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A kind of active supramolecular polymer and preparation method thereof

A technology of supramolecular polymers and polymers, applied in the field of active supramolecular polymers and their preparation, can solve the problems of unused active supramolecular polymerization and unobserved characteristics of active supramolecular polymerization, and achieve rich chemical composition, Strong luminous properties, size controllable effect

Active Publication Date: 2021-07-20
THE UNIVERSITY OF HONG KONG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, this route has not been used in the design of living supramolecular polymerisation
In the existing reports, there are studies on the use of macromolecule-small molecule systems to regulate the crystallization behavior of small molecules, for example, the use of hydrogen bonds between macromolecules and small molecules to regulate the crystallization of small molecules, macromolecules to induce the assembly of small organic molecules and macromolecules to induce planar small molecules to form liquid crystals (GuY, et al., Macromolecules 2008, 41, 2299; Huang M, et al., J.Am.Chem.Soc. 2010, 132, 3700; Thünemann AF, et al. , J.Am.Chem.Soc.2003, 125, 352), but did not observe the characteristics of living supramolecular polymerization

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  • A kind of active supramolecular polymer and preparation method thereof
  • A kind of active supramolecular polymer and preparation method thereof
  • A kind of active supramolecular polymer and preparation method thereof

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preparation example Construction

[0092] In some cases, the preparation method of the present invention further includes a step of constructing aligned metal nanoparticles or nanowires using the formed supramolecular polymer as a precursor.

[0093] The supramolecular polymerization method in the present invention generally comprises at least two components: a planar or linear solvent-repellent small molecule component and a solvent-friendly polymer component. In embodiments performed in aqueous solution, the planar or linear small molecule components are hydrophobic and the polymer components are hydrophilic. Non-covalent interactions between small molecules include but are not limited to metal-metal interactions, π-π interactions, hydrogen bonds, solvent-phobic interactions, or combinations thereof, and supramolecular polymerization is induced by non-covalent interactions between small molecules to promote the growth of supramolecular polymers. The polymer components act to stabilize the formed supramolecul...

Embodiment 1

[0227] Example 1. Complex 1 and PEG 45 -b-PAA 69 The two-component supramolecular polymerization (see No. 1 in Table 1)

[0228] Compound 1 (0.15mM) and PEG 45- b-PAA 69 (The subscript represents the degree of polymerization of each block, and the concentration of carboxylic acid is 1 mM). After mixing in an aqueous solution, and incubating at room temperature for 1 day, a supramolecular polymer can be obtained. The pH of the mixed solution was 5, the PAA block was negatively charged due to partial carboxyl deprotonation, and there was an electrostatic attraction between the positively charged complex 1 and PAA.

[0229] Transmission electron microscope observation found that the prepared two-component supramolecular polymer is a nanofiber with an average diameter of 10 nm and a length of several microns ( Figure 10 ). As a control, a solution of complex 1 alone and PEG alone 45 -b-PAA 69 None of the solutions formed nanofibers.

[0230] The EDX energy spectrum of TEM...

Embodiment 2

[0233] Example 2. Complex 1 and PEG 45 -b-PAA 69 Research on the process of two-component supramolecular polymerization (see No. 1 in Table 1)

[0234] Transmission electron microscope observation found that complex 1 and PEG 45 -b-PAA 69 Aggregates with a size of about 10 nm ( Figure 13 ). After incubation at room temperature for 1 hour, nanofibers were formed, and the average diameter of the nanofibers was 10 nm, and the average length was 440 nm ( Figure 14 ). After 12 hours, the length of the nanofibers grew to the micrometer level ( Figure 15 ). After 1 day of cultivation, the average diameter of the nanofibers was still 10 nm, and the length was several microns ( Figure 10 ). The length of the nanofibers increased with incubation time, but the average diameter remained constant. In view of the fact that nanofibers have a nanocrystal structure in which complexes are arranged in an orderly manner, the two-component supramolecular polymerization of complexes a...

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Abstract

The invention provides a supramolecular polymer with active characteristics, which is prepared by two-component supramolecular polymerization of a planar or linear small molecule component and a polymer component. Small molecular components are solvent-repellent, and under the control of polymer components, they can be connected to each other through non-covalent interactions such as metal-metal interactions, π-π interactions, hydrogen bonds, and solvent-repellent (hydrophobic) interactions. supramolecular polymers. The polymer component is solvophilic and combines with the small molecular component through non-covalent interactions such as electrostatic attraction, which plays a role in stabilizing the supramolecular polymer. The chemical composition, nanostructure, and size of supramolecular polymers can be tuned by the chemical composition of the small molecule components, the chemical composition and structural parameters of the polymer components, the formulation, the interaction between the small molecule components and the polymer components, etc. Change. The formed two-component or multi-component supramolecular polymer has active ends, and the newly added planar or linear small molecular components can continue to grow at the active ends. The invention also provides a method for living supramolecular polymerization of a two-component or multi-component system.

Description

technical field [0001] The invention relates to an active supramolecular polymer and a preparation method thereof, belonging to the technical field of supramolecular polymers and supramolecular polymerization, and specifically to the technical field of assembling planar molecules into supramolecular polymers with active characteristics. Background technique [0002] One of the topics of supramolecular chemistry and nanotechnology is the development of preparation methods for size-controllable, regular and complex assemblies of small molecules, macromolecules, and nanoparticles based on non-covalent interactions. Among them, supramolecular polymerization can connect assembly units to each other through non-covalent interactions, and the assembly units (also called supramolecular monomers) used in supramolecular polymerization include small molecules, macromolecules, nanoparticles or combinations thereof. According to current definitions, supramolecular polymers are a broad an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 任咏华张卡卡梁宇律杨靖琳陈冠华
Owner THE UNIVERSITY OF HONG KONG
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