X-ray Spectroscopy and Pulse Radiolysis of Aqueous Solutions
The interaction of radiation and matter plays a crucial role in studies of aqueous solutions. Depending on the type of radiation, it can either be used a probe or as a source of excitation. With X-ray spectroscopy, high-energy photons are tuned to excite core electrons, giving insight into electroni...
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ftcdlib:oai:escholarship.org/ark:/13030/qt5629824g 2023-05-15T15:52:54+02:00 X-ray Spectroscopy and Pulse Radiolysis of Aqueous Solutions England, Alice Heller Saykally, Richard J 2011-01-01 application/pdf https://escholarship.org/uc/item/5629824g en eng eScholarship, University of California qt5629824g https://escholarship.org/uc/item/5629824g public Chemistry etd 2011 ftcdlib 2019-12-06T23:53:14Z The interaction of radiation and matter plays a crucial role in studies of aqueous solutions. Depending on the type of radiation, it can either be used a probe or as a source of excitation. With X-ray spectroscopy, high-energy photons are tuned to excite core electrons, giving insight into electronic structure and the local chemical environment of both the solvent and solute. In pulse radiolysis, an accelerated electron beam is used as an excitation source to create transient radiolytic products. Here, I present detailed studies using both X-rays and electron beams to investigate aqueous solutions and phenomena.In Chapter 2, I discuss the probing of the pH-dependent aqueous carbonate system by soft X-rays. Spectral changes between carbonate, bicarbonate, carbonic acid, and carbon dioxide are analyzed by comparison with theoretically computed spectra. I also give an introduction to Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy and discuss experimental details for the design and employment of liquid microjets.Chapter 3 describes a variety of different projects aimed at expanding the capabilities of the X-ray absorption experiments. These new directions include characterizing free radicals in solution, developing a new detection technique, exploring X-ray induced damage to solid biomolecules, and potentially investigating unusual nitrogen compounds.In Chapter 4, I explore the interaction of high-energy electrons (8 MeV) with aqueous nickel (II) solutions. Pulse radiolysis combined with UV-visible absorption spectroscopy is used to investigate the kinetics of Ni2+ with water radiolysis products. The rate constant for the solvated electron reaction with Ni2+ is measured up to 300°C, and the electronic spectrum for the monovalent nickel ion is also recorded at high temperatures. Other/Unknown Material Carbonic acid University of California: eScholarship |
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University of California: eScholarship |
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English |
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Chemistry |
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Chemistry England, Alice Heller X-ray Spectroscopy and Pulse Radiolysis of Aqueous Solutions |
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description |
The interaction of radiation and matter plays a crucial role in studies of aqueous solutions. Depending on the type of radiation, it can either be used a probe or as a source of excitation. With X-ray spectroscopy, high-energy photons are tuned to excite core electrons, giving insight into electronic structure and the local chemical environment of both the solvent and solute. In pulse radiolysis, an accelerated electron beam is used as an excitation source to create transient radiolytic products. Here, I present detailed studies using both X-rays and electron beams to investigate aqueous solutions and phenomena.In Chapter 2, I discuss the probing of the pH-dependent aqueous carbonate system by soft X-rays. Spectral changes between carbonate, bicarbonate, carbonic acid, and carbon dioxide are analyzed by comparison with theoretically computed spectra. I also give an introduction to Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy and discuss experimental details for the design and employment of liquid microjets.Chapter 3 describes a variety of different projects aimed at expanding the capabilities of the X-ray absorption experiments. These new directions include characterizing free radicals in solution, developing a new detection technique, exploring X-ray induced damage to solid biomolecules, and potentially investigating unusual nitrogen compounds.In Chapter 4, I explore the interaction of high-energy electrons (8 MeV) with aqueous nickel (II) solutions. Pulse radiolysis combined with UV-visible absorption spectroscopy is used to investigate the kinetics of Ni2+ with water radiolysis products. The rate constant for the solvated electron reaction with Ni2+ is measured up to 300°C, and the electronic spectrum for the monovalent nickel ion is also recorded at high temperatures. |
author2 |
Saykally, Richard J |
format |
Other/Unknown Material |
author |
England, Alice Heller |
author_facet |
England, Alice Heller |
author_sort |
England, Alice Heller |
title |
X-ray Spectroscopy and Pulse Radiolysis of Aqueous Solutions |
title_short |
X-ray Spectroscopy and Pulse Radiolysis of Aqueous Solutions |
title_full |
X-ray Spectroscopy and Pulse Radiolysis of Aqueous Solutions |
title_fullStr |
X-ray Spectroscopy and Pulse Radiolysis of Aqueous Solutions |
title_full_unstemmed |
X-ray Spectroscopy and Pulse Radiolysis of Aqueous Solutions |
title_sort |
x-ray spectroscopy and pulse radiolysis of aqueous solutions |
publisher |
eScholarship, University of California |
publishDate |
2011 |
url |
https://escholarship.org/uc/item/5629824g |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
qt5629824g https://escholarship.org/uc/item/5629824g |
op_rights |
public |
_version_ |
1766387989902000128 |