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Photogeneration av N-heterocykliska karbener: tillämpning i Photoinduced ringa-öppning metates polymerisation
JoVE Journal
Chemistry
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JoVE Journal Chemistry
Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization
DOI:

12:19 min

November 29, 2018

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Chapters

  • 00:04Title
  • 01:12Synthesis of 1,3-Dimesitylimidazolium Tetraphenylborate (IMesH+BPh4)
  • 02:49Photogeneration of 1,3-Dimesitylimidazol-2-ylidene (IMes) and Formation of the 1,3-Dimesitylimidazolium-2-dithiocarboxylate Adduct (IMes-CS2)
  • 04:13Spectrophotometric Titration of Photogenerated IMes
  • 06:12Photoinduced Ring-Opening Metathesis Polymerization (PhotoROMP) of Norbornene (NB) in Miniemulsion
  • 09:29Results: Characterization of N-Heterocyclic Carbene (NHC) Products
  • 11:35Conclusion

Summary

Automatic Translation

Vi beskriver ett protokoll till photogenerate N-heterocykliska karbener (NHCs) genom UV-bestrålning av ett 2-isopropylthioxanthone/imidazolium tetraphenylborate salt system. Metoder för att karakterisera photoreleased NHC och belysa den fotokemiska mekanismen föreslås. Protokollen för ringa-öppning metates fotopolymerisation i lösning och miniemulsion illustrerar potentialen i detta 2-komponent NHC photogenerating system.

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