Highly controlled side-chain chromophore orientation in poly [N5-1-(1-pyrenyl)ethyl-L-glutamines]

Osami Shoji, Daisuke Nakajima, Annaka Masahiko, Masako Yoshikuni, Takayuki Nakahira

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 languageEnglish
Pages (from-to)1711-1714
Number of pages4
Journalpolymer
Volume43
Issue number5
DOIs
Publication statusPublished - Jan 7 2002
Externally publishedYes

Fingerprint

Dichroism
Chromophores
Glutamine
Pyrene
Polymer solutions
Excitons
Amines
Glutamic Acid
Condensation
Polymers
Acids
LDS 751
pyrene

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Highly controlled side-chain chromophore orientation in poly [N5-1-(1-pyrenyl)ethyl-L-glutamines]. / Shoji, Osami; Nakajima, Daisuke; Masahiko, Annaka; Yoshikuni, Masako; Nakahira, Takayuki.

In: polymer, Vol. 43, No. 5, 07.01.2002, p. 1711-1714.

Research output: Contribution to journalArticle

Shoji, Osami ; Nakajima, Daisuke ; Masahiko, Annaka ; Yoshikuni, Masako ; Nakahira, Takayuki. / Highly controlled side-chain chromophore orientation in poly [N5-1-(1-pyrenyl)ethyl-L-glutamines]. In: polymer. 2002 ; Vol. 43, No. 5. pp. 1711-1714.
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