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Method for preparing perylene bisimide nanometer fibers through one-step method

A peryleneimide and nanofiber technology is applied in the field of preparation of peryleneimide nanofibers, which can solve the problems of cumbersome preparation steps, complicated materials and high cost, and achieves cheap and easy-to-obtain raw materials, mild and environmentally friendly reaction conditions, and good dispersive effect

Active Publication Date: 2016-01-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation of peryleneimide nanofibers needs to modify peryleneimide, modifying phenyl or long-chain alkyl at its bay or secondary amino position (L.Zang, Y.CheandJ.S.Moore, AccountsofChemicalResearch ,[J]2008,41,1596-1608.), the preparation steps are relatively cumbersome, the materials are complicated, the cost is high, and the time is long

Method used

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  • Method for preparing perylene bisimide nanometer fibers through one-step method
  • Method for preparing perylene bisimide nanometer fibers through one-step method
  • Method for preparing perylene bisimide nanometer fibers through one-step method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Prepare an ammonia solution with a mass concentration of 25%; add 20 mg of PTCDA to the prepared ammonia solution so that the mass ratio of PTCDA to ammonia in the ammonia solution is 1:50, and mix evenly; heat the mixed solution at 140°C for 12 hours under reflux, A perylene imide nanofiber solution is obtained; the solution is concentrated, filtered, washed, and freeze-dried to obtain a peryleneimide nanofiber solid.

[0025] The experimental result of embodiment 1 shows:

[0026] Such as figure 1 As shown, the experimental results are very close to the standard spectrum of perylene imide, in the figure 3400cm -1 There are obvious aromatic secondary amine peaks at 1700cm -1 There is a strong carbonyl peak at 1600cm -1 The left and right peaks are N-H bending vibration absorption peaks; dissolve the perylene imide nanofibers in water and wait for them to disperse evenly. Physical photos such as figure 2 As shown, the prepared peryleneimide nanofiber solution was ...

Embodiment 2

[0028] 10 groups of parallel experiments were designed, and the mass concentrations of the prepared ammonia solutions were 0.005%, 0.01%, 0.05%, 0.5%, 1%, 5%, 10%, 20%, and 25%, and all the other preparation methods were the same as in Example 1.

[0029] Table 1 Different ammonia solution concentrations make perylene imide nanofiber solid performance comparison table

[0030]

[0031] It can be seen from Table 1 that when the concentration of ammonia water is 0.01-25%, the morphology and dispersibility of the obtained peryleneimide nanofibers are good, and the higher the concentration of ammonia water, the better the morphology and dispersibility of the obtained nanofibers , the lower the concentration of ammonia water, the slightly worse morphology and dispersion performance of the obtained nanofibers.

Embodiment 3

[0033] Eight sets of parallel experiments were designed, and the mass ratios of PTCDA and ammonia were: (1:0.001), (1:0.005), (1:0.01), (1:0.1), (1:1), (1:10) , (1:20), (1:50), and all the other preparation methods are the same as in Example 1.

[0034] Table 2 Comparison table of solid properties of peryleneimide nanofibers prepared with different mass ratios of PTCDA and ammonia

[0035]

[0036] It can be seen from Table 2 that the higher the mass ratio of PTCDA to ammonia, the worse the solid morphology of the prepared peryleneimide nanofibers and the more large particles of impurities.

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Abstract

The invention discloses a method for preparing perylene bisimide nanometer fibers through a one-step method. The method for preparing the perylene bisimide nanometer fibers includes the steps that certain mass of perylene-3,4,9,10-tetracarboxylic acid dianhydride (PTCDA) is added to an ammonia solution of certain concentration, the reaction temperature and time are controlled, a perylene bisimide nanometer fiber solution is obtained, the perylene bisimide nanometer fibers are washed and dried, and solid powder of the perylene bisimide nanometer fibers is obtained. The method for preparing the perylene bisimide nanometer fibers has the advantages that the perylene bisimide nanometer fibers are prepared through the one-step method in a molecular self-assembly mode, the reaction condition is mild and environmentally friendly, the used raw materials are cheap and easy to obtain, no catalyst is needed, and the method is novel and unique; the prepared perylene bisimide nanometer fibers have good dispersibility in water and organic solvent and can be widely applied to catalytic reactions, preparation of solar cells, nanometer sensors and novel nanometer somposites, preparation of novel electrochemical electrodes, the field of novel optical and conductive materials and the like.

Description

technical field [0001] The invention relates to a method for preparing peryleneimide nanofibers, in particular to a method for preparing peryleneimide nanofibers in one step. Background technique [0002] At the end of the last century, with the discovery of carbon nanotubes, one-dimensional nanomaterials have become more and more widely used. From carbon nanotubes to one-dimensional nanofibers, nanoribbons, and metal nanowires, one-dimensional nanomaterials have been continuously reported. In the preparation of one-dimensional nanomaterials, self-assembly methods are also playing an increasingly important role. Self-assembly refers to a behavior in which basic structural units form spontaneously to obtain an ordered structure. Such as peryleneimide and arylene acetylene rings, etc., all form one-dimensional nanostructures and structures due to self-assembly. Due to factors such as higher aspect ratio and larger specific surface area, one-dimensional nanomaterials have mo...

Claims

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Application Information

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IPC IPC(8): C07D471/06
CPCC07D471/06
Inventor 袭锴胡栋华陈鹏鹏刘彦峰孟震贾叙东
Owner NANJING UNIV
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