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Updated: Jan 3, 2026

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
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ピラジン付ディケトピロピロロール (DPP):高性能 n型有機熱電体のための新しいポリマー構成要素

Xinwen Yan1,2, Miao Xiong3,2, Jia-Tong Li1

  • 1Department of Materials Science and Engineering, College of Engineering , Peking University , Beijing 100871 , China.

Journal of the American Chemical Society
|November 28, 2019
PubMed
まとめ

新しいピラジン付ディケトピロピロール (PzDPP) ポリマーは,n型有機熱電性物質の記録的な高い電気伝導性と功率因子を達成します. この画期的な発見は,熱電学的応用における有機材料の潜在能力を高めています.

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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
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