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Polymer Classification: Architecture

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
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Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...
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The molecular orbital theory describes the distribution of electrons in molecules in a manner similar to the distribution of electrons in atomic orbitals. The region of space in which a valence electron in a molecule is likely to be found is called a molecular orbital. Mathematically, the linear combination of atomic orbitals (LCAO) generates molecular orbitals. Combinations of in-phase atomic orbital wave functions result in regions with a high probability of electron density, while...
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Updated: May 23, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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One-Dimensional Covalent Organic Frameworks: From Design, Synthesis to Applications.

Pei Huang1, Lu-Hua Hou1, Ming-Yi Yang1

  • 1Guangdong Provincial Key Laboratory of Carbon Dioxide Resource Utilization, School of Chemistry, South China Normal University, Guangzhou, 510006, P.R. China.

Angewandte Chemie (International Ed. in English)
|May 12, 2025
PubMed
Summary
This summary is machine-generated.

One-dimensional covalent organic frameworks (1D COFs) offer enhanced dispersion and active site exposure compared to 2D/3D COFs. This review details their design, synthesis, and diverse applications in catalysis, energy storage, and sensing.

Keywords:
CatalysisCovalent organic frameworksCrystalline structureEnergy conversionOne‐dimensional skeleton

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • One-dimensional covalent organic frameworks (1D COFs) are a significant subclass of COFs.
  • They feature ordered covalent bonds in one dimension and non-covalent interactions in other dimensions.
  • 1D COFs exhibit unique properties like enhanced dispersibility and active site accessibility.

Purpose of the Study:

  • To review recent advancements in 1D COFs.
  • To discuss structure design principles and synthesis strategies.
  • To explore the applications of 1D COFs in various fields.

Main Methods:

  • Literature review of state-of-the-art advances in 1D COFs.
  • Analysis of structure design principles for building blocks.
  • Examination of synthesis strategies and application potentials.

Main Results:

  • 1D COFs demonstrate superior dispersibility and increased opportunities for active site exposure.
  • Weaker interchain/interlayer interactions contribute to their unique properties.
  • Significant application potential in catalysis, energy storage, adsorption, and sensing.

Conclusions:

  • 1D COFs represent a promising area of research with broad applicability.
  • Further investigation into challenges and opportunities is crucial for future development.
  • This review provides insights into the design, synthesis, and applications of 1D COFs.