Bromosubstituted norbornadienes and their reversible photolytic transformation to quadricyclanes

Bromosubstituted norbornadienes and their reversible photolytic transformation to quadricyclanes

Diaryl-substituted norbornadienes with red-shifted absorption for molecular solar thermal energy storage.

Red-shifting the absorption of norbornadienes (NBDs), into the visible region, enables the photo-isomerization of NBDs to quadricyclanes (QCs) to be driven by sunlight. This is necessary in order to utilize the NBD-QC system for molecular solar thermal (MOST) energy storage. Reported here is a study on five diaryl-substituted norbornadienes. The introduced aryl-groups induce a significant red-s...

compactifications and representations of transformation semigroups

this thesis deals essentially (but not from all aspects) with the extension of the notion of semigroup compactification and the construction of a general theory of semitopological nonaffine (affine) transformation semigroup compactifications. it determines those compactification which are universal with respect to some algebric or topological properties. as an application of the theory, it is i...

Graph Transformation Meets Reversible Circuits: Model Transformation and Optimization

Reversible circuits provide the subject of a new promising direction of circuit design. Reversible circuits are cascades of reversible gates specifying bijective functions on Boolean vectors. As one encounters quite a variety of reversible gates in the literature, there are many classes of reversible circuits. Two main problems are considered: (1) How can circuits of one class be transformed in...

Biological and Photolytic Transformations Fast and Effective Transformation of Toxaphne by Superreduced Vitamin B12 and Dicyanocobalamin

The chloropesticide toxaphene (Camphechlor, Melipax) has been used in high quantities since 1945 . Toxaphene has been classified as a persistent organohalogen pollutant (POP) and belongs to the “dirty dozen” . Due to its heavy use in the 1960s and 1970s, several environmental compartments were significantly contaminated with toxaphene. For instance, concentrations in polluted areas could exceed...