Synthesis and ligand binding properties of triptycene-linked porphyrin arrays |
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Authors: | Eimear M FinniganRegis Rein Nathalie SolladiéKatja Dahms Daniel CG GötzGerhard Bringmann Mathias O Senge |
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Institution: | a School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity College Dublin, Dublin 2, Ireland b Groupe de Synthése de Systémes Porphyriniques, Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France c Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany |
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Abstract: | Multiporphyrin arrays are a complex class of molecules with numerous potential applications in energy transfer, photomedicine, and light harvesting. We have developed a facile/versatile route to a class of triptycene-linked porphyrin arrays via both Suzuki and Sonogashira cross-coupling methods, which makes use of the rigid three-pronged orientation of triptycene to construct trimeric porphyrin arrays linked either in the meso or β-position with various linker groups. In order to understand the properties of these potential antenna systems and probe their potential applications, the coordination behavior of zinc(II) derivatives with mono- and bidentate N-donor ligands was investigated. Depending on ligand concentration, both one- and two-point binding was observed with a bidentate ligand. Also/in addition, different cavity sizes, obtained by the use of different linker groups, resulted in differences in the binding properties of each trimeric system. |
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Keywords: | Porphyrins Triptycenes Suzuki coupling Sonogashira coupling Ligand binding Antenna systems |
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