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The Global ETD Search service is a free service for researchers
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Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 11 to 20 of 50 (0.076 seconds)Spelling suggestions: "subject:"amolecular rotation"" "subject:"7molecular rotation""
| 11 |
Electron spin relaxation of Cu(II) dithiocarbamates in solution: a study of reorientational correlation times in toluenePhillips, Paul Stewart January 1978 (has links)
A series of Cu(II)-63 dithiocarbamates with alkyl and cycloalkyl substituents of various shape, size and rigidity has been prepared. Their rotational correlation times (Ƭ₂) were measured (in the fast motional regime) in toluene using the line-widths of their ESR spectra.
The ESR spectra were recorded on paper tape with a digital acquisition system and analysed on an Amdahl 470 computer utilising specially written programs. This procedure results in a substantial improvement in precision over earlier manual methods.
The observed correlation times were compared with those calculated by the QLRF model, the conditional free rotation model, the Stokes-Einstein and Perrin 'stick' hydrodynamic models and the 'slip' hydro- -dynamic model. The results in relation to Pecora's extension of the hydrodynamic model are also discussed.
The statistical mechanical and 'stick' hydrodynamic models proved unsatisfactory. The results are adequately described by the 'slip' hydrodynamic model with an additional term ascribable to a free-rotation correlation time (Ƭ₀); i.e.
Ƭ₂ = Cn + Ƭ₀
¯¯¯
Ƭ
where n is the viscosity of the solvent and C is a function of the size
and shape of the molecule calculated from the ' slip ' theory. / Science, Faculty of / Chemistry, Department of / Graduate
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| 12 |
Low frequency vibration rotation bands of ND₃, NOCL, and CH₃CCH /Brim, Walter Warren January 1960 (has links)
No description available.
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| 13 |
The measurement of absolute rotation through the interference effect for photons /Cheo, Peter K. January 1964 (has links)
No description available.
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| 14 |
Fourth-order vibration-rotation Hamiltonian of nonlinear XYZ molecules /Chan, Miu-Yung January 1971 (has links)
No description available.
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| 15 |
Selected intramolecular rearrangements of polyolefins /Meisinger, Robert Henry January 1973 (has links)
No description available.
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| 16 |
The effects of alignment on the dissociation of H₂ on Pd(111)Isakson, Marcia Joyce. January 2002 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2002. / Vita. Includes bibliographical references. Available also from UMI Company.
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| 17 |
The effects of alignment on the dissociation of H₂ on Pd(111)Isakson, Marcia Joyce 25 April 2011 (has links)
Not available / text
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| 18 |
The rotation-vibration energies of the general polyatomic molecule calculated to fourth order of approximation /Kurtz, Stewart Kendall January 1960 (has links)
No description available.
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| 19 |
The rotational spectrum of hydrogen sulfide /Gillespie, Richard Eugene January 1967 (has links)
No description available.
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| 20 |
Synthesis and characterization of molecules to study the conformational barriers of fluorocarbon chainsNiyogi, Sandip 05 1900 (has links)
Fluorocarbons are known to be stiffer than their hydrocarbon analogues, a property that underlines the extensive industrial application of fluorocarbon materials. Although there has been previous studies on the rotational barrier of molecules having fluorocarbon centers, a detailed systematic study is necessary to quantify flurocarbon stiffness. The molecules, Pyrene-(CF2)n-Pyrene, Pyrene-(CF2)n-F, Pyrene-(CH2)n-Pyrene and Pyrene-(CH2)n-H were therefore synthesized to enable the determination of the barrier to rotation of the carbon backbone in fluorocarbons. Conformational studies will be completed with steady-state and time-dependent emission spectroscopy.
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