Topology Guided Design of Multi-Photon Absorption in CrystallineCoordination Networks

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The self-assembling nature of crystalline coordination networkcompounds (CCNs) combined with the topological principles ofreticular synthesis allow for a specific arrangement of organicmolecules (linkers) in space. The crystalline nature of the materialsyields a precise definition of distances and angles between thebuilding blocks on the molecular scale, i.e. between the organiclinkers. This aspect is of particular importance for understanding anddesigning photo-physical properties of CCNs. Intermolecularinteractions define the optical response of chromophore arrays, asexemplified by the light harvesting proteins in natural photosyntheticsystem. The fundamental photo-physical properties localized onindividual organic chromophore linkers and the cooperative effectsbetween these linkers contribute to the functionality of the wholeassembly. The project´s objective is obtaining fundamentalunderstanding of structure-property relationships of multi-photonactive CCNs and developing design rules for such high performingmaterials. Perspectives include increasing data storage densities inoptical data storage devices (e.g. CD, DVD) by two-photon pointexcitation. Targeted synthesis, sophisticated materialscharacterization as well as cutting-edge multidimensionalspectroscopy will be combined.