Raman Spectroscopic Investigation of CO 2 Clathrate Formation
نویسندگان
چکیده
............................................................................................. ii Dedication...........................................................................................iii Acknowledgments..................................................................................iv Vita....................................................................................................v List of Figures.......................................................................................viii Chapters Chapter.
منابع مشابه
Raman spectroscopic studies of hydrogen clathrate hydrates.
Raman spectroscopic measurements of simple hydrogen and tetrahydrofuran+hydrogen sII clathrate hydrates have been performed. Both the roton and vibron bands illuminate interesting quantum dynamics of enclathrated H(2) molecules. The complex vibron region of the Raman spectrum has been interpreted by observing the change in population of these bands with temperature, measuring the absolute H(2) ...
متن کاملSpectroscopic identification, thermodynamic stability and molecular composition of hydrogen and 1,4-dioxane binary clathrate hydrate
We present the spectroscopic identification of the binary hydrogen and 1,4-dioxane clathrate hydrates in which H2 molecules are encapsulated in small cages of the structure II hydrate framework. X-ray diffraction, solid-state NMR and Raman spectroscopy were used to confirm the mixed hydrate structure and more importantly the occupancy pattern of hydrogen in clathrate cages. The corresponding pr...
متن کاملSpectroscopic signatures of halogens in clathrate hydrate cages. 2. Iodine.
UV-vis and Raman spectroscopy were used to study iodine molecules trapped in sII clathrate hydrate structures stabilized by THF, CH(2)Cl(2), or CHCl(3). The spectra show that the environment for iodine inside the water cage is significantly less perturbed than either in aqueous solution or in amorphous water-ice. The resonance Raman progression of I(2) in THF clathrate hydrate can be observed u...
متن کاملFT-Raman Spectroscopic Studies of Nd/YAG Laser Irradiated Human Dental Enamel
FTR-Raman Spectra of human dental enamel, both laser-irradiated and untreated, are reported. Spectra are compared with hydroxyapatite. It is evident that unlike the CO2 laser, the Nd/YAG laser does not induce any chemical change in dental enamel.
متن کاملTemperature-dependent Raman Spectroscopic Observation for Structural Transformation and Guest Dynamics of Gas Hydrates and Hydroquinone Clathrates
Clathrates are crystalline inclusion compounds formed by a physically stable reaction between host and guest molecules. Gas hydrate and hydroquinone (HQ) clathrate are one of the most studied and welldefined clathrate compounds. In this study, guest-free, CO2-loaded, CH4-loaded and CO2/CH4-loaded HQ clathrates were synthesized by gas-phase reaction and recrystallization. In addition, pure CO2 a...
متن کامل