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Preparation for photo-response Pyr-AZO non-covalent decorating carbon nano tube material

A non-covalent modification, carbon nanotube technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effects of good solubility, simple preparation process, and good light response characteristics

Active Publication Date: 2012-07-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are no reports or patents on the preparation of photoresponsive carbon nanotube materials and their photoelectric properties by using non-covalent adsorption between pyrene groups and carbon nanotubes.

Method used

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  • Preparation for photo-response Pyr-AZO non-covalent decorating carbon nano tube material
  • Preparation for photo-response Pyr-AZO non-covalent decorating carbon nano tube material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] 1) Carbon nanotube treatment: add 20 mg of less-walled carbon nanotubes to 20 ml of a mixed solution with a mass fraction of 98.3% concentrated sulfuric acid and a mass fraction of 65% concentrated nitric acid in a volume ratio of 3:1, and make the mixed solution at a temperature of 70° C. Reflux for 40 minutes. After diluting the mixed acid solution with deionized water, filter and recover the filter cake, wash the filter cake with deionized water until the pH of the filtrate is 6-7, and dry in vacuum for 48 hours;

[0020]2) Synthesis of 1-amino-6-[4-(4'-nitrophenylazo)phenoxy]hexane: under stirring, 1.38g p-nitroaniline was dissolved in 20ml 3mol / L HCl aqueous solution , recorded as solution A; add 0.83g of sodium nitrite to 5ml deionized water, and record as solution B; mix solution A and solution B, and record as solution C; react in a water bath for 40 minutes. Dissolve 0.94g of phenol and 4g of NaOH in 20ml of deionized water and record it as solution D; mix sol...

Embodiment 2

[0024] 1) Carbon nanotube treatment: add 20 mg of less-walled carbon nanotubes to 20 ml of a mixed solution with a mass fraction of 98.3% concentrated sulfuric acid and a mass fraction of 65% concentrated nitric acid in a volume ratio of 3:1, and make the mixed solution at a temperature of 70° C. Reflux for 40 minutes. After diluting the mixed acid solution with deionized water, filter and recover the filter cake, wash the filter cake with deionized water until the pH of the filtrate is 6-7, and dry in vacuum for 48 hours;

[0025] 2) Synthesis of 1-amino-6-[4-(4'-nitrophenylazo)phenoxy]hexane: same as 2) in Example 1;

[0026] 3) Synthesis of pyrene-azobenzene organic molecules: Weigh 128 mg of pyrene butyric acid and dissolve it in 80 ml of anhydrous DMF, add 96 mg of N-hydroxysulfosuccinimide (Sulfo-NHS), 4-dimethylaminopyridine ( DMAP) 54 mg, add 68 mg of 1-ethyl-3-(3-trimethylaminopropyl) carbodiimide hydrochloride (EDC·HCl) under constant stirring in an ice-water bath, ...

Embodiment 3

[0030] 1) Carbon nanotube treatment: add 20 mg of less-walled carbon nanotubes to 20 ml of a mixed solution with a mass fraction of 98.3% concentrated sulfuric acid and a mass fraction of 65% concentrated nitric acid in a volume ratio of 3:1, and make the mixed solution at a temperature of 70° C. Reflux for 40 minutes. After diluting the mixed acid solution with deionized water, filter and recover the filter cake, wash the filter cake with deionized water until the pH of the filtrate is 6-7, and dry in vacuum for 48 hours;

[0031] 2) Synthesis of 1-amino-6-[4-(4'-nitrophenylazo)phenoxy]hexane: same as 2) in Example 1;

[0032] 3) Synthesis of pyrene-azobenzene organic molecules: Weigh 128 mg of pyrene butyric acid and dissolve it in 20 ml of anhydrous DMF, add 180 mg of N-hydroxysulfosuccinimide (Sulfo-NHS), 4-dimethylaminopyridine ( DMAP) 98 mg, add 102 mg of 1-ethyl-3-(3-trimethylaminopropyl) carbodiimide hydrochloride (EDC·HCl) under constant stirring in an ice-water bath...

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Abstract

The invention discloses a preparation method for photo-response pyrene-azobenzene non-covalent decorating carbon nano tube material. The method comprises the following main processes: a few-walled carbon nano tube is added into sulfuric acid and nitric acid mixed solution so as to obtain the few-walled carbon nano tube with better dispersity; N-hydroxy sulfo-Sulfo-NHS and 1- ethyl-3-(3-Trimetlylamine propyl group) EDC HCl catalytic pyrenebutanoic acid are used for condensation reaction to nitro linear alkyl amido-azobenzene so as to obtain Pyr-AZO; then photo-response pyrene-azobenzene non-covalent decorating carbon nano tube body can be composed by using the adsorption of a pyrene structure and pi-pi electronic conjugated bonds on the surface of the carbon nano tube. In the method, through non-covalent interaction, the obtained carbon nano tube-azobenzene composite has an excellent dissolubility and has an excellent photo-response character.

Description

technical field [0001] The invention belongs to the preparation method of photoresponsive carbon nanotube material in the technical field of nanomaterials, and in particular relates to the preparation of photoresponsive pyrene-azobenzene non-covalently modified carbon nanotube material. Background technique [0002] Carbon nanotubes have a good conjugated system, high electron affinity, strong photostability, good mechanical properties and photoelectric properties, etc., so that they have great application potential in optoelectronic devices. Photoresponsive azobenzene derivatives have unique optical isomerization characteristics. Through functional compounding with nanomaterials such as organic conjugates, polymers, and carbon nanotubes, ideal optically tunable microstructures or optoelectronics can be obtained. performance of light-responsive functional materials. [0003] Recently, photoresponsive nanomaterials have become a research hotspot in this field due to the incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46B82Y30/00
CPCY02E10/549
Inventor 封伟刘红坡冯奕钰
Owner TIANJIN UNIV
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