Die Natur als Vorbild: Die Bildung spezifischer Wasserstoffbrücken, eine wesentliche Grundlage für Prozesse in lebenden Organismen, lässt sich im Grenzgebiet von supramolekularer Chemie und homogener Katalyse gezielt einsetzen, so bei der Synthese neuartiger Elastomere (siehe schematische Darstellung), deren Eigenschaften auf starken intermolekularen Wasserstoffbrücken beruhen.

No abstract

The synthesis of new heterocyclic oligo(phenylene) analogues based on soluble, nonaggregating 1,2-diazines is reported. Improved palladium-catalyzed reductive coupling methods were developed to allow for the preparation of large quantities of iptycene-derived bipyridazines and biphthalazines, and the controlled synthesis of well-defined oligomers up to sexipyridazine. Crystallographic, spectroscopic, and computational evidence indicate that in these analogues, hindrance at the ortho position is relaxed relative to poly(phenylenes). The resulting building blocks are promising for incorporation in conjugated electronics materials, and as new iptycene-derived ligands for transition metals.

No abstract

No abstract