Block and Random Living, Ring-Opening Metathesis Copolymerization of Functionally Differentiated Carbazole-Containing Norbornene Monomers

✍ Scribed by Yeonsuk Roh; Nathan L. Bauld

• Book ID: 101390061
• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 108 KB
• Volume: 344
• Category: Article
• ISSN: 1615-4150
• DOI: 10.1002/1615-4169(200202)344:2<192::aid-adsc192>3.0.co;2-1

✦ Synopsis

The synthesis of novel diblock polymers containing both a potential charge transport and a non-linear optic block has been accomplished. The synthesis exploits the living, ring-opening metathesis block copolymerization of two norbornene type monomers, one of which contains an unsubstituted N-carbazolyl ring while the other has a bromo substituent at the 3-position of the carbazole ring. Conversion of the bromo functionality to a 2,2dicyanovinyl group introduces the non-linear optic property. The first monomer was prepared by the previously reported efficient cation radical Diels± Alder cycloaddition of N-trans-1-propenylcarbazole to 1,3-cyclopentadiene, while the second was obtained by N-bromosuccinimide bromination of the first monomer. For purposes of comparison, the corresponding random copolymer was also synthesized.