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DTA of polyglycine

✍ Scribed by F. Happey; B. M. Watson

Publisher: Wiley (John Wiley & Sons)
Year: 1967
Tongue: English
Weight: 150 KB
Volume: 5
Category: Article
ISSN: 0006-3525
DOI: 10.1002/bip.1967.360051014

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Raman spectra of polyglycines

✍ M. Smith; A. G. Walton; J. L. Koenig 📂 Article 📅 1969 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 571 KB

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

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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

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## Abstract A valence force field has been refined for single‐chain polyglycine II using the known structure and four isotopic derivatives. The calculated frequencies are in good agreement with the observed. The force field is compared with that derived from polyglycine I and for the nylons.

Vibrational properties of helical polygl

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✍ R.D. Singh; V.D. Gupta 📂 Article 📅 1971 🏛 Elsevier Science 🌐 English ⚖ 240 KB

## Frequency distribution function for helical conformation of polyglycine (P.G. II) is obtained from &p&don curves and is compared with that obtained from inelastic neutron scattering in the one phonon and cubic approximation.

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Low temperature infrared spectra of poly

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✍ S. Krimm; K. Kuroiwa 📂 Article 📅 1968 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 360 KB

Iiifrared spectra of polyglycines 1 and I1 obtained a t -170°C. 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