Thesis (M.S.)--West Virginia University, 1998. / Title from document title page. "Dec. 3, 1998." Document formatted into pages; contains vii, 19 p. : ill. Includes abstract.

Thesis (Ph. D.)--University of Alberta, 2009. / Title from pdf file main screen (viewed on June 29, 2009). "A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy Department of Chemistry, University of Alberta." Includes bibliographical references.

Thesis (M.Sc. (Chemistry)) - Rhodes University, 2009.

This work hereby presents the synthesis, spectroscopic and photophysical properties of newly synthesized lead (PbPc) and antimony (SbPc) phthalocyanines. The complexes are either unsubstituted or substituted at the peripheral and non-peripheral positions with phenoxy, 4-t-butylphenoxy and 4-benzyloxyphenoxy groups. The photophysical properties of these complexes were studied in dimethylsulfoxide, dimethylformamide, toluene, tetrahydrofuran and chloroform as solvents. The fluorescence spectra for PbPc complexes were different to that of the excitation spectra due to demetallation upon excitation. On the other hand, the excitation spectra of oxidized antimony (Sb(V)Pc) derivatives were found to be similar to absorption spectra. High triplet quantum yields for PbPc and SbPc complexes ranging from 0.70 to 0.86, low triplet lifetimes (20–60 μs in DMSO, while they were <10 μs in the rest of the solvents) and low fluorescence quantum yields were observed and is attributed to the presence of heavy atoms (Pb and Sb ions). The nonlinear optical properties of PbPc complexes were studied in dimethylsulfoxide. The optical limiting threshold intensity (Ilim) for the PbPc derivatives were calculated and ranged from 2.1 to 6.8 W/cm2. The photodegradation studies of the PbPc and SbPc complexes synthesized showed that then are stable.

<p> In this thesis the Mössbauer spectroscopic technique was applied to a wide variety of antimony compounds. </p> <p> Antimony chalcogenides, oxides and a phosphate were studied. No evidence could be found to support the existence of Sb₂S₅. Sb₂O₄ was found to contain Sb(III) and Sb(V) rather than Sb(IV). SbPO₄ and the Sb(III) site in Sb₂O₄ had similar Mössbauer parameters in agreement with their structures. </p> <p> Hexahalo complexes of antimony, some of which contain both (III) and (V) oxidation states, have been examined. These exhibit extremely large isomer shifts which are interpreted as indicating no involvement of the 5s electron pair of Sb in the bonding scheme. </p> <p> A study was made of some antimony-fluorine systems. The spectra of KSbF₅, KSbF₄ and KSb₂F₇ and similar salts were interpreted in terms of the known structures. Other complex antimony fluorides and fluorosulphates have also been examined and possible structures suggested. </p> <p> Three antimony-containing minerals, nadorite, tetrahedrite, and boulangerite have been examined, and attempts made to rationalise the Mössbauer data in terms of known structural parameters. </p> / Thesis / Master of Science (MSc)

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Thesis (M.Sc)(Chemical Technology, Engineering and Technology Management)--University of Pretoria, 2005. / Includes summary. Includes bibliographical references (leaves 75-80).