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Related Concept Videos

Radical Autoxidation01:20

Radical Autoxidation

The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate light...
Catalysis02:50

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
Catalysis01:27

Catalysis

Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
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Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...
The Z-Scheme of Electron Transport in Photosynthesis01:34

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The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...

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Updated: Jul 1, 2026

Light-driven Enzymatic Decarboxylation
09:58

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Published on: May 22, 2016

Catalyst-Free Aerobic Photooxidation: Mechanistic Pathways and Sustainability Perspectives.

Hyena Suh1, Sohyeon Kim1, Boyoung Y Park1,2

  • 1Department of Biomedical and Pharmaceutical Sciences, Kyung Hee University, Seoul, Republic of Korea.

Chemical Record (New York, N.Y.)
|June 29, 2026
PubMed
Summary

Catalyst-free aerobic photooxidation uses visible light and oxygen for green synthesis. This review unifies diverse reactions under common photoactivation principles for sustainable oxidative chemistry.

Keywords:
aerobic photooxidationcatalyst‐freeoxygen activationphotochemistrysustainable synthesis

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Area of Science:

  • Organic Chemistry
  • Photochemistry
  • Green Chemistry

Background:

  • Catalyst-free aerobic photooxidation is a growing field for visible-light-driven synthesis.
  • It utilizes molecular oxygen as a green oxidant, activating it via substrate excitation or electron donor-acceptor (EDA) interactions.
  • Current literature often treats these reactions as isolated, lacking a unified mechanistic framework.

Purpose of the Study:

  • To provide a unified mechanistic and operational framework for catalyst-free aerobic photooxidation.
  • To organize reported systems into major reaction classes based on common photoactivation principles.
  • To discuss sustainability and operational aspects, including solvent choice and reaction conditions.

Main Methods:

  • Review and organization of existing literature on catalyst-free aerobic photooxidation.
  • Classification of reactions into six major classes based on activation modes.
  • Analysis of recurring relationships between activation, oxygen intermediates, and reactivity.

Main Results:

  • Identified common photoactivation principles governing diverse catalyst-free aerobic photooxidations.
  • Established six major reaction classes with recurring relationships between activation modes, oxygen intermediates, and oxidative reactivity.
  • Highlighted sustainability and operational factors influencing reaction outcomes.

Conclusions:

  • Catalyst-free aerobic photooxidation is a conceptually unified platform.
  • This unified perspective facilitates future development of sustainable oxidative synthesis.
  • Understanding common principles enables broader application and optimization of these reactions.