxyphenyl branch show a dramatic decrease in viscosity with an increase in the length of the alkyl chains. This feature, when combined with electrochemical activities similar to those of pristine C60 and relatively high charge carrier mobility, makes them an extremely attractive novel carbon material for future applications in materials science.
Illuminating! Isolation of a π-core by covalently attached flexible hydrocarbon chains has been employed to synthesize blue-emitting oligo(p-phenylenevinylene) (OPV) liquids with tunable viscosity and optical properties. A solvent-free, stable, white-light emitting ink/paint, which can be applied onto various surfaces and even onto LEDs, was made by blending of liquid OPVs with emissive solid dopants.
US8092773B2
申请人:——
公开号:US8092773B2
公开(公告)日:2012-01-10
Structural Requirements for Producing Solvent-Free Room Temperature Liquid Fullerenes
A new class of solvent-free room temperature liquid fullerenes was synthesized by attaching a single substituent of 1,3,5-tris(alkyloxy)benzene unit to C-60 or C-70 under the Prato conditions. Although the C-60 monoadducts were single components after chromatographic purification, the C-70 monoadducts were isomeric mixtures due to the prolate spheroidal pi-chromophore. The alkyl chain length of the substituents significantly affected both melting points and rheological behavior of the fullerene derivatives. When the alkyl chains were short, the intermolecular pi-pi interactions of adjacent fullerene cores led to a melting point higher than room temperature. In contrast, in the case of exceedingly long alkyl chains, such as eicosyl (-C20H41) and docosanyl (-C22H45) groups, the van der Waals interactions among neighboring alkyl chains became dominant. Accordingly, only medium alkyl chain lengths could provide solvent-free fluidic fullerenes with low melting points. The rheological measurements of the liquid fullerenes at 25 degrees C revealed their unique liquid characteristics; molecular-level friction (or viscosity) and nanometer-scale clustering were noticed. It is generally thought that alkyl chains serve as a stabilizer of the fullerene core units. Thus, a longer chain or higher plasticity of the stabilizers would promote the disturbance of the core core interactions. It was indeed shown that longer alkyl chains resulted in a lower fluid viscosity. It was also found that metastable solid phases were produced by the noticeable van der Waals interaction between the long alkyl chains especially when a symmetric C-60 core was adopted. This interesting finding enabled the comparison of electrochemical activities of the C-60 unit between the solvent free liquid and metastable solid form, which revealed a superior electrochemical activity in the liquid state.