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

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

139
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
139
Molecular Shape and Polarity03:37

Molecular Shape and Polarity

53.0K
Dipole Moment of a Molecule
53.0K
Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

1.6K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
1.6K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.4K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
1.4K
Polar Covalent Bonds02:24

Polar Covalent Bonds

20.6K
Covalent bonds are formed between two atoms when both have similar tendencies to attract electrons to themselves (i.e., when both atoms have identical or fairly similar ionization energies and electron affinities). Nonmetal atoms frequently form covalent bonds with other nonmetal atoms. For example, the hydrogen molecule, H2, contains a covalent bond between its two hydrogen atoms. When two separate hydrogen atoms with a particular potential energy approach each other, their valence orbitals...
20.6K
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

9.0K
For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
9.0K

You might also read

Related Articles

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

Sort by
Same author

Interfacial Acid Sites-Mediated ZnO-Based Electrocatalysts for Sustainable Dual-Pathway H<sub>2</sub>O<sub>2</sub> Production and Rechargeable Zn-H<sub>2</sub>O<sub>2</sub> Electrochemical Cell.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

The Prognostic Value of Early Treatment Factors for Cognitive Behavioral Therapy for Insomnia (CBT-I) Outcomes.

Nature and science of sleep·2026
Same author

Decoupling Parasitic Reactions From Bravais Law-Guided Electroredox Toward Highly Reversible (101)-Textured Zn Anodes for Ah-Scale Batteries.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Deciphering voltage decay in lithium-rich manganese-based cathodes: the pivotal role of cation mixing-driven structural degradation.

Journal of colloid and interface science·2026
Same author

Engineering CO<sub>2</sub> Reduction Pathways via Alloy-Support Interactions in Li-CO<sub>2</sub> Batteries.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Regulation Roles of p-Block Elements in Lithium Layered Oxide Cathodes: Recent Progress and Perspectives.

Advanced materials (Deerfield Beach, Fla.)·2026
Same journal

NIR and Oxidative Stress-Modulated Intestinal Peristalsis Motion of Tubular Conductive Thermo-Hydrogel Actuator.

Nano-micro letters·2026
Same journal

Droplet-Merging and Dissolution-Induced Intermediate State Strategy Enabled Efficiency > 17.5% for the Printed Organic Solar Cells.

Nano-micro letters·2026
Same journal

Nano-Confined Solar-Thermal Water Purification Boosted by Physical Field Disturbance Coupled with Ultrafast Non-Radical Advanced Oxidation Process.

Nano-micro letters·2026
Same journal

In Situ Probing of Electrochemical Hydrogen Evolution Reaction Intermediates: From Single-Crystal Models to Nano-Catalysts.

Nano-micro letters·2026
Same journal

Hetero-Solvent Microenvironment for Selective CO<sub>2</sub> to Ethanol Electrolysis via Interfacial Water Control.

Nano-micro letters·2026
Same journal

Coordination-Entropy Regulation: Toward Unified Design of Hydrogel Electrolytes for Practical Wide-Temperature Zinc-Ion Batteries.

Nano-micro letters·2026
See all related articles

Related Experiment Video

Updated: Apr 30, 2026

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

12.8K

Polarisation Engineering in Covalent Organic Frameworks for Catalysis.

Xinqiang Wang1, Xiaoning Li2, Minna Li2

  • 1Institute of Science and Technology for New Energy, Xi'an Technological University, Xi'an, 710021, People's Republic of China.

Nano-Micro Letters
|April 28, 2026
PubMed
Summary
This summary is machine-generated.

Polarisation in covalent organic framework (COF) catalysts enhances charge transport and reduces energy loss. This review explores how designing COF polarisation offers tunable internal electric fields for improved catalytic performance.

Keywords:
Built-in electric fieldCatalysisCharge separationCovalent organic frameworksPolarisation engineering

More Related Videos

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
08:25

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Published on: January 17, 2020

6.6K
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

17.5K

Related Experiment Videos

Last Updated: Apr 30, 2026

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

12.8K
Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
08:25

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Published on: January 17, 2020

6.6K
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

17.5K

Area of Science:

  • Materials Science
  • Catalysis
  • Physical Chemistry

Background:

  • Polarisation in covalent organic frameworks (COFs) is a key strategy for enhancing catalytic activity.
  • Unlike traditional materials, COFs allow for programmable polarisation through molecular and lattice design.

Purpose of the Study:

  • To provide a comprehensive analysis of polarisation in COF catalysts.
  • To connect the origins, characterisation, and catalytic roles of polarisation in COFs.
  • To discuss opportunities for using polarisation as a predictive design principle.

Main Methods:

  • Analysis of multiscale origins of polarisation (bond-level, conjugation, framework structure).
  • Summary of experimental and theoretical characterisation techniques.
  • Illustration through photocatalytic and electrocatalytic case studies.

Main Results:

  • Polarisation arises from electronic asymmetry, conjugation, and structural organisation in COFs.
  • Polarisation influences ground-state electrostatics, excited-state dynamics, and interfacial effects.
  • Engineered polarisation reshapes charge separation, transport, and reaction pathways in catalysis.

Conclusions:

  • Polarisation engineering is crucial for optimising COF catalysts.
  • Further research can establish polarisation as a predictive design principle for advanced COF catalysts.
  • This review offers an integrated perspective on polarisation in next-generation COF catalysts.