Development of a polystyrene sulfonate/silver nanocomposite with self-healing properties for biomaterial applications

A silver polystyrene sulfonate polyelectrolyte was synthesized, showing a spontaneous reduction of silver ions to silver nanoparticles over a period of approximately 1 month. A follow-up of the nanoparticle formation via scanning electron microscopy (SEM) reveals migration of the nanoparticles towards the cracks of the polymer over time, leading to a self-healing process of the nanocomposite. Antibacterial tests show excellent antibacterial activity of our compound, which allows us to use this compound e.g. for external medical applications.     

On the Generalization of the Hébraud–Lequeux Model to Multidimensional Flows

In this article we build a model for multidimensional flows in soft glassy materials. The construction of the model is based on the ideas of Hébraud and Lequeux, but care is taken to build a frame-indifferent multidimensional model. The main goal of this article is to prove that the methodology we have developed to study the well-posedness and the glass transition for the original Hébraud–Lequeux model can be successfully generalized. Thus, this work may be used as a starting point for more sophisticated studies in the modeling of general flows of glassy materials.     

Straightforward access to enantioenriched pyrazyl alcohols using chiral organomagnesiates

The clean iodine-metal exchange of iodopyrazine and subsequent enantioselective addition of the intermediate pyrazyl magnesiate to aldehydes using ((R,R)-TADDOLate)Bu₂MgLi₂ is reported. New chiral pyrazylalcohols were obtained in enantiomeric excesses of up to 90%.     

Copper catalyzed tandem conjugated borylation–aldol reaction

We investigated the tandem conjugated borylation–aldol reaction catalyzed by copper complexes. After identification and optimisation of the catalytic system, the scope of the reaction was evaluated and the diastereoselectivity was studied on both linear and cyclic activated alkenes. Finally, the use of some selected borylated aldol adducts in two classical transformations was investigated.