Proceedings of the Polymer Society of Korea Conference (한국고분자학회:학술대회논문집)

The Polymer Society of Korea (한국고분자학회)
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Induction of Single Helical Screw Sense in Poly (n-Hexyl Isocyanate) by End-capping with a Chiral Moiety

  • Nath G. Yogendra (Department of Materials Science and Engineering and Center for Advanced Materials Research and Education (CAMRE), Gwangju Institute of Science and Technology (GIST)) ;
  • Samal Shashadhar (Department of Materials Science and Engineering and Center for Advanced Materials Research and Education (CAMRE), Gwangju Institute of Science and Technology (GIST)) ;
  • Park, Sang-Yoon (Department of Materials Science and Engineering and Center for Advanced Materials Research and Education (CAMRE), Gwangju Institute of Science and Technology (GIST)) ;
  • Murthy C.N. (Applied Chemistry Department, Faculty of technology and engineering, The M. S. University of Baroda) ;
  • Lee, Jae-Suk (Department of Materials Science and Engineering and Center for Advanced Materials Research and Education (CAMRE), Gwangju Institute of Science and Technology (GIST))
  • Published : 2006.10.13
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Abstract

Helical polymers like polyisocyanates with single screw sense are essential to exhibit sophisticated functions like molecular recognition, self-replication, chirality memory and catalytic activity. One approach that has not been explored is the effect on handedness of the polyisocyanates through end-capping with a chiral residue. Induction of chirality in poly(n-hexyl isocyanate) was studied by end-capping with chiral (R and S) 2-bromo-3-methylbutyryl chloride(R-BMBC and S-BMBC). We have shown that a control over living anionic polymerization of HIC by using a suitable initiator affords an opportunity to introduce chiral end-groups with 100% yield and in high purity. This has resulted in helicity induction through extended lengths several orders of magnitude.

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