Abstract
The molecular motion and structure in poly(γ-methyl L-glutamate-co-γ-stearyl L-glutamate)s with various molar compositions were investigated by means of spin-probe technique and 13C CP/MAS NMR. By the latter, it was confirmed that a certain part of long alkyl chains forms paraffin-like crystallites as observed in homopolymer of stearyl L-glutamate, and other part exists as the amorphous phase below crystalline melt. An introduction of a small amount of stearyl group considerably raises the mobility of the spin-probe which is embedded in the side chain region surrounding the α-helical main chain, and further increase of stearyl content does not remarkably alter mobility. It is suggested that spin-probes exist in the amorphous region composed of stearyl groups, and mainly reflect the motional state of this region. the difference of the mobility between methyl L-glutamate side chain and stearyl group are also investigated by the scalar decoupled 13C NMR spectra in the solid state.
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K. Hikichi, K. Saito, M. Kaneko, and J. Furuichi, J. Phys. Soc. Jpn., 19, 557 (1964).
A. Tsutsumi, K. Hikichi, T. Takahashi, Y. Yamashita, M. Matsushima, M. Kanke, and M. Kaneko, J. Macromol. Sci., Phys., B8, 413 (1973).
Y. Yamashita, A. Tsutsumi, K. Hikichi, and M. Kaneko, Polym. J., 8, 114 (1975).
J. Watanabe, H. Ono, I. Uematsu, and A. Abe, Macromolecules, 18, 2141 (1985).
J. Watanabe, Y. Fukuda, R. Gehani, and I. Uematsu, Macromolecules, 17, 1004 (1984).
J. Watanabe, M. Goto, and T. Nagase, Macromolecules, 20, 298 (1987).
L. J. Berliner, Ed., “Spin labeling,” Theory and Applications, Academic Press, New York, N.Y., 1976.
P. Meurisse, C. Friedrich, M. Dvolaitzky, F. Laupretre, C. Nöel, and L. Monnerie, Macromolecules, 17, 72 (1984).
F. Laupretre and L. Monnerie, Macromolecules, 17, 1397 (1984).
J. Schaefer, E. O. Stejskal, and R. Buchdhl, Macromolecules, 10, 384 (1984).
T. Sorita, T. Yamanobe, T. Komoto, and I. Ando, Makromol. Chem. Rapid Commun., 5, 675 (1984).
N. Kusumoto, in “Molecular Motion in Polymer by ESR,” R. F. Boyer and S. E. Keinath, Ed., Harwood, Chur, 1980.
G. L. Slonimski, A. A. Askadskii, and A. I. Kitagorodskii, Vyskomol. Soedin., Ser. A, 12, 494 (1973).
J. H. Freed, J. Chem. Phys., 41, 2077 (1964).
A. Capiomont, B. Chion, J. Lajzerowicz-Bonneteau, and H. Lemaire, J. Chem. Phys., 60, 2530 (1974).
A. L. Kovarskii, A. M. Vasserman, and A. L. Buchachenko, Vyskomol. Soedin., Ser. A, 13, 1647 (1971).
S. A. Goldman, G. V. Bruno, and J. H. Freed, J. Chem. Phys., 76, 1858 (1972).
A. Tsutsumi, Jpn. J. Appl. Phys., 9, 1125 (1970).
Y. Yamashita, A. Tsutsumi, K. Hikichi, and M. Kaneko, Polym. J., 8, 114 (1976).
A. Tsutsumi, K. Hikichi, T. Takahashi, Y. Yamashita, N. Matsushima, M. Kanke, and M. Kaneko, J. Macromol. Sci. Phys., B8, 413 (1973).
G. V. Bruno, J. H. Freed, and C. F. Plonaszek, J. Chem. Phys., 75, 3385 (1971).
A. Tsutsumi, K. Yoshikawa, and T. Hideshima, Rep. Prog. Polym. Phys. Jpn., 28, 505, (1985).
T. Kajiyama, M. Kuroishi, and M. Takayanagi, J. Macromol. Sci.-Phys., B11, 121 (1975).
T. Kajiyama, M. Kuroishi, and M. Takayanagi, J. Macromol. Sci.-Phys., B11, 195 (1975).
M. Tsukahara, T. Yamanobe, T. Komoto, J. Watanabe, and I. Ando, J. Mol. Struct., 159, 345 (1987).
A. Shoji, T. Ozaki, H. Saito, R. Tabeta, and I. Ando, Macromolecules, 17, 1472 (1984).
T. Yamanobe, M. Tsukahara, T. Komoto, J. Watanabe, I. Ando, I. Uematsu, K. Deguchi, T. Fujito, and M. Imanari, Macromolecules, 21, 48 (1988).
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Yamaguchi, M., Tsutsumi, A. Investigation of Molecular Motion and Structures of Side Chains in Poly(γ-methyl L-glutamate-co-γ-stearyl L-glutamate) by Spin-Probe Technique and 13C Cross-Polarization Magic Angle Spinning Nuclear Magnetic Resonance. Polym J 22, 781–792 (1990). https://doi.org/10.1295/polymj.22.781
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DOI: https://doi.org/10.1295/polymj.22.781