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Updated: May 8, 2026

Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates
07:32

Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates

Published on: January 17, 2018

"フィボナッチの経路"は,レギオレギュラーオリゴ ((3-ヘキシルチオフェン) への経路である

Felix P V Koch1, Paul Smith, Martin Heeney

  • 1Department of Materials, Eidgenössische Technische Hochschule (ETH) Zürich , Wolfgang-Pauli-Strasse 10, 8093 Zürich, Switzerland.

Journal of the American Chemical Society
|August 17, 2013
PubMed
まとめ

研究者らは,地域の通常のオリゴ3アルキルチオフェンを合成する新しい方法を開発し,純物質のグラムの量を生成しました. このアプローチにより,36個の繰り返し単位で,これまでで最も長い地域正規のオリゴ ((3-ヘキシルチオフェン) が得られました.

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Woodward–Hoffmann Selection Rules and Microscopic Reversibility

Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...
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Frost Circles for Different Conjugated Systems

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