Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

2.8K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.8K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

26.4K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.4K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

42.4K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.4K
Radical Chain-Growth Polymerization: Overview01:10

Radical Chain-Growth Polymerization: Overview

2.4K
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...
2.4K
Network Covalent Solids02:18

Network Covalent Solids

13.4K
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...
13.4K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

2.5K
The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this...
2.5K

You might also read

Related Articles

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

Sort by
Same author

Synthetic control over proximity of metal and acid dual sites switches the selectivity of acetophenone hydrodeoxygenation.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Near-Infrared-Activated Multiphoton Photocatalytic System for Synergistic Therapy via CO Generation and •OH Production.

Angewandte Chemie (International ed. in English)·2026
Same author

Unveiling the Mechanism of Photocatalytic CO<sub>2</sub> Cycloaddition over Linker-Engineered Metal-Organic Frameworks.

Angewandte Chemie (International ed. in English)·2025
Same author

Covalent organic frameworks as infinite building units for metal-organic frameworks with compartmentalized pores.

Nature chemistry·2025
Same author

Engineered interface coverage and precise cocatalyst placement in MOF-derived heterojunction photocatalysts for selective methane oxidation.

Chemical science·2025
Same author

Decoration of Metal-Organic Frameworks with Coenzyme Mimics for Boosting Photocatalytic Hydrogen Production.

Angewandte Chemie (International ed. in English)·2025

Related Experiment Video

Updated: Jun 28, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

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

13.4K

Crystalline Porous Organic Frameworks Based on Multiple Dynamic Linkages.

Bo Liu1, Panyue Guo1, Xinyu Guan2,3

  • 1College of Chemistry & Pharmacy, Northwest A&F University, Xian Yang Shi, Yangling, 712100, P. R. China.

Angewandte Chemie (International Ed. in English)
|April 24, 2024
PubMed
Summary

Researchers developed novel crystalline porous organic frameworks (CPOFs) using dynamic linkages. These materials exhibit excellent processability and high ammonia capacity, offering a promising solution for gas adsorption applications.

Keywords:
crystalline porous materialsdynamic bondsgas adsorptionmicroporous materialssolution processability

More Related Videos

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
05:26

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

Published on: February 10, 2023

2.5K
Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

48.1K

Related Experiment Videos

Last Updated: Jun 28, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

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

13.4K
Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
05:26

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

Published on: February 10, 2023

2.5K
Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

48.1K

Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Nanotechnology

Background:

  • Boronic acids are versatile building blocks for creating complex molecular architectures.
  • Dynamic covalent chemistry offers pathways to stimuli-responsive and self-healing materials.
  • Porous organic frameworks (POFs) are attractive for gas storage and separation due to their tunable structures.

Purpose of the Study:

  • To develop a new class of crystalline porous organic frameworks (CPOFs) utilizing multilevel dynamic linkages.
  • To investigate the structural integrity and solution processability of the synthesized CPOFs.
  • To evaluate the ammonia (NH3) adsorption capacity of the CPOFs.

Main Methods:

  • Synthesis of CPOFs through in situ condensation of boronic acids, forming B3O3 units linked by dative B←N bonds.
  • Interconnection of superstructures via hydrogen bonds and π-π interactions.
  • Characterization of CPOFs using techniques to assess their structure, porosity, and chemical properties.

Main Results:

  • Novel CPOFs were successfully synthesized using covalent B-O, dative B←N, and hydrogen bonds.
  • The CPOFs demonstrated exceptional solution processability, retaining their structure after dissolution and recrystallization.
  • Gram-scale synthesis was achieved using cost-effective monomers.
  • The CPOFs exhibited high NH3 adsorption capacity due to abundant acidic sites, outperforming existing porous materials.

Conclusions:

  • The developed CPOFs represent a new class of functional porous materials with unique dynamic linkages.
  • Their robust yet processable nature makes them suitable for various applications.
  • The high NH3 adsorption capacity highlights their potential in gas capture and storage technologies.