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Preparation method of chiral optical thin film with porphyrin intercalation DNA and hydrotalcite compound

A technology of optical thin film and hydrotalcite, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems that limit the application of LDH, and achieve the effects of signal amplification, high-density and orderly stacking, and high orientation

Inactive Publication Date: 2015-03-25
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 large size of most biomolecules, they can only be adsorbed on the surface of LDH particles, which largely limits the further application of LDH.

Method used

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  • Preparation method of chiral optical thin film with porphyrin intercalation DNA and hydrotalcite compound
  • Preparation method of chiral optical thin film with porphyrin intercalation DNA and hydrotalcite compound
  • Preparation method of chiral optical thin film with porphyrin intercalation DNA and hydrotalcite compound

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step A: take by weighing 15.38g Mg(NO 3 ) 2 ·6H 2 O and 11.25g Al(NO 3 ) 3 9H 2 O (Mg / Al=2) dissolved in 150ml to remove CO 2 , Deionized water to prepare mixed salt solution. Another 45ml NH 3 ·H 2 O adjust the above mixed salt solution to pH 8.5 to obtain a slurry. The slurry was placed in a pressure vessel and reacted at 140°C for 12h. use CO 2 1. Centrifugal washing with deionized water for 4 times to obtain a slurry, oven-dried at 60° C. for 24 hours, and the obtained powder product was sealed and stored.

[0026] Step B: Add 0.01 g of the powder product prepared in step A into a three-necked flask filled with 10 mL of formamide solvent, 2 Protected and stirred for 24h. After taking it out, it is centrifuged to remove solid impurities to obtain a clear and transparent colloidal solution, which is sealed and stored.

[0027] Step C: The quartz glass substrate is treated with H at a concentration of 30 wt%. 2 o 2 and concentrated H 2 SO 4 Soak in the...

Embodiment 2

[0035] Step A: take by weighing 23.04g Mg(NO 3 ) 2 ·6H 2 O and 11.25g Al(NO 3 ) 3 9H 2 O, Mg / Al=3, dissolved in 150ml to remove CO 2 , deionized water to prepare mixed salt solution, another 45ml NH 3 ·H 2 O adjust the above mixed salt solution to pH 8 to obtain a slurry. The slurry was placed in a pressure bomb and reacted at 130°C for 10h. use CO 2 1. Centrifugal washing with deionized water for 4 times to obtain a slurry, drying in an oven at 80° C. for 20 hours, and the obtained powder product is sealed and stored.

[0036] Step B: Add 0.05 g of the powder product prepared in step A into a three-necked flask filled with 50 mL of formamide solvent, 2 Protected and stirred for 20h. After taking it out, it is centrifuged to remove solid impurities to obtain a clear and transparent colloidal solution, which is sealed and stored.

[0037] Step C: The quartz glass substrate is treated with 30% H 2 o 2 and concentrated H 2 SO 4 The mixture (volume ratio 1:2) was s...

Embodiment 3

[0045] Step A: take by weighing 17.64g Zn(NO 3 ) 2 ·6H 2 O and 11.25g Al(NO 3 ) 3 9H 2 O, Zn / Al=2, dissolved in 150ml to remove CO 2 , deionized water to prepare mixed salt solution, another 45ml NH 3 ·H 2 O adjust the above mixed solution to pH 7 to obtain a slurry; place the slurry in a pressure vessel and react at 120°C for 10 h to remove CO 2 1. Centrifugal washing with deionized water for 3 times to obtain a slurry, oven-dried at 70° C. for 18 hours, and the obtained powder product was sealed and stored.

[0046] Step B: Add 0.2 g of the powder product prepared in step A into a three-necked flask filled with 150 mL of formamide solvent, 2 Protected and stirred for 15h. After taking it out, it is centrifuged to remove solid impurities to obtain a clear and transparent colloidal solution, which is sealed and stored.

[0047] Step C: The quartz glass substrate is treated with 30% H 2 o 2 and concentrated H 2 SO 4 The mixture (1:2) was soaked for 25min, and then...

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Abstract

The invention discloses a method for preparing a chiral optical thin film with a porphyrin intercalation DNA and a hydrotalcite compound. The technical scheme of the invention is that the method comprises the following steps: firstly, stripping hydrotalcite nano-particles into nano-sheets serving as construction units; secondly, assembling the hydrotalcite nano-sheets with positive charges and a DNA with negative charges by using a layer-by-layer assembly technology; and finally, inserting achiral optical molecular porphyrin into a spiral cavity of the DNA to obtain a thin film material inducing chiral luminescence. A hydrotalcite matrix provides a closed and stable microenvironment for DNA molecules. Ordered packing of high-orientation and high-density DNA arrays can be realized, which is favorable for signal amplification of optical molecules. The achiral optical molecular porphyrin obtains a chiral luminescence characteristic after entering the chiral DNA spiral cavity. Therefore, the invention provides a new method for preparing a chiral optical thin film material.

Description

technical field [0001] The invention belongs to the technical field of preparation of chiral optical thin film materials, and in particular provides a method for preparing chiral optical thin films of porphyrin-intercalated DNA and hydrotalcite composites. Background technique [0002] Chiral optical materials have broad application prospects in chiral data storage and memory, chiral molecular recognition, and chiral sensors. Typically, for chiral optical materials, an intrinsic chiral component (chiral trigger, chiral inducer or chiral matrix) is crucial. Deoxyribonucleic acid (DNA) has become one of the most attractive substrates for inducing chirality due to its double helix properties, inherent chirality, and intercalation properties of various chromophores. However, due to the semi-rigid property, long-chain DNA is often in a coiled state, which greatly limits its application in optical devices. Therefore, how to orderly arrange a single DNA strand and how to pack mul...

Claims

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Application Information

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IPC IPC(8): C09K11/06
Inventor 史文颖卫敏李智雄符艺
Owner BEIJING UNIV OF CHEM TECH
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