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Related Concept Videos

Alcohols from Carbonyl Compounds: Reduction02:23

Alcohols from Carbonyl Compounds: Reduction

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Reduction is a simple strategy to convert a carbonyl group to a hydroxyl group. The three major pathways to reduce carbonyls to alcohols are catalytic hydrogenation, hydride reduction, and borane reduction.
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
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Grignard reagents are one of the most commonly used reagents used to synthesize alcohols from carbonyl compounds. Grignard reagents are organomagnesium halides with a highly polar carbon–magnesium bond. Due to the partial ionic nature of the C–Mg bond, the carbon functions as a strong nucleophile and attacks electrophiles like carbonyl carbon.
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α,β-Unsaturated carbonyl compounds are molecules bearing a carbonyl and alkene functionality in conjugation with each other. The conjugation in the molecule leads to three resonance structures. The hybrid form exhibits two probable electrophilic sites: the carbonyl carbon and the β carbon.
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α-Substituted ketones or aldehydes can be synthesized from enamines by the Stork enamine reaction, named after its pioneer Gilbert Stork. Enamines are useful synthetic intermediates where the lone pair on nitrogen is in conjugation with the C=C bond. They resemble enolate ions, as the resonance forms of both species have a nucleophilic α carbon.
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A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural.
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A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells
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Microfluidic Preconcentration Chip with Self-Assembled Chemical Modified Surface for Trace Carbonyl Compounds

Jie Cheng1,2, Jianwei Shao3,4, Yifei Ye5,6

  • 1R&D Center of HealthCare Electronics, Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China. chengjie@ime.ac.cn.

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|December 16, 2018
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Summary

This study introduces a novel silicon microfluidic device for quickly and efficiently capturing trace carbonyl compounds in water. This technology offers a promising solution for rapid water quality testing and health risk assessment.

Keywords:
click chemistrymicro columnar preconcentratormicrofluidicsurface modificationtrace carbonyl compounds

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Area of Science:

  • Analytical Chemistry
  • Environmental Science
  • Materials Science

Background:

  • Carbonyl compounds are key water pollutants impacting health risk assessments.
  • Current analytical methods for carbonyls are often complex, slow, and lack sensitivity.

Purpose of the Study:

  • To develop a rapid, convenient, and efficient method for capturing trace carbonyl compounds in water.
  • To engineer a silicon microfluidic device for enhanced detection capabilities.

Main Methods:

  • Fabrication of a silicon microfluidic chip using microelectromechanical systems (MEMS) techniques.
  • Surface functionalization of micro-pillar arrays with amino-oxy dodecane thiol (ADT) via click chemistry.
  • Utilizing finite element (FEM) analysis for chip design.

Main Results:

  • The microfluidic device successfully captured trace levels of carbonyl compounds.
  • Detection of parts per billion (ppb) levels of fluorescent carbonyl compounds was achieved.
  • Demonstrated rapid and efficient performance compared to traditional methods.

Conclusions:

  • The developed microfluidic device shows significant potential for rapid water quality testing.
  • The click chemical surface modification strategy is effective for capturing trace carbonyl compounds.
  • This approach is applicable to various samples requiring trace carbonyl compound analysis.