Sulfonated cyanine dyes/hydrotalcite composite film and preparation method thereof

A technology of sulfonated cyanine and composite film, applied in chemical instruments and methods, organic dyes, methine/polymethine dyes, etc., can solve the problems of near-infrared absorption and fluorescent films that have not been reported, and achieve the purpose of inhibiting aggregation Generate, enhance photothermal stability, and improve photothermal stability

Inactive Publication Date: 2010-10-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there are many reports on the combination of dyes with visible light emission and hydrotalcites, the research on the assembly of cyanine dyes and hydrotalcites to form near-infrared absorbing and fluorescent films has not been reported so far.

Method used

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  • Sulfonated cyanine dyes/hydrotalcite composite film and preparation method thereof
  • Sulfonated cyanine dyes/hydrotalcite composite film and preparation method thereof
  • Sulfonated cyanine dyes/hydrotalcite composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Preparation of nitrate hydrotalcite precursor by co-precipitation method:

[0024] a. 0.015mol solid Mg(NO 3 ) 3 ·6H 2 O and 0.0075mol of solid Al(NO 3 ) 3 9H 2 O dissolved in 100mL to remove CO 2 of deionized water;

[0025] b. Dissolve 0.0625mol NaOH in 100mL to remove CO 3 of deionized water;

[0026] c. the alkali solution prepared by step b is placed in a four-necked bottle, 2 Stir vigorously under the condition of air protection, and at the same time slowly add the salt solution prepared in step a into the four-necked bottle for about 0.5h. After the addition is completed, adjust the pH value to 8 with 1mol / L NaOH solution. , 60 ℃ water bath reaction for 24h, with CO removal 3 The deionized hot water was centrifuged and washed to a pH of about 7, and dried at 50°C for 24 hours to obtain a magnesium-aluminum nitrate hydrotalcite precursor;

[0027] 2. Take 0.1 g of the magnesium-aluminum nitrate hydrotalcite precursor prepared in step 1 and stir in 10...

Embodiment 2

[0033] 1. Preparation of nitrate hydrotalcite precursor by ion exchange method:

[0034] a. Add 0.01mol of solid Mg(NO 3 ) 3 ·6H 2 O and 0.005 mol of solid Al(NO 3 ) 3 9H 2 O and 0.06mol urea were dissolved in 50mL of deionized water, in a 90ml polytetrafluoroethylene pressure reaction vessel, crystallized at 100°C for 24 hours, and washed by centrifugation with deionized water until the pH was about 7, 50 Dry at ℃ for 24 hours to obtain carbonate intercalated hydrotalcite powder;

[0035] b. Take 0.3 g of the above-mentioned carbonate intercalation hydrotalcite powder and solid NaNO 363.75g dissolved in 300mL to remove CO 2 After uniformly dispersed in deionized water, add 0.09mL of concentrated nitric acid and stir at 20°C under a nitrogen atmosphere to carry out ion exchange reaction for 18 hours and then use 2 The deionized hot water was centrifuged and washed to a pH of about 7, and vacuum-dried at 50°C for 18 hours to obtain a magnesium-aluminum nitrate hydrotalc...

Embodiment 3

[0042] 1. Preparation of nitrate hydrotalcite precursor by co-precipitation method:

[0043] a. 0.02mol solid Zn(NO 3 ) 2 ·6H 2 O and 0.01mol of solid Al(NO 3 ) 3 9H 2 O dissolved in 100mL to remove CO 2 of deionized water;

[0044] b. Dissolve 0.08mol NaOH in 100mL to remove CO 2 of deionized water;

[0045] c. the alkali solution prepared by step b is placed in a four-necked bottle, 2 Stir vigorously under the condition of air protection, and at the same time slowly add the salt solution prepared in step a into the four-necked bottle for about 0.5h. After the addition is completed, adjust the pH value to 8 with 1mol / L NaOH solution. , 60 ℃ water bath reaction for 24h, with CO removal 2 The deionized hot water was centrifuged and washed to a pH of about 7, and dried at 50°C for 24 hours to obtain a zinc-aluminum nitrate hydrotalcite precursor;

[0046] 2. Take 0.13 g of the zinc-aluminum nitrate hydrotalcite precursor prepared in step 1 and stir in 100 ml of formam...

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Abstract

The invention discloses a sulfonated cyanine dyes / hydrotalcite film with near infrared absorption and fluorescent characteristics and a preparation method thereof, belonging to the technical field of organic-inorganic composite optical function materials. The preparation method is characterized by respectively preparing the hydrotalcite colloidal solution and aqueous solution of the sulfonated cyanine dyes; and using the treated substrate with negative charges to carry out layer-by-layer assembly in the two solutions to obtain the sulfonated cyanine dyes / hydrotalcite multi-layer composite film. The composite film has the near infrared absorption and fluorescent characteristics. The sulfonated cyanine dyes carry out ordered layer-by-layer assembly with hydrotalcite nano flake laminates, thus not only enhancing the photo-thermal stability of the sulfonated cyanine dyes, but also simultaneously realizing uniform dispersion and high order of the sulfonated cyanine dyes on the hydrotalciteinterlayer molecular scale and inhibiting the cyanine dyes from aggregation by using cation order and positioning action of the hydrotalcite laminates.

Description

technical field [0001] The invention belongs to the technical field of organic-inorganic composite optical functional materials, and in particular provides a multilayer composite film of sulfonated cyanine and hydrotalcite and a preparation method thereof. The film has near-infrared absorption and fluorescence properties. Background technique [0002] In recent years, near-infrared fluorescent materials have important prospects in medical imaging, optical recording and storage, third-order nonlinear optics and other fields, and have attracted much attention from scholars from all over the world. The corresponding near-infrared absorbing materials have a wide range of applications in night vision and anti-counterfeiting. The molecular chromophore of cyanine dyes and their derivatives has a simple quasi-one-dimensional structure, and its unique structural design features make its absorption and fluorescence properties greatly adjustable. By increasing the length of the conjuga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09B23/08
Inventor 陆军闫东鹏卫敏段雪
Owner BEIJING UNIV OF CHEM TECH
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