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A cross-polarisation-magic-angle spinning 13C-n.m.r. study of solid-state cycloamylose inclusion-complexes with substituted benzenes: 13C-chemical shifts and molecular dynamics of the included guests

✍ Scribed by Yoshio Inoue; Takehiro Okuda; Fu-Hua Kuan; Riichirô Chûjô

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
814 KB
Volume
129
Category
Article
ISSN
0008-6215

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✦ Synopsis

The chemical shifts and line-shapes of cross-polarisation-magic-angle sample spinning . 13C-n m-r. resonances have been analysed for p-nitrophcnol, p-hydroxybenzoic acid, benzoic acid, and m-nitrophenol in the solid state and likewise for inclusion complexes with host cyclomalto-hexaose and -heptaose. The trends of the chemical-shift displacements induced by complexation with the cycloamyloses in the solid state did not fully correspond with those for solutions. The line-shapes showed evidence of the rotational motion of the benzene compounds in the cavity of cyclomaltohexaose, but not in that of cyclomaltoheptaose.

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A high-resolution 13C-nmr study of collagenlike polypeptides and collagen fibrils in solid state studied by the cross-polarization–magic angle-spinning method. Manifestation of conformation-dependent 13C chemical shifts and application to conformational characterization
✍ Hazime Saitô; Ryoko Tabeta; Akira Shoji; Takuo Ozaki; Isao Ando; Teruo Miyata 📂 Article 📅 1984 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 987 KB

We have recorded high-resolution l3C-nmr spectra of collagen fibrils in the solid state by the cross-polarization-magic-angle-spinning (CP-MAS) method and analyzed the spectra with reference to those of collagenlike polypetides. We used two kinds of model polypeptides to obtain reference 13C chemica