Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

MO Theory and Covalent Bonding

MO Theory and Covalent Bonding

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...

Lewis Structures of Molecular Compounds and Polyatomic Ions

Lewis Structures of Molecular Compounds and Polyatomic Ions

To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:

Covalent Bonding and Lewis Structures

Covalent Bonding and Lewis Structures

Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.

Covalently Linked Protein Regulators

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....

Characteristics and Nomenclature of Copolymers

Characteristics and Nomenclature of Copolymers

Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Antiphospholipid antibodies in acute and post-treatment Lyme disease.

Infection and immunity·2026

Same author

Spatial Transcriptomic Profiling Reveals Microenvironment-Dependent Immune Signatures in a Lyme Arthritis model.

bioRxiv : the preprint server for biology·2026

Same author

Complement C5a/C5aR1 pathway facilitates glioblastoma progression via fostering glioma stem cell-macrophage symbiosis.

Journal of neuroinflammation·2026

Same author

Omnidirectional dual-femtosecond absolute ranging for high-precision multi-target coordinate measurement.

Optics express·2026

Same author

The identification of metabolites from gut microbiota in HPV infection via network pharmacology.

PloS one·2026

Same author

Dual Targeting of DNA and EGFR by ZYH005 Induces DNA Damage and Mitotic Catastrophe in Glioblastoma.

MedComm·2026

Search research articles

Related Experiment Video

Updated: Jun 13, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

Linear oligo(phenylenevinylene)-based covalent organic frameworks.

Xingjiang Yu¹, Yuelin Zhong¹, Wenbo Dong¹

¹College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.

Chemical Communications (Cambridge, England)

|September 16, 2024

Summary

This study introduces novel covalent organic frameworks (COFs) using oligo(phenylenevinylene) for improved photocatalytic hydrogen evolution. The crystalline COFs-950-OMe show enhanced surface area, boosting their potential for clean energy applications.

More Related Videos

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

Related Experiment Videos

Last Updated: Jun 13, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

Area of Science:

Materials Science
Chemistry
Renewable Energy

Background:

Covalent organic frameworks (COFs) are porous materials with tunable properties.
Photocatalytic hydrogen evolution is a key process for renewable energy production.
Oligo(phenylenevinylene) units show potential in enhancing COF performance.

Purpose of the Study:

To synthesize and characterize novel linear oligo(phenylenevinylene)-based COFs.
To investigate the effect of linkage ratios (β-ketoenamine to imine) on COF properties.
To evaluate the performance of these COFs in photocatalytic hydrogen evolution.

Main Methods:

Synthesis of a series of linear oligo(phenylenevinylene)-based COFs.
Characterization of COF crystallinity, surface area, and chemical structure.
Testing COF performance in photocatalytic hydrogen evolution experiments.

Main Results:

Successfully synthesized linear oligo(phenylenevinylene)-based COFs with varying linkage ratios.
COFs-950-OMe, featuring methoxy side groups, were found to be crystalline.
Crystalline COFs-950-OMe exhibited a higher surface area compared to amorphous counterparts.
Preliminary results indicate promise for enhanced photocatalytic hydrogen evolution.

Conclusions:

Linear oligo(phenylenevinylene)-based COFs are promising materials for photocatalytic hydrogen evolution.
Methoxy side groups can induce crystallinity and increase surface area in COFs.
Further research is warranted to optimize COF structure for maximum hydrogen evolution efficiency.