Abstract
The helical structure of poly(p-benzamide)s (1) bearing a chiral side chain on the nitrogen atom was investigated by UV and CD spectroscopy. The polymers exhibited bisignate CD and much larger compared with the corresponding monomer (2). By applying the coupled oscillator analysis in conjunction with TDDFT calculations, the positive and negative CD signals observed at 300 and 260 nm, respectively, could be assigned to the exciton band arising from the couplings of the long-axis polarized transition of each 4-(alkylamino)benzoyl chromophore. Taking into account the Rosenfeld equation, we assigned the helical sense of the polymers to be right-handed ((P)-helix).
Original language | English |
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Pages | 2800-2801 |
Number of pages | 2 |
Publication status | Published - 2005 Dec 1 |
Event | 54th SPSJ Symposium on Macromolecules - Yamagata, Japan Duration: 2005 Sep 20 → 2005 Sep 22 |
Other
Other | 54th SPSJ Symposium on Macromolecules |
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Country/Territory | Japan |
City | Yamagata |
Period | 05/9/20 → 05/9/22 |
Keywords
- Benzamide
- Circular dichroism
- Helical structures
ASJC Scopus subject areas
- Engineering(all)