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Vibrational spectra of N-acetylglycine oligomers. Part 2. - Raman scattering study of selectively C-deuteriated oligomers with polyglycine I- and II-type structures
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J. Chem. Soc., Faraday T rans., 1997, 93(2), 313-319 -Reproduced by permission of The Royal Society of Chemistry (RSC)
Selectively C-deuteriated N-acetylglycine trimer and tetramer acid types have been synthesized, and their two crystalline modifications, solid-A and solid-B [which correspond in structure to polyglycine (PG) II and I, respectively] have been prepared. Raman scattering spectra have been measured for a series of these glycine oligomers, and the CH2- and CD2-characteristic modes have been investigated in detail. Assignment of the CH2-characteristic bands to each CH2 group in the oligomers has been carried out successfully. In particular, the results obtained from the CD2 stretch region show that N- and C-terminal glycine residues for the PGI- and PGII-type trimers and tetramers are all in very similar environments and that the glycine residues which are sandwiched between the two terminal residues are also in a similar environment for both the trimers and the tetramers.
Vibrational spectra of N-acetylglycine oligomers. Part 2. - Raman scattering study of selectively C-deuteriated oligomers with polyglycine I- and II-type structures
本文_fulltext
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