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 |
|---|---|
| Pages (from-to) | 1711-1714 |
| Number of pages | 4 |
| Journal | polymer |
| Volume | 43 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Jan 7 2002 |
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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; Annaka, Masahiko; Yoshikuni, Masako; Nakahira, Takayuki.
In: polymer, Vol. 43, No. 5, 07.01.2002, p. 1711-1714.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Highly controlled side-chain chromophore orientation in poly [N5-1-(1-pyrenyl)ethyl-L-glutamines]
AU - Shoji, Osami
AU - Nakajima, Daisuke
AU - Annaka, Masahiko
AU - Yoshikuni, Masako
AU - Nakahira, Takayuki
PY - 2002/1/7
Y1 - 2002/1/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0037033756&partnerID=8YFLogxK
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U2 - 10.1016/S0032-3861(01)00740-6
DO - 10.1016/S0032-3861(01)00740-6
M3 - Article
AN - SCOPUS:0037033756
VL - 43
SP - 1711
EP - 1714
JO - Polymer
JF - Polymer
SN - 0032-3861
IS - 5
ER -