Preparation method for carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials

A nano-hybrid material, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of design and chemical synthesis complexity and limitations, and achieve the effect of good film formation and mild reaction conditions

Active Publication Date: 2015-09-30
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ligand exchange method, in situ polymerization method, and hyperbranched polymer stabilization method can overcome this defect, but there are also complexities and limitations in design and chemical synthesis.

Method used

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  • Preparation method for carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials
  • Preparation method for carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials
  • Preparation method for carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The carboxylic acid type polyfluorene selected in this embodiment is poly[9,9-dioctylfluorene-9,9-bis(propionyl)fluorene](PF8FCOOH), and its structure is as follows:

[0044]

[0045] Among them, n=15.

[0046] (1) Synthesis of 2,7-dibromo-9,9-bis(propionyl)fluorene

[0047] Add 3.24g 2,7-dibromofluorene, 0.25g tetrabutylammonium bromide, and 25mL DMSO to a 100mL three-necked flask equipped with a thermometer and a magnetic stirrer, and inject 5mL of 50% mass fraction of hydroxide under a nitrogen atmosphere. Potassium aqueous solution was reacted at 30°C for 0.5h, then 1.584g of acrylic acid was added, and the reaction was continued for 6h. After the reaction, the reaction solution was poured into a beaker equipped with 200mL deionized water, extracted with dichloroethane until the water layer was colorless, separated, kept the water layer, the pH of the water layer was adjusted to acidic, and the product was precipitated. Filter and dry in a blast oven at 60°C to...

Embodiment 2

[0053] The carboxylic acid type polyfluorene selected in this embodiment is poly[1,1′-biphenyl-9,9-bis(propionyl)fluorene](PFDPCOOH), and its structure is as follows:

[0054]

[0055] Among them, n=12.

[0056] (1) Synthesis of 2,7-dibromo-9,9-bis(propionyl)fluorene

[0057] Add 3.24g 2,7-dibromofluorene, 0.25g tetrabutylammonium bromide, and 25mL DMSO to a 100mL three-necked flask equipped with a thermometer and a magnetic stirrer, and inject 5mL of 50% mass fraction of hydroxide under a nitrogen atmosphere. Potassium aqueous solution was reacted at 30°C for 0.5h, then 1.892g of methyl acrylate was added, and the reaction was continued for 6h. After the reaction, the reaction solution was poured into a beaker equipped with 200mL deionized water, extracted with dichloroethane until the water layer was colorless, separated, kept the water layer, the pH of the water layer was adjusted to acidic, and the product was precipitated. Filter and dry in a blast oven at 60°C to ob...

Embodiment 3

[0063] The carboxylic acid type polyfluorene selected in this embodiment is poly[1,4-phenyl-9,9-bis(propionyl)fluorene] (PFPCOOH), and its structure is as follows:

[0064]

[0065] Among them, n=14.

[0066] (1) Synthesis of 2,7-dibromo-9,9-bis(propionyl)fluorene

[0067] Add 3.24g 2,7-dibromofluorene, 0.25g tetrabutylammonium bromide, and 25mL DMSO to a 100mL three-necked flask equipped with a thermometer and a magnetic stirrer, and inject 5mL of 50% mass fraction of hydroxide under a nitrogen atmosphere. Potassium aqueous solution was reacted at 30°C for 0.5h, then 3.146g of dimethylaminoethyl acrylate was added, and the reaction was continued for 6h. After the reaction, the reaction solution was poured into a beaker equipped with 200mL deionized water, extracted with dichloroethane until the water layer was colorless, separated, kept the water layer, the pH of the water layer was adjusted to acidic, and the product was precipitated. Filter and dry in a blast oven at 6...

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Abstract

The invention relates to a preparation method for carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials. The preparation method comprises the steps that a dibromo fluorene monomer which contains carboxyl is compounded, carboxylic acid type polyfluorene is compounded, and a sol-gel method is adopted to prepare the carboxylic acid type polyfluorene/TiO2 nano-hybrid materials. The preparation method has the advantages that the anionic type polyfluorene is compounded, the sol-gel method is adopted to prepare the carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials, the method is simple, the reaction condition is gentle, two-phase mixing is conducted to approach the molecular level, and the hybrid materials are facilitated to form a homogeneous system; according to the prepared carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials, an obvious fluorescence quenching phenomenon can be observed, separating and transmitting process of electric charges are generated on the interfaces of the polyfluorene and titanium dioxide particles, the film-forming property is good, and therefore the hybrid materials have potential application in the field of photoelectricity.

Description

technical field [0001] The invention belongs to the field of material preparation, and relates to a preparation method of a carboxylic acid type polyfluorene / titanium dioxide nano-hybrid material. Background technique [0002] Conjugated polymers refer to a class of linear polymer materials with π-π* conjugated electronic structures. As a very important class of organic semiconductor optoelectronic materials, they have been used in light-emitting diodes, light-emitting electrochemical cells, solar cells, etc. The field has been widely researched and applied, and polyfluorene is one of them. Conjugated polymer / inorganic semiconductor nano-hybrid materials are a new class of functional composite materials. It combines the advantages of conjugated polymers and inorganic semiconductor nanomaterials. It can not only reflect the characteristics of semiconductors, but also show the small size effect and surface effect of nanomaterials. After coupling, it may also cause hybridizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L65/00C08K3/22C08G61/00C01G23/047
Inventor 李坚徐延明杨凯祥任强汪称意
Owner CHANGZHOU UNIV
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