Abstract
Poly[N5-(R and S)-1-(1-pyrenyl)ethyl-L-glutamines] (1 and 2) were prepared by condensation of poly(L-glutamic acid) with optically resolved amines. In solution, these polymers, 2 in particular, gave large circular dichroism (CD) indicative of exciton coupling among the side-chain pyrene chromophores. When compared with the corresponding polymer with achiral side groups, i.e. poly(1-pyrenylmethyl-Lglutamine) (3), 1 and 2 not only gave much stronger CD, but also gave much reduced excimer emission with a significant hypsochromic shift of emission maximum. The highly controlled orientation of the side-chain chromophores is apparently brought about by the specific steric interactions among the bulky chiral side chains along the helical main chain.
Original language | English |
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Pages (from-to) | 1711-1714 |
Number of pages | 4 |
Journal | polymer |
Volume | 43 |
Issue number | 5 |
DOIs | |
Publication status | Published - Jan 7 2002 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry