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A preparation method of active supramolecular polymers driven by layered double hydroxide biomimetic confinement

A technology of supramolecular polymers and hydroxides, which is applied in the direction of analyzing materials through chemical reactions, and can solve problems such as insufficient activation barriers to control growth kinetics

Active Publication Date: 2022-06-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the activation barrier of aggregates composed of monomers with simple structures is not sufficient to control the subsequent growth kinetics, thus, the preparation of LSPs composed of simple monomers remains a considerable challenge.

Method used

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  • A preparation method of active supramolecular polymers driven by layered double hydroxide biomimetic confinement
  • A preparation method of active supramolecular polymers driven by layered double hydroxide biomimetic confinement
  • A preparation method of active supramolecular polymers driven by layered double hydroxide biomimetic confinement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step A: drop NaOH solution (0.500mol / L) into the solution containing 30.0mmol MgCl 2 ·6H 2 O and 10.0mmolAlCl 3 ·9H 2 O in salt solution (50.0 mL) until pH ≈ 8.50, during which all solutions were freshly prepared from decarbonated distilled water. The slurry was transferred to an autoclave and heated at 110°C for 24 hours, washed three times with decarbonated distilled water, dried in a vacuum drying oven at 70°C, and used for later use to obtain an LDH precursor with a size of 50 nm.

[0034]Step B: Intercalation of various organic small molecules into the LDH layer by ion exchange. First, the stock solutions (pH≈8.00, 12.5mmol / L) of organic small molecules (SG7, BSA, 3-ABSA, 2,5-DABSA, CR and DHNS) were prepared with decarbonated distilled water, and 50 mL of the stock solutions were taken respectively, With stirring, 0.313 g of LDH precursor powder was added thereto, and the temperature was raised to 80°C under N 2 The ion exchange was carried out for 24 hours u...

Embodiment 2

[0039] Step A: Preparation of LDH of various sizes (all solutions were prepared with decarbonated distilled water, LDH product was washed with decarbonated distilled water). 20 nm LDH precursor: add 50.0 mL of NaCl solution (1.00 mol / L) to a 500 mL four-neck flask, add 50.0 mL of 3.75 mmol MgCl 2 ·6H 2 O and 1.25 mmol AlCl 3 ·9H 2 The salt solution of O is marked as solution A, 50.0 mL of NaOH solution (1.00 mol / L) is marked as solution B, N 2 The solutions A and B were added dropwise to the flask under the atmosphere and stirred vigorously. The pH of the suspension was maintained at ≈ 8.00 during the dropwise addition. 2 Aging at room temperature for 24 hours in an atmosphere, washed 3 times with decarbonated distilled water, dried in a vacuum drying oven at 70°C for later use; 50nm LDH precursor: see step A of Example 1 for the preparation method; 100nm LDH precursor: the 50.0mL of NaCl solution (10.0mol / L) was added to a 500mL four-necked flask, and 50.0mL containing 37...

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Abstract

The invention discloses a preparation method of an active supramolecular polymer driven by layered double hydroxide biomimetic confinement. In the present invention, the layered double hydroxide can be used as a nano-material that provides a bionic confinement space, and various simple small molecular monomers are confinement assembled into an ordered supermonomer; after removing the laminate, the supermonomer The monomer can temporarily maintain its shape and properties, and can be further assembled into a living supramolecular polymer with controllable length and narrow dispersion under suitable conditions. Kinetic studies reveal that layered double hydroxides overcome a large energy barrier to inhibit the spontaneous nucleation of monomers and the depolymerization of metastable living supramolecular polymers. The degree of polymerization of living supramolecular polymers can reach ~6000, which exceeds that of all published living supramolecular polymers. This new living polymerization strategy will lead to the exploration of other multifunctional molecules and facilitate the rapid development of functional living supramolecular polymers.

Description

Technical field: [0001] The invention belongs to the technical field of active supramolecular polymerization, in particular to a preparation method of an active supramolecular polymer based on layered double hydroxide biomimetic confinement drive. Background technique: [0002] The development of supramolecular polymers provides a broad blueprint for a new generation of functional materials such as soft matter materials, drug delivery, and catalysts, especially living supramolecular polymers (LSPs) with efficient controllability and uniform dispersion. appeared, providing a novel preparation route for the preparation of supramolecular polymers and their biological applications. Strictly speaking, supramolecular polymers can be defined as LSPs only through cyclic experiments to demonstrate that the active ends of supramolecular polymers can be polymerized multiple times. In 2014, the groups of Sugiyasu and Takeuchi established the first seed-induced LSP via aggregates away f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00G01N21/75
CPCC08G83/008G01N21/75
Inventor 史文颖宗映彤
Owner BEIJING UNIV OF CHEM TECH
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