Two-dimensional resonance energy transfer system of perylene-polyvinylcarbazole and hydrotalcite and construction method thereof

A resonance energy transfer, polyvinylcarbazole technology, applied in chemical instruments and methods, luminescent materials, etc., to achieve precise and controllable luminescence intensity, reduce luminescence blue shift and fluorescence quenching, and easy to operate.

Inactive Publication Date: 2012-12-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the assembly force, the research on the assembly of hydrotalcite nanosheets and neutral fluorescent molecules with optical functional properties to form ultra-thin films has not been reported so far.

Method used

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  • Two-dimensional resonance energy transfer system of perylene-polyvinylcarbazole and hydrotalcite and construction method thereof
  • Two-dimensional resonance energy transfer system of perylene-polyvinylcarbazole and hydrotalcite and construction method thereof
  • Two-dimensional resonance energy transfer system of perylene-polyvinylcarbazole and hydrotalcite and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Preparation of nitrate intercalated hydrotalcite precursor by co-precipitation method:

[0027] a. Add 0.02mol of solid Mg(NO 3 ) 2 ·6H 2 O and 0.01mol of solid Al(NO 3 ) 3 9H 2 O dissolved in 50mL to remove CO 2 of deionized water;

[0028] b. Dissolve 0.06mol NaOH in 50mL to remove CO 2 of deionized water;

[0029] c. The nitrate mixed solution and lye prepared in steps a and b are used in a fully back-mixed rotary liquid film reactor to realize co-precipitation reaction. By controlling the linear velocity of the full back-mixed rotary liquid film reactor rotor, the reactants can be instantaneously Full contact and collision, the nucleation reaction is completed instantaneously to form a large number of crystal nuclei, react for 1 minute, and then react the mixed crystal nuclei in a pressure reaction vessel with a polytetrafluoroethylene substrate at 150°C for 12-36 hours, using In addition to CO 2 deionized hot water centrifugal washing to neutrality, an...

Embodiment 2

[0037] 1. Preparation of nitrate intercalated hydrotalcite precursor by ion exchange method:

[0038] a. 0.015mol of solid Mg(NO 3 ) 2 ·6H 2 O and 0.005 mol of solid Al(NO 3 ) 3 9H 2 O and 0.08mol urea were dissolved in 70mL of deionized water, in a 90ml polytetrafluoroethylene pressure reaction vessel, crystallized at 100°C for 12 hours, and washed by centrifugation with deionized water until the pH was about 7,70 ℃ drying for 12 hours to obtain carbonate hydrotalcite;

[0039] b. Take 0.3g of the above-mentioned carbonate hydrotalcite and solid NaNO 3 63.75g dissolved in 300mL to remove CO 2 After uniform dispersion in deionized water, add 0.1mL concentrated nitric acid, stir under nitrogen atmosphere, carry out ion exchange reaction at room temperature for 12 hours, and then use 2 The deionized hot water was centrifuged and washed to a pH of about 7, and dried at 70°C for 18 hours to obtain a magnesium-aluminum nitrate intercalated hydrotalcite, and its chemical for...

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Abstract

The invention discloses a two-dimensional resonance energy transfer system of perylene-polyvinylcarbazole and hydrotalcite and a construction method thereof. The construction method specifically comprises the following steps: preparing hydrotalcite colloidal solution peeled by using formamide solvent; preparing methylbenzene solution of the perylene-polyvinylcarbazole; alternatively assembling in two kinds of solution with a substrate processed by hydrophilic treatment to obtain the two-dimensional resonance energy transfer system of the perylene-polyvinylcarbazole and the hydrotalcite. According to the invention, immobilization and thinning for the perylene-polyvinylcarbazole can be realized, meanwhile, the perylene-polyvinylcarbazole is orderly arranged on the molecular scale so as to effectively reduce light-emitting blue-shift and fluorescence quenching result from aggregation caused by over-high local concentration, and have the sign of energy transfer in the two-dimensional space; and the different energy transfer efficiency is obtained by adjusting the doping content of the perylene. The preparation process of the system is easy to operate. The light intensity and the thickness of the system can be accurately controlled by changing the assembling times.

Description

technical field [0001] The invention belongs to the technical field of composite luminescent materials, and in particular provides a two-dimensional resonance energy transfer system of perylene-polyvinylcarbazole and hydrotalcite and a construction method thereof. Background technique [0002] Dispersing small molecular dyes in the polymer matrix can effectively reduce the degree of crystallization of small molecules. Doping polymer light-emitting materials in the transport layer can increase carrier mobility, and doping in the light-emitting layer can reduce the carrier mobility. The intra-chain movement of flow electrons and the self-quenching of excitons can significantly improve the efficiency of light-emitting devices and change the wavelength of fluorescence spectrum by doping, and at the same time, it shows that there is a very effective energy transfer process between dopant molecules and substrates. At present, doping devices with dyes with high fluorescence efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L37/00C08K9/02C08K3/26C08K5/01C08K3/34C08K3/40C08J5/18C09K11/06
Inventor 李震陆军卫敏段雪
Owner BEIJING UNIV OF CHEM TECH
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