COFs represent such a class of materials and are assembled of rigid, symmetric, highly functionalized building blocks. The nitroxide exchange reaction between multifunctional alkoxyamines and nitroxides represents a new approach to generate these materials. Therefore, a robust procedure for the synthesis of multifunctional alkoxyamines with different geometries was successfully established in this thesis. As counterparts, several nitroxides were synthesized, resulting in more than 50 possible combinations for the generation of porous materials.
In addition to COFs, non-crystalline frameworks such as POPs can also serve as storage platforms for gaseous energy carriers. Therefore, in a second project, multifunctional azides were prepared and subsequently converted into strongly expanded, porous polymers. The specific surface area of these materials could be controlled with the reaction temperature, while the appearance changed with the geometry of the azide building blocks.
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