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US 8,784,765 B2Granted
C70 cube with enhanced photoluminescence and method for preparing the same
AssigneePostech Academy-Industry Foundation
InventorsHee Cheul Choi, Chi Beom Park
Life of this patent
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Abstract
Disclosed in that a fullerene aggregate and a method for preparing the same, and the fullerene aggregate including a cube-shaped crystalline C70 non-solvent aggregate.
Claims24
A cube-shaped C70 fullerene aggregate comprising:
- a plurality of C70 molecules aggregated in the shape of a cube, wherein the cube-shaped C70 fullerene aggregate is crystalline and is a non-solvent aggregate.
A fullerene aggregate comprising:
- a cube-shaped crystalline C70.2mesitylene aggregate.
A method for preparing a C70 aggregate comprising:
- (a) adding a poor solvent selected from isopropanol, methanol, ethanol, acetone, propanol, butanol, acetonitrile, and hexane, or a mixed solvent thereof, to a mesitylene solution of C70 to prepare a mixed dispersion, wherein the poor solvent is slowly added below or equal to a rate where an interface distinguishing the mesitylene layer and the poor solvent layer is maintained in the mixed dispersion;
- and
- (b) allowing the mixed dispersion to stand so that a C70 aggregate may be precipitated.
A method for preparing a C70 aggregate comprising:
- (a) adding a poor solvent selected from isopropanol, methanol, ethanol, acetone, propanol, butanol, acetonitrile, and hexane, or a mixed solvent thereof, to a mesitylene solution of C70 to prepare a mixed dispersion, wherein the mixed solution is sonicated simultaneously with or immediately after adding the poor solvent;
- and
- (b) allowing the mixed dispersion to stand so that a C70 aggregate may be precipitated.
A method for preparing a cube-shaped crystalline C70 non-solvent aggregate, comprising:
- (a) preparing a C70 aggregate including a cube-shaped crystalline C70.2mesitylene aggregate;
- and
- (b) treating the C70 aggregate by thermal annealing under a reducing or inert atmosphere.
Dependencies are inferred from the claim text.