Université de Neuchâtel

Conception de matériaux dendritiques chiraux mésomorphes pour l’élaboration de commutateurs électroactifs basés sur le couple ferrocène/ferrocenium

Kopp, Cyril ; Deschenaux, Robert (Dir.) ; Süss-Find, Georg (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2010.

This thesis focuses on the design of new mesomorphic materials. Two chiral dendrimers were synthesized with the aim to transfer their liquid-crystalline properties to ferrocene derivatives. An evolution towards peralkylated ferrocene gave stable ferrocenium derivatives showing a switch between liquid-crystalline phases. The role of the dendritic structure and oxidation could be explained. Then,...

Université de Neuchâtel

Biogeochemical changes during the Cenomanian-Turonian Oceanic Anoxic Event (OAE 2)

Mort, Haydon ; Adatte, Thierry (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2006 ; 1933.

Understanding how nutrients behave during sub-oxic environments is crucial in predicting future changes in the ocean-climate system. This study focuses on the role of phosphorus, in its different sedimentary reservoirs, during the Cenomanian-Turonian anoxic event (OAE 2), which occurred during the late Cretaceous (~93.5 Ma). In the geological record this period in the Earth’s history is...