Macromolecules
ARTICLE
Present Addresses
†Graduate School of Natural Science and Technology, Kanazawa
University, Kakuma-machi, Kanazawa 920-1192, Japan.
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’ ACKNOWLEDGMENT
This work was supported in part by Grant-in-Aid for Scientific
Research from the Japan Society for the Promotion of Science
(JSPS).
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(16) In the absence of 2, poly-1L and poly-1H showed a linear
relationship in the Huggins plots, and the intrinsic viscosities ([η] (dL/g))
were 0.08 and 1.66, respectively.
(17) A possibility that poly-1 is a dynamic helical polymer consisting
of right- and left-handed helical segments separated by helical
reversals1,11 could not be completely excluded.
(18) The viscosities of the poly-1Lꢀ and poly-1Hꢀ(R)-2 com-
plexes significantly decreased upon the addition of a small amount of
the hydrochloric acid salt of (R)-2 ([(R)-2 HCl]/[carboxy residues of
3
poly-1] = 0.02) independent of the annealing process, indicating that the
polymers are a weak polyelectrolyte in DMSO in the presence of the
chiral amine.
(19) Poly-1L chains were too short to observe the morphology
changes by AFM (see Figure S2).
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dx.doi.org/10.1021/ma200411g |Macromolecules 2011, 44, 2457–2464