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Related Concept Videos

Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
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Conjugation is a form of horizontal gene transfer that primarily occurs in bacteria and some archaea, promoting genetic diversity and adaptation. Bacteria can acquire resistance genes through conjugative plasmids, allowing them to survive antibiotic treatments that would otherwise be lethal. This process involves direct contact between cells through specialized structures such as the sex pilus and is mediated by conjugative plasmids, including the F (fertility) factor.Conjugation requires...
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Solid-phase Synthesis of [4.4] Spirocyclic Oximes
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Energetic Tuning in Spirocyclic Conjugated Polymers.

Hugo Bronstein1, Frank D King2

  • 1Department of Chemistry, University College London, London WC1H 0AJ, UK. h.bronstein@ucl.ac.uk.

Polymers
|April 14, 2019
PubMed
Summary

Researchers developed a new method to tune conjugated polymer energy levels using electronically active spirocycles. This allows fine-tuning of polymer absorption and emission for optoelectronic applications.

Keywords:
conjugated polymerfluorenespirocyclicxanthene

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Organic Electronics

Background:

  • Precise control over conjugated polymer energy levels is crucial for optoelectronic device performance.
  • Spirocycles are typically incorporated into conjugated polymers to improve solid-state microstructure.

Purpose of the Study:

  • To introduce a novel method for energetic tuning of conjugated polymers.
  • To explore the use of electronically active spirocyclic systems for fine-tuning optical properties.

Main Methods:

  • Modification of the size and oxidation state of heteroatoms within orthogonal spirocycles.
  • Synthesis of novel triplet-decker spirocyclic conjugated polymers.

Main Results:

  • Demonstrated fine-tuning of both absorption and emission spectra of conjugated polymers.
  • Successfully synthesized novel triplet-decker spirocyclic conjugated polymers.

Conclusions:

  • Electronically active spirocycles offer a new pathway for precise energetic manipulation in conjugated polymers.
  • This approach enables application-targeted synthesis of polymers with tailored optoelectronic properties.