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Related Concept Videos

Oxidation of Alcohols02:37

Oxidation of Alcohols

13.5K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
13.5K
Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

10.9K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
10.9K
Oxidations of Aldehydes and Ketones to Carboxylic Acids01:15

Oxidations of Aldehydes and Ketones to Carboxylic Acids

4.1K
Oxidation of aldehydes and ketones results in the formation of carboxylic acids. Aldehydes, bearing hydrogen next to the carbonyl group, are easily oxidized compared to ketones. This is because an aldehydic proton can easily be abstracted during oxidation.
Aldehydes readily undergo oxidation in strong oxidizing agents such as potassium permanganate and chromic acid. The oxidation can also be carried out using mild oxidizing agents such as silver oxide. In fact, aldehydes can be easily oxidized...
4.1K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

10.7K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.7K
Radical Oxidation of Allylic and Benzylic Alcohols01:21

Radical Oxidation of Allylic and Benzylic Alcohols

2.1K
Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
2.1K
Radical Autoxidation01:20

Radical Autoxidation

2.2K
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...
2.2K

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Green and Low-cost Production of Thermally Stable and Carboxylated Cellulose Nanocrystals and Nanofibrils Using Highly Recyclable Dicarboxylic Acids
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Green and Low-cost Production of Thermally Stable and Carboxylated Cellulose Nanocrystals and Nanofibrils Using Highly Recyclable Dicarboxylic Acids

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Selective Oxidation of Cellulose-A Multitask Platform with Significant Environmental Impact.

Ioana A Duceac1, Fulga Tanasa1, Sergiu Coseri1

  • 1Department of Polyaddition and Photochemistry, "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania.

Materials (Basel, Switzerland)
|July 27, 2022
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Summary

Selective oxidation of cellulose transforms waste into advanced materials for water decontamination and other applications. This method enhances cellulose properties for environmental remediation and diverse industrial uses.

Keywords:
cellulosematerials for environmental applicationsselective oxidation

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Area of Science:

  • Materials Science
  • Environmental Science
  • Chemical Engineering

Background:

  • Increasing demand for fresh water drives research into wastewater purification.
  • Cellulose, derived from raw materials and agro-industrial waste, is cost-effective for environmental applications.
  • Cellulose modification, particularly selective oxidation, yields versatile materials with enhanced properties.

Purpose of the Study:

  • To systematically present methods for selective cellulose oxidation.
  • To survey recent environmental applications of oxidized cellulose.
  • To highlight the potential of oxidized cellulose in wastewater treatment.

Main Methods:

  • Selective oxidation of cellulose, focusing on TEMPO-mediated and periodate oxidation.
  • Chemical modification to alter cellulose surface charge and enable nanometric fibril delamination.
  • Further processing of oxidized cellulose into complex formulations.

Main Results:

  • Selective oxidation provides high regioselectivity, yield, and degree of substitution under mild conditions.
  • Oxidized cellulose demonstrates effectiveness in removing heavy metals, dyes, and organic pollutants.
  • Modified cellulose serves as a versatile platform for applications beyond environmental remediation.

Conclusions:

  • Selective oxidation is a key strategy for developing high-performance cellulose-based materials.
  • Oxidized cellulose offers a sustainable and effective solution for industrial water decontamination.
  • The versatility of oxidized cellulose opens avenues in biomedical, energy, and packaging sectors.