## Abstract Using Wilson's GFโmatrix method as modified by Higgs for infinite helical polymers, dispersion curves and the frequency distribution function have been calculated for polyโLโproline II chain. Infrared spectrum is obtained and a UreyโBradley force field, which provides best fit with the
Dispersion curves of poly-L-proline I chain
โ Scribed by A.M. Dwivedi; V.D. Gupta
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 328 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
An analysis
of the normal modes of vibration and their dispersion for the poly-L-proline I is carried out using Wilson's Gp matrix method 3s modified by H&s for an infinite helical system. The conformational dependence of various modes nnd the effect of&-trots isomerism is discussed.
๐ SIMILAR VOLUMES
## Abstract Dispersion curves and frequency distribution for polyโLโhydroxyproline (PLHP) chain were obtained using Wilson's __GF__ matrix method as modified by Higgs. These are compared with those of polyโLโproline II and polyglycine II, which also have threeโfold screw symmetry. Ring and skeletal
Poly-0-acetyl-hydroxy-L-proline, forms I and I1 have been studied by optical rotatory dispersion (ORD) and ultraviolet spectrophotometry in solution and in the solid state. Cotton effects of opposite sign, but not mirror images, were observed in the 250 mp region for the two forms (Form I, peak 278
Poly-cprolines I and I1 were differentiated by the characteristic bands in the far infrared region. Form I showed two broad bands at about 280 and 160 cm.-l and form 11 two bands at 400 and 670 ern.-'. Furthermore, three broad bands at about 250,200, and 100 cm.-l were observed in the spectrum for f