CHEM Theses and Dissertations

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This collection includes digital copies of master's theses and dissertations (ETD) completed in the Department of Chemistry. The ETD collection has been started in 2005.

A full set of the WSU theses and dissertations may be found at the University Libraries stacks (Call No.: LD2667.T4 A-Z for Master's Theses and LD2667.T42 A-Z for Dissertations) and in Library Special Collections.

Search Libraries Catalog for theses and dissertations bibliographic description, including student and his/her advisor's name, title of work, abstract, links to other digital holdings if available, etc.

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    Acetohydroxamate complexes of some divalent metal ions
    (Wichita State University, 1958-06) Hitchcock, Robert; Christian, Robert V.
    Studies of the stabilities of the metal complexes of acetohydroxarnic acid have been limited to those of iron(III) (1,6) and copper(II) (8) . The present investigation was undertaken in an attempt to establish the relative stabilities of the acetohydroxamate complexes of some divalent metal ions. Jannik Bjerrwn’s (2) well- known titration method seemed to be best suited for this study.
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    Development of analytical protocols for rapid analysis of biological samples with flow-gated capillary electrophoresis
    (Wichita State University, 2023-07) Zhang, Ning; Gong, Maojun
    With the development and improvement of the whole society, people are paying more attention to their health and the protection of the environment, which requires researchers to consider better identification and detection methods for various molecular species. Capillary electrophoresis (CE) and related technologies have been used in the separation, detection, and identification of many organic and inorganic compounds for the past dozens of years because of the advantages of CE, like short analysis time and high separation efficiency. Also, numerous detectors and interfaces can be combined with CE due to the excellent adaptability in order to enhance the performance of detection sensitivity, e.g., laser-induced fluorescence (LIF), mass spectrometry (MS), and electrochemical detection. This thesis is to discuss the determination of essential biomarkers in biological samples on the flow-gated CE-LIF system. It first reports a rapid and sensitive method with the flow-gated CE-LIF system to determine collagen degradation products, including proline, hydroxyproline, and other prolyl dipeptides in human urine samples, which is suited for the early diagnosis of collagen-related diseases. Experimental results prove that this method was capable of the separation and determination of prolyl compounds with good reproducibility, accuracy, sensitivity, and robustness. Second, the utilization of solid-phase extraction (SPE) in the purification and concentration of catecholamines (CAs) highlights the effectiveness of this method as a sample pre-treatment technique for catecholamines in real samples. By effectively removing interfering compounds and enhancing the concentration of the target analytes, SPE contributes to the overall reliability and accuracy of CA analysis.
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    Exploration of sulfur compounds for nonlinear optical applications
    (Wichita State University, 2023-07) Cropek, Craig M.; Wang, Jian
    This thesis attempts to explore acentric inorganic sulfur or thiophosphate compounds for potential nonlinear optical (NLO) applications, and reports the synthesis, crystal growth, electronic structure studies, property measurements, and reviews crystal structures. The current commercially available benchmark mid-IR NLO materials have limitations which limit their usability in the mid-IR range, such as two photon absorption for $ZnGeP_2$ or low laser damage threshold (LDT) for $AgGaS_2$ (AGS) and $AgGaSe_2$. Thus, the continuation to contribute to this field of scientific study persists. Sulfur and thiophosphates exhibit good potential application as mid-IR NLO materials, but still need development to limit the shortcomings of the benchmark NLO materials. For the first compound studied, and based off search results, $La_2PbS_4$ is the first $A_2BS_4$ (A=Rare earth, B=divalent metals) compound, in the $1\bar{4}3d$ (no. 220) space group with a $TH_3P_4$ structure type, to have NLO properties measured prior to this work. $Th_3P_4$ exhibits a low second harmonic generation (SHG) response of 0.22 × AGS and is non-phase matchable. Next, thiophosphates recently have seen a resurgence of study for NLOs. Properties of $KMP_2S_7$ (M = Cr, In) were investigated. $KInP_2S_7$ became the first acentric $[P_2S_6]^{4-}$ unit containing compound to exhibit experimental SHG response, exhibiting a low SHG response of 0.24 × AGS, and being non-phase matchable. Magnetic measurements of $KCrP_2S_7$ verified an antiferromagnetic transition around 21 K. Lastly, $[P_2S_6]^{4-}$ compounds have recently shown great successes for IR NLO properties. Hence, two compounds, acentric $a-Ag_4P_2S_6$ and centrosymmetric $\beta-Ag_4P_2S_6$ were studied. The $a-Ag_4P_2S_6$ and $\beta-Ag_4P_2S_6$ phases were characterized with differential scanning calorimetry (DSC), which revealed their phase transition relationships. Each exhibited photocurrent response and a broad IR window while $a-Ag_4P_2S_6$ exhibited a moderate SHG response of 0.61 × AGS, which was phase matchable, and exhibited a large laser damage threshold (LDT) of 3.2 × AGS.
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    The infrared spectra of benzohydroxamic acid and some of its salts
    (Wichita State University, 1957-05) Farha, Floyd Jr.; Christian, R. V.
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    Structure of the solid oxidation products of carbon blacks
    (Wichita State University, 1957-07) Harvey, Donald J.; Lyon, Luther L.; Crocker, Glenn R.
    The objective of the present investigation was to determine the structural properties of the solid oxidation products of carbon blacks by the use of x-ray diffraction techniques in an attempt to gain information on the location and manner in which oxygen is combined with carbon in carbon blacks. Representative samples of carbon blacks prepared by channel, gas furnace, and oil furnace processes were oxidized by several different methods: (1) gaseous oxygen at 240-360° c. (2) 30% hydrogen peroxide in water (3) potassium chlorate dissolved in concentrated nitric and sulfuric acids and (4) 50% solution of concentrated nitric acid and water. The resulting solid oxidation products were the materials used in this study.
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