Catalytic Polymerizations of Hydrophobic, Substituted, Acetylene Monomers in an Aqueous Medium by Using a Monomer/Hydroxypropyl-β-cyclodextrin Inclusion Complex
✍ Scribed by Lei Ding; Xuefeng Jiao; Jianping Deng; Weiguo Zhao; Wantai Yang
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 184 KB
- Volume
- 30
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
Ten hydrophobic, substituted, acetylene monomers were examined as to their abilities to form an inclusion complex with hydroxypropyl‐β‐cyclodextrin (HPCD). Only the monomers with suitable substitutents were found to form the monomer/HPCD complex, which was identified by NMR, FTIR, and UV‐vis spectroscopy. Polymerizations of the monomers were successfully carried out in aqueous solution by using the prepared monomer/HPCD inclusion complex and by using a water‐soluble Rh‐based catalyst, [Rh(cod)~2~BF~4~] or [Rh(nbd)(H~2~O)OTs]. Such polymerizations provided high‐yield (>90%) polymers with a cis content of approximately 100%. The as‐prepared polymers could take an ordered helical conformation, just like their counterparts obtained in organic solvents.
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