论文信息 - Wide-Line Proton Magnetic Resonance Studies of Deuterated Poly(γ-benzyl glutamate). Verification of Previous Interpretation for Side Chain Motion

Wide-Line Proton Magnetic Resonance Studies of Deuterated Poly(γ-benzyl glutamate). Verification of Previous Interpretation for Side Chain Motion

The wide-line proton magnetic resonance of poly(γ-benzyl glutamate) (PBG) was studied using two deuterated samples. One was deuterated at the phenyl groups, PBG-d5, and the other, at the benzyl groups, PBG-d7. The temperature dependence of the line width and the second moment was compared with that for PBG. It was found that the use of these deuterated samples made it possible to identify the particular part of the side chain participating in the molecular motion. The results indicated that in PBG, the side chain motion is excited first at the end group and then propagates to the backbone with rise in temperature, in agreement with our previous interpretation. An attempt was made to decompose the second moment of PBG into several components.

K. Hikichi | A. Tsutsumi | Saburo Anzai

[1] Y. Konishi,et al. Molecular Motions of Poly(γ-monosubstituted-benzyl D-glutamate) in the Solid State , 1979 .

[2] K. Hikichi,et al. Dynamic Mechanical Properties of Poly(α-amino acid)s. II. Poly(ε-N-benzyloxycarbonyl-L-lysine) , 1979 .

[3] N. Matsushima,et al. Relaxation phenomena of poly-γ-benzyl-L-glutamate, poly-γ-methyl-L-glutamate, and copoly(γ-methyl-L-glutamate, γ-benzyl-L-glutamate) , 1973 .

[4] A. Tsutsumi. Nuclear Magnetic Resonance of Polyamino Acids. I , 1970 .

[5] K. Hikichi,et al. Dielectric Dispersion of Poly-L-Methionine , 1967 .

[6] K. Hikichi. Molecular Motions of Polymers Having Helical Conformation. II. Poly-β-methyl-L-aspartate, Poly-β-benzyl-L-aspartate and Poly-γ-benzyl-L-glutamate. , 1964 .

[7] J. Sauer,et al. PROTON MAGNETIC RESONANCE OF SOME SYNTHETIC POLYPEPTIDES1 , 1962 .

[8] M. Tsubio. Infrared dichroism and molecular conformation of α‐form poly‐γ‐benzyl‐L‐glutamate , 1962 .

[9] J. H. Van Vleck,et al. The Dipolar Broadening of Magnetic Resonance Lines in Crystals , 1948 .

[10] K. Hikichi,et al. Dynamic Mechanical Properties of Poly(α-amino acid)s. I. Side-Chain Dispersions of Poly(γ-benzyl L-glutamate) and Poly(γ-methyl L-glutamate) , 1976 .