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A method of regulating supramolecular polymerization

A supramolecular polymer and supramolecular technology, applied in the field of supramolecular chemistry, achieves the effects of strong responsiveness, simple and fast method, and low cost

Active Publication Date: 2021-06-01
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Looking at various researches, there is no case of precise and reversible regulation of depolymerization and repolymerization of supramolecular polymers through orthogonal responses.

Method used

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  • A method of regulating supramolecular polymerization
  • A method of regulating supramolecular polymerization
  • A method of regulating supramolecular polymerization

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 0.5 ml of deuterated chloroform and deuterated acetonitrile at a volume ratio of 1:1 to the NMR tube, add 48 mg of isoheptyl-substituted monomer, dissolve it by ultrasonic, and prepare a 128 mM solution. The proton nuclear magnetic resonance spectrum test was carried out, wherein the NH characteristic peaks of ureidopyrimidinone represented polymers were 13.07ppm, 11.86ppm and 10.17ppm respectively. Add 1 equivalent of KPF 6 Afterwards, the H NMR spectrum test was carried out again. Due to the formation of cyclic dimers, the dimerization planes of ureido pyrimidone were parallel to each other, resulting in shielding, and the peaks of NH moved to high fields, moving to 13.05ppm, 11.72ppm and 9.74ppm respectively. .

Embodiment 2

[0033] KPF 6 Viscosity tests were performed on the isoheptyl-substituted monomers and independent monomers, respectively. As the concentration increases, the independent monomer first maintains a growth trend with a slope of 1, and after approaching 10mM, it begins to grow with a slope of 1.7, indicating that polymerization has occurred; while adding KPF 6 As the concentration increases, the monomer always maintains a growth trend with a slope of 1, indicating that it always maintains a dimer form with a small molecular weight.

Embodiment 3

[0035] Add 0.5 ml of deuterated chloroform and deuterated acetonitrile at a volume ratio of 1:1 to the NMR tube, add 48 mg of isoheptyl-substituted monomer, dissolve it by ultrasonic, and prepare a 128 mM solution. The proton nuclear magnetic resonance spectrum test was carried out, wherein the NH characteristic peaks of ureidopyrimidinone represented polymers were 13.07ppm, 11.86ppm and 10.17ppm respectively. Add 1 equivalent of KPF 6 Afterwards, the H NMR spectrum test was carried out again. Due to the formation of cyclic dimers, the dimerization planes of ureido pyrimidone were parallel to each other, resulting in shielding, and the peaks of NH moved to high fields, moving to 13.05ppm, 11.72ppm and 9.74ppm respectively. . After adding 1 equivalent of benzo-18-crown 6 to the above solution, the peak of NH moved to 13.07ppm, 11.86ppm and 10.17ppm again in the downfield, indicating that after the potassium ion was captured by benzo-18-crown 6, the dimer Supramolecular polyme...

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Abstract

A method for regulating supramolecular polymerization, which relates to the field of responsive polymer materials. A method for orthogonally regulating the supramolecular polymerization process driven by one non-covalent force is provided. The specific operation method is to introduce a diethylene glycol group into the hydrogen bond polymerization monomer to complex with potassium ions to realize the precise and reversible regulation of the quadruple hydrogen bond-driven supramolecular polymerization process by metal coordination. The beneficial effects of the present invention are reflected in: a method of using orthogonal non-covalent force to regulate another non-covalent force-driven supramolecular polymerization is proposed, which is simple, quick, low-cost, and does not affect the hydrogen bond force , Strong anti-interference ability and specific response ability.

Description

technical field [0001] The invention relates to the field of supramolecular chemistry, in particular to a method for precisely regulating supramolecular polymerization. Background technique [0002] Orthogonal self-assembly means that various non-covalent forces do not interfere with each other during the assembly process, so that the assembly is more precise and efficient. In 2012, Li and Xiao et al reviewed advanced supramolecular polymers constructed by orthogonal self-assembly (Chem.Soc.Rev.2012,41,5950-5968.). In 2015, Wei et al. reviewed the orthogonal self-assembled supramolecular polymers by metal coordination and host-guest interactions (Chem.Soc.Rev.2015,44,815-832.). In 2019, Xiao et al. further reviewed supramolecular polymers that are orthogonally self-assembled by host-guest interactions and multiple hydrogen bond interactions (Chin. Chem. Lett. 2020, 31, 1-9.). Throughout various studies, there is no case where the depolymerization and repolymerization of su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 肖唐鑫仲伟伟李正义孙小强
Owner CHANGZHOU UNIV
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