Author: Moges AbebePublisher:
ISBN:
Category :
Languages : en
Pages : 68
Book Description
Raman Spectroscopic Studies of Water Under High Pressure
Author: Moges AbebeRaman Spectroscopic Studies of Vitreous SiO2 Under High Pressure and High Temperature
Author: Mohammad-Bagher Sadeghi HokmabadiPublisher:
ISBN:
Category :
Languages : en
Pages : 122
Book Description
In situ Spectroscopic Techniques at High Pressure
Author: Andreas BraeuerPublisher: Elsevier
ISBN: 0444634207
Category : Science
Languages : en
Pages : 396
Book Description
In situ Spectroscopic Techniques at High Pressure provides a comprehensive treatment of in-situ applications of spectroscopic techniques at high pressure and their working principles, allowing the reader to develop a deep understanding of which measurements are accessible with each technique, what their limitations are, and for which application each technique is best suited. Coverage is also given to the instrumental requirements for these applications, with respect to the high pressure instrumentation and the spectroscopic components of the equipment. The pedagogical style of the book is supplemented by the inclusion of "study questions" which aim to make it useful for graduate-level courses. - Bridges the gap between supercritical fluid science/technology and in-situ spectroscopic techniques - Provides a powerful guide to applying spectroscopic techniques as gainful sensors at high pressure - Highlights the influence of a high pressure environment and high pressure equipment on spectroscopic techniques - Presents a deep understanding of which measurements are accessible with each technique, what their limitations are, and for which application each technique is best suited
Raman Spectroscopic Studies in Supercritical Water
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
Reaction studies have been carried out on the destruction of nitrogen-containing compounds such as ammonium, nitrates, and species containing aromatic nitro functionality. The destruction of ammonium ion in near-critical and supercritical water using Raman spectroscopy is the subject of this presentation. Reaction rates were determined from Raman spectra and from measurements of system pressure. Concentrations of key species in the reactor effluent were determined via off-line assay. The effects of temperature, pressure, and concomitants on reaction rate were determined. The reaction half-life is below ten seconds at 400 C with better than 95% conversion. Oxides of nitrogen were not generated in detectable quantities. The studied system is a model for the destruction of ammonium in municipal wastes.
Raman Spectroscopy Applied to Earth Sciences and Cultural Heritage
Author: J. DubessyPublisher: The Mineralogical Society of Great Britain and Ireland
ISBN: 0903056313
Category : Science
Languages : en
Pages : 519
Book Description
Spectroscopic methods such as Raman are used to investigate the structure and dynamics of matter. They are essential for the study of the different types of mineral or organic materials produced at the Earths surface or interior. As a result of technological improvements in gratings, detectors, filters and personal computers in the last decade, many micro-Raman spectrometers have become plug-and-play instruments, very easy to use and available at a lower cost than the early Raman microprobes. Thus, many laboratories in Earth Sciences and Cultural Heritage are equipped with these new spectrometers. Commercial, portable Raman spectrometers working in the field have also contributed to the spread of Raman spectroscopy. Poor levels of education in terms of Raman spectroscopy in undergraduate courses in Earth Sciences make it difficult for individuals to obtain information of the highest quality relevant to Earth sciences and Cultural Heritage. This volume is, therefore, timely. Four main topics are addressed: Theory; Methodology, including the instrumentation; Experimental aspects; and Application.
Raman Spectroscopic Studies of Ice at High Pressures
Author: Gary Edward SlarkRaman Spectroscopy of Gases and Liquids
Author: A. WeberPublisher: Springer Science & Business Media
ISBN: 3642812791
Category : Science
Languages : en
Pages : 327
Book Description
The Raman effect is a most useful tool for the study of molecular vibrations and molecular structure. Information about the structure and symmetry of molecules, as well as about their vibrational energies can be obtained to a reasonable degree of satisfaction from their infrared and Raman vibrational spectra. The body of knowl edqe of the vibrational infrared and Raman spectra of molecules is immense and is now so well organized and understood that it is found to be represented in any stan dard upper level undergraduate curriculum in chemistry. The rotational energies of a molecule and quantitative details about its structure can only be obtained through the techniques of microwave, and high-resolution infrared and Raman spectroscopy of low pressure gases and vapors. The results of such investigations are of interest . not only to the academic scientists, but also to scientists and engineers who are active in applied fields of chemistry and physics, as well as the atmospheric sciences. This book deals with basic investigations of the Raman scattering of light by gases, with some attention also being given to liquid substances. After a brief in troductory chapter that delineates the historical development of Raman spectroscopy of gases, high-resolution rotation-vibrational and pure rotational Raman spectros copy is described in Chapters 2 and 3. The all-important intensity parameter, the Raman scattering cross section, is treated in Chapter 4, while the broadening of Raman lines due to the effects of intermolecular forces is taken up in Chapter 5.
Spectroscopic Methods in Mineralogy
Author: A. Beran Publisher: The Mineralogical Society of Great Britain and Ireland
ISBN: 9634636624
Category : Science
Languages : en
Pages : 676
Book Description
Raman Spectroscopic Studies of the High Pressure Behavior of Network Forming Tetrahedral Oxide Glasses
Author: Daniel John DurbenPublisher:
ISBN:
Category : Glass
Languages : en
Pages : 420
Book Description
Raman Spectroscopy of Carboxylic Acid and Water Aggregates
Author: Zhifeng XuePublisher: Logos Verlag Berlin GmbH
ISBN: 3832528482
Category : Science
Languages : en
Pages : 262
Book Description
In the present work the carboxylic acid dimers and water clusters are chosen as model systems of strong and moderately strong hydrogen bonds and studied with spontaneous Raman spectroscopy coupled with a supersonic jet expansion. The spectra of several carboxylic acids are measured and assigned in the entire fundamental wavenumber region. An overview of their vibrations is achieved by comparing our experimental results with former experimental results as well as with quantum chemical calculations. For the first time, we know from experiment how anharmonic the hydrogen bond vibrations of formic acid are and it is proved that the hydrogen bond becomes stiffer when moving from formic acid to acetic acid. Now there is a very complete spectroscopic data base for formic acid dimer, which can be used to rigorously test quantum chemical calculations. Besides, we finally know from experiment how strongly the OH oscillators are coupled to each other in the simplest ring clusters of water. All this was only possible by the use of spontaneous Raman scattering in supersonic expansions, which is a really powerful tool to investigate hydrogen bonded systems.