Thèse de doctorat : Université de Fribourg, 2006 ; no. 1503.
The use of organometallic complexes as catalysts became a very significant topic in the field of material chemistry. However, despite of this development, only few of them contain iron(II), except the tridentate complex diimine pyridine developed by Gibson and Brookhart and employed in the olefin polymerization. Unfortunately, this model suffers by its lack of tolerance towards the minor changes...
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Thèse de doctorat : Université de Fribourg, 2017 ; no. 2015.
This thesis is a study of the role of the metal oxide electron transporting material in perovskite solar cells. The central research question is how the metal oxide influences the stability of perovskite solar cells and how the metal oxide can be modified to improve the stability. The thesis begins by providing four background chapters. Chapter 1 explains the need for solar energy and what...
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Thèse de doctorat : Université de Fribourg, 2014.
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Thèse de doctorat : Université de Fribourg, 1994 ; no 1063.
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Thèse de doctorat : Université de Fribourg, 1996 ; Nr. 1142.
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Thèse de doctorat : Université de Fribourg, 2014.
Efficient hydrogen storage is one of the major hurdles towards a potential hydrogen economy. Curved molecules are very interesting for this purpose because of their permanent electrical dipole moment, which can induce a dipole moment on H2 molecules increasing therefore the dipole-dipole interaction and so their adsorption. This work presents the synthesis of a new bowl-shaped polyarene based on...
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Thèse de doctorat : Université de Fribourg, 2010.
The demand for electronic devices has exploded in the last few years. They are all around us and we use them everyday; TV, mobile phones, computers, etc. Most people could not imagine living without them. The presence of these devices has increased the consumption of electrical power and other resources such as silicon and petrol derivatives. This increase has itself created a demand for...
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Thèse de doctorat : Université de Fribourg, 2011.
This work presents the synthesis of a new perfluorinated sulfonic acid function HBC which car¬ries a sulfonic acid at the end of one perfluorinated side-chain.The aim of the introduction of this sulfonic acid is its ability to form proton channels which could be used as electrolyte in pro¬ton exchange membranes for fuel cells. The channels would be created by the formation of stacks of three...
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Thèse de doctorat : Université de Fribourg, 2011.
Organic chemistry may require the use of toxic substances and/or massive amount of energy. The environmental impact is amplified when such chemical reactions are scaled-up to the industrial level. A new concept, called green chemistry, has emerged and aims to minimize the negative effects of chemistry on the environment. Photochemistry fits in green chemistry, because the required photons are not...
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Thèse de doctorat : Université de Fribourg, 2009.
The broad aim of the present work was to improve our understanding of dissociative electron attachment (DEA) processes mediated by Feshbach resonances. DEA represents an important class of processes leading to electron-driven chemical change. Depending on the nature of the resonance (the transient negative ion) which mediates it, DEA processes can be divided into several types. Out of these, the...
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