Abstract
Dendrimers of various generations were synthesized by the divergent method. Starting from various amine cores (G0a, G0b, G0c) the generations were built by reaction of the amine with acrylnitrile followed by hydrogenation with DIBAL-H. Treatment with salicylaldehyde creates a fivefold coordination sphere for iron in the molecular periphery. The resulting multinuclear coordination compounds are investigated by Mossbauer spectroscopy.
Highlights
Dendrimers represent a novel type of polymeric materials that have been of increasing interest in recent years revealing applications in supramolecular chemistry, nanoscience, medicine and catalysis [1]
The resulting multinuclear coordination compounds are investigated by Mössbauer spectroscopy
We focused on divergent approach, where the molecule grows from the core to the periphery and whereas convergent synthesis first builds up the dendrons called arms, wich were connected in a merging step to the core fragment
Summary
Dendrimers represent a novel type of polymeric materials that have been of increasing interest in recent years revealing applications in supramolecular chemistry, nanoscience, medicine and catalysis [1]. These macromolecules are defined as highly branched, spherical and monodisperse molecules composed of monomers that spread from a central core [2]. The extraordinary topology of the dendrimers was used to yield multinuclear iron(III) complexes by functionalizing the terminal amine groups and subsequently to observe the influence of the generation growth on the spin state of the resulting metal complex with Mössbauer spectroscopy [3,4,5,6,7].
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