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Related Concept Videos

Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

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Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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Interfacial Electrochemical Methods: Overview01:06

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Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
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Electrochemistry: Overview01:04

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Electrochemistry is the branch of chemistry that studies the relationship between electrical quantities and chemical reactions, particularly oxidation and reduction. Oxidation is the loss of electrons from a substance, whereas reduction refers to the gain of electrons. A substance with a strong electron affinity is called an oxidizing agent (oxidant), and a reducing agent (reductant) is a species that donates electrons. Oxidation and reduction processes are pivotal to electrochemical reactions,...
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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
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Photochemical Electrocyclic Reactions: Stereochemistry01:26

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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.
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Related Experiment Video

Updated: Feb 18, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Covalent Organic Framework Electrocatalysts for Clean Energy Conversion.

Chun-Yu Lin1, Detao Zhang2, Zhenghang Zhao1

  • 1Department of Materials Science and Engineering, University of North Texas, Denton, TX, 76203, USA.

Advanced Materials (Deerfield Beach, Fla.)
|November 25, 2017
PubMed
Summary

Covalent organic frameworks (COFs) offer unique properties for catalysis and energy applications. Research highlights advances in COF-based electrocatalysts for clean energy conversion and storage.

Keywords:
covalent organic frameworkselectrocatalystsenergy conversionenergy storage

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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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Area of Science:

  • Materials Science
  • Catalysis
  • Energy Storage

Background:

  • Covalent organic frameworks (COFs) possess unique properties like high surface area and tunable pores.
  • COFs are emerging materials with potential in catalysis, sensing, and energy applications.

Purpose of the Study:

  • To review recent advances in COF-based catalysts for clean energy conversion and storage.
  • To discuss future research directions for efficient COF electrocatalysts.

Main Methods:

  • Synthesis and design of COF materials.
  • Electrocatalysis for oxygen reduction, oxygen evolution, hydrogen evolution, and CO2 reduction reactions.

Main Results:

  • Progress in COF-based electrocatalysis for key energy reactions.
  • Established design principles for COF materials.

Conclusions:

  • COFs show significant promise for clean energy applications.
  • Further development is needed for efficient COF-based electrocatalysts.