LOW-FREQUENCY VIBRATIONAL-SPECTRA OF SOME HOMOPOLYPEPTIDES IN SOLID-STATE
LOW-FREQUENCY VIBRATIONAL-SPECTRA OF SOME HOMOPOLYPEPTIDES IN SOLID-STATE
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DOI：
10.1002/bip.1973.360121210
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发表时间：
1973-01-01
期刊：
影响因子：
2.9
通讯作者：
FANCONI, B
中科院分区：
文献类型：
--
作者：
FANCONI, B
测量了聚甘氨酸、聚-L-丙氨酸和聚-L-缬氨酸的低频拉曼和远红外光谱。这些同聚肽的拉曼光谱在 100 cm−1 附近表现出强烈的谱带。聚甘氨酸的晶格计算用于将强拉曼带分配给旋转晶格模式。对于β构象的同聚肽，观察到红外带，其频率与肽重复单元的质量的平方根成反比变化。该红外波段归属于氢键伸缩晶格振动。
Low‐frequency Raman and far‐infrared spectra of polyglycine, poly‐L‐alanine, and poly‐L‐valine have been measured. The Raman spectra exhibit an intense band near 100 cm−1for these homopolypeptides. Lattice calculations of the polyglycines are used to assign the intense Raman band to a rotary lattice mode. For homopolypeptides in the β conformation, an infrared band is observed whose frequency varies inversely with the square root of the mass of the peptide repeating unit. This infrared band is assigned to the hydrogen bond stretching lattice vibration.