Optically active vinyl polymers containing fluorescent groups—7: The distribution of monomeric units in cationically prepared copolymers of 9-vinylcarbazole and (−)menthyl vinyl ether

✍ Scribed by E. Chiellini; R. Solaro; A. Ledwith; G. Galli

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 295 KB
• Volume: 16
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(80)90119-6

✦ Synopsis

A~tract--u.v. Absorption, I H-NMR, fluorescence emission and circular dichroism spectra together show clearly that stereoregular copolymers obtained cationically from 9-vinylcarbazole and (-)menthyl vinyl ether have significant block-like character. In contrast to results for related optically active copolymers, plots of circular dichroism absorption intensity versus copolymer composition exhibit a pronounced maximum corresponding to a molar composition 20% 9-vinylcarbazole, 80°~, (-)menthyl vinyl ether. This maximum does not correspond, as expected, with the presence of isolated carbazole units in a chiral polymer environment.