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Related Concept Videos

Covalent Bonding and Lewis Structures02:46

Covalent Bonding and Lewis Structures

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Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
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Structure of Conjugated Dienes01:16

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Introduction
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
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Olefins, which are unsaturated hydrocarbons containing one or more carbon–carbon double bonds, are broadly divided into alkenes and cycloalkenes. The general chemical formula of an alkene is CnH2n.
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Peptide Bonds02:43

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A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
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There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
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Stable molecules exist because covalent bonds hold the atoms together. The strength of a covalent bond is measured by the energy required to break it, that is, the energy necessary to separate the bonded atoms. Separating any pair of bonded atoms requires energy — the stronger a bond, the greater the energy required to break it.
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Surface Functionalization of Hepatitis E Virus Nanoparticles Using Chemical Conjugation Methods
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Structural Engineering of Semiconductor Nanoparticles by Conjugated Interfacial Bonds.

Yi Peng1, Qiming Liu1, Shaowei Chen1

  • 1Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA 95064, USA.

Chemical Record (New York, N.Y.)
|May 8, 2019
PubMed
Summary

Surface functionalization of semiconductor nanoparticles using olefin and acetylene derivatives creates conjugated bonds. This method enhances control over nanoparticle optical and electronic properties for advanced applications.

Keywords:
charge transferconjugated linkagesemiconductor nanoparticlesiliconsurface anchortitanium dioxide

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Chemistry

Background:

  • Surface functionalization is key to tuning semiconductor nanoparticle properties.
  • Traditional methods use non-conjugated linkages (mercapto, carboxyl, phenol).
  • These linkages limit control over optical and electronic characteristics.

Purpose of the Study:

  • To review recent advances in semiconductor nanoparticle surface functionalization.
  • To highlight the use of olefin and acetylene derivatives for conjugated interfacial bonds.
  • To demonstrate the impact on nanoparticle optical and electronic properties.

Main Methods:

  • Functionalization of silicon (Si) and titanium dioxide (TiO2) nanoparticles.
  • Formation of conjugated interfacial linkages using olefin and acetylene derivatives.
  • Characterization of resulting changes in physicochemical properties.

Main Results:

  • Conjugated interfacial bonds were successfully formed.
  • Significant manipulation of optical and electronic properties was achieved.
  • Si and TiO2 nanoparticles served as effective model systems.

Conclusions:

  • Olefin and acetylene derivatives offer superior control over nanoparticle properties.
  • Conjugated linkages are crucial for advanced applications.
  • Structural engineering of nanoparticles holds significant promise and challenges.