Graduate Thesis Or Dissertation
 

The rotational motion of molecules in crystalline solids

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/rb68xf29g

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  • Theoretical studies and experimental results are presented for the rotational motion of molecule's in crystalline solids. The group theory is solved for molecules of any symmetry matrix isolated at a site in a crystal field of any symmetry. As the potential terrier to rotation of the molecule relative to the host crystal is raised, certain symmetry operations become decreasingly "feasible" in the sense of Longuet-Higgins. Using correlation methods the symmetry species of the rotational states are deter mined from the free rotation limit to any of the librational limits. Examples of linear, symmetric, spherical, and asymmetric rotors are given. From the symmetry of states and the dipole andHpolarizability tensors, selection rules are applied to predict spectra in the infrared and Raman effect. Comparisons with experimental data are made whenever possible and good agreement with hindered rotor models is obtained for CH ₃ and NH ₃ in argon matrices. New Raman studies are reported for methane isolated in noble gas matrices and the low temperature crystal phases of neat methane which give additional support to the evidence for rotation and the James-Keenan model for the lowest temperature phase of neat CH₄.
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  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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file details MillerRalphE1975.pdf 2017-08-07 Público Descargar