Cross-π-conjugated enediyne with multitopic metal binding sites
Djawed Nauroozi1,2, Benjamin Wurster1, Rüdiger Faust1
1Institute for Chemistry, CINSaT - Centre for Interdisciplinary Nanostructure Science and Technology, University of Kassel Heinrich-Plett-Str. 40 34132 Kassel Germany r.faust@uni-kassel.de.
Abstract:
The synthesis of an enediyne molecule functionlized with different metal coordination sites in a cross-π-conjugated fashion is reported. Using Pd-mediated cross-coupling reactions, 2,2'-bipyridine units were attached at the periphery of diazafluorenemethylidene to obtain a multitopic ligand. UV-vis spectrosopic investigations along with electrochemical analyses reveal electronic communication along the conjugated path reflected in red-shifted absorption spectra and shifts of reduction potentials. The properties of the ligand could be manipulated by coordinating [Ru(bpy)2]2+ fragments at all three coordination spheres of the molecule while the different complexing imine moieties serve as possible coordination sites for various metal centres.
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