The laser-excited Raman spectrum of helical polyglycine I1 has been ob1,ained. Oligomers of polyglycine are in the planar zigzag conformation and their llamati spectra are indicative of the spectrum of polyglycine I. The Raman spectra of polyglyciries have bands complementary to the infrared which
Infrared spectra of isotopic polyglycines
โ Scribed by S. Suzuki; Y. Iwashita; T. Shimanouchi; M. Tsuboi
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1966
- Tongue
- English
- Weight
- 626 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0006-3525
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โฆ Synopsis
For infrared absorption measurements, the following five isotopic polyglycines have been prepared : ordinary polyglycine (-NHCH&O-),, N-deuterated polyglycine (-NDCH&O-),, C-deuterated polyglycine (-NHCDzCO-),, completely deuterated polyglycine (-NDCD&O-),, and Nu-substituted polyglycine (--"NHCHZCO-),. Infrared spectra have been observed both in the I and I1 forms of each of these five isotopic polyglycines in the spectral region of 4000-300 cm.-l. On the basis of the comparison of these spectra with each other, a nearly complete set of assignments of the observed bands of polyglycines has been given.
๐ SIMILAR VOLUMES
Iiifrared spectra of polyglycines 1 and I1 obtained a t -170ยฐC. have been compared with those obtained a t room temperature. The ,changes in frequency of some of the C-H stretching bands are consistent with the earlier suggestion that C-H --.O=C hydrogen bonds are present in the structure of polygly
## Abstract The sequential copolymers of glycine and Lโalanine, Lโvaline and Lโalanine, Lโleucine and Lโalanine, and Lโphenylalanine and Lโalanine and those containing the Lโproline residues were synthesized. The infrared spectra in the region from 700 to 200 cm^โ1^ were measured for these polypept
IR and Raman spectra for sodium bifluoride containing 2%, 11% and x80% DFZ are presented. Changes in the DFS u2 and q IR bands with deuteration are related to coupting between Iike oscillators or states. Raman assignments are made for the HFZ ~1 and lattice Librational (Eg) modes. \* For a review of