Helical structures of N-alkylated poly(p-benzamide)s

Nagao Kobayashi, Atsuya Muranaka, Aya Tanatani, Akihiro Yokoyama, Isao Azumaya, Motoo Shiro, Masanobu Uchiyama, Tsutomu Yokozawa

Research output: Contribution to conferencePaperpeer-review


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 languageEnglish
Number of pages2
Publication statusPublished - 2005 Dec 1
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: 2005 Sep 202005 Sep 22


Other54th SPSJ Symposium on Macromolecules


  • Benzamide
  • Circular dichroism
  • Helical structures

ASJC Scopus subject areas

  • Engineering(all)


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