A method for growing fullerene crystals in supramolecular gel media

A supramolecular gel, fullerene technology, applied in fullerene, nanocarbon and other directions, can solve the problems of scattered fiber distribution, poor experimental repeatability, uncontrollable length, etc., and achieve uniform fiber diameter distribution, high order, Simple to use effects

Active Publication Date: 2018-10-23
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the liquid-liquid interface precipitation method is currently the most widely used method, but because the liquid-liquid interface precipitation method cannot eliminate the influence of solvent convection effect, crystal sedimentation effect, container wall effect, etc., resulting in poor experimental repeatability and fiber distribution. Scattered, uneven fiber diameter distribution, uncontrollable length, etc.
In addition, the existing methods cannot achieve effective controllable growth length of fullerenes and growth of ultra-long crystals. Therefore, it is particularly important to develop a new and effective fullerene crystallization method

Method used

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  • A method for growing fullerene crystals in supramolecular gel media
  • A method for growing fullerene crystals in supramolecular gel media
  • A method for growing fullerene crystals in supramolecular gel media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1. Preparation C 60 the solution

[0058] 0.035g C 60 The powder was dissolved in 25 mL of m-xylene to prepare a concentration of 1.4 mg / mL of C 60 solution.

[0059] 2. Preparation containing C 60 the gel

[0060] Add 0.02g of gelling agent e into the glass bottle, then add 1mL of C with a concentration of 1.4mg / mL 60 solution, heated to completely dissolve the gelling agent e, cooled naturally to form a solution containing C 60 gel.

[0061] 3. C 60 crystallization of

[0062] containing C 60 Add 1 mL of acetone as a precipitant to the gel, seal the glass bottle, and place it in a constant temperature reaction box at 20°C for 2 days to crystallize. Such as figure 1 As shown, dendritic C 60 crystals.

[0063] 4. Separation C 60 the crystal

[0064] After the crystallization is over, pour out the solution in the glass bottle, then add methanol to destroy the gel, and take out the C 60 Crystals were cleaned with methanol and stored after drying.

Embodiment 2

[0066] In Example 1, the acetone used is replaced with an equal volume of acetonitrile, and other steps are the same as in Example 1 to obtain rod-shaped C 60 crystal (see figure 2 ).

Embodiment 3

[0068] 1. Preparation C 60 the solution

[0069] 0.035g C 60 Dissolved in 25mL m-xylene, prepared to a concentration of 1.4mg / mL C 60 solution.

[0070] 2. Preparation containing C 60 the gel

[0071] Add 0.02g of gelling agent e into the glass bottle, then add 1mL of C with a concentration of 1.4mg / mL 60 solution, heated to completely dissolve the gelling agent e, cooled naturally to form a solution containing C 60 gel.

[0072] 3. C 60 crystallization of

[0073] Add 0.02g of gelling agent e and 1mL of m-xylene into a glass bottle, heat to dissolve gelling agent e completely, and then add it to the glass bottle containing C 60 On the gel, natural cooling makes it contain C 60 A blank gel buffer layer with a height of 1.0 cm was formed on the gel, and 1 mL of acetonitrile was added on the buffer layer as a precipitating agent. After the glass bottle was sealed, it was placed in a constant temperature reaction box at 20 ° C for 3 days to crystallize. Such as image...

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Abstract

The invention discloses a method for culturing fullerene crystals in a supramolecular gel medium. According to the method molecular gel is taken as a matrix, the influence of inevitable adverse factors of the traditional crystallization method of convection effect of a solvent, crystal settling effect, container wall effect and the like on fullerene crystallization can be effectively avoided, and high-quality fullerene crystals can be cultured by adding an appropriate precipitating agent. The used gel matrix has the characteristics of high transparency, stimulative responsibility and the like, can realize visualization of crystal growth and effectively realizes separation between the crystals and the gel medium. By utilizing the crystallization method disclosed by the invention, superlong C60 fibers which are highly ordered in arrangement and uniform in diameter distribution can be rapidly cultured, length-to-diameter ratio of the fibers can reach up to 23000, and the lengths of the C60 crystal fibers can be effectively regulated and controlled by changing height of fullerene gel. The crystallization method disclosed by the invention not only can realize crystallization of fullerene but also can carry out the crystallization of other organic semiconductors.

Description

technical field [0001] The invention belongs to the technical field of preparation of fullerene crystals, in particular to a method for cultivating fullerene crystals in a supramolecular gel medium. Background technique [0002] Fullerene is a new type of spherical molecule, which is composed of pure carbon atoms bonded by covalent bonds. It is the third elemental crystal form of carbon found after graphite and diamond. Among the various fullerene families, the C 60 The most in-depth research, it is a stable molecule formed simply by combining carbon atoms, with 60 vertices and 32 faces, of which 12 are regular pentagons, 20 are regular hexagons, and its relative molecular mass is about 720. It can be called the most stable one in the fullerene family. Due to its unique molecular structure, fullerene has unique physical and chemical properties. Therefore, the study of fullerenes and their derivatives has become one of the important research hotspots of scientists today. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/152
CPCC01P2002/72C01P2002/82C01P2004/01C01P2004/03C01P2004/04C01P2004/10
Inventor 刘凯强高升房喻王酸酸王今强吴颖刘建飞付旭伟孙晴晴
Owner SHAANXI NORMAL UNIV
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