Topology Guided Design of Multi-Photon Absorption in CrystallineCoordination Networks

晶体配位网络化合物（CCN）的自组装性质与网状合成的拓扑原理相结合，允许有机分子（连接体）在空间中的特定排列。该材料的结晶性质使得在分子尺度上构建单元之间（即有机连接体之间）的距离和角度得到精确定义。这对于理解和设计CCN的光物理性质特别重要。分子间的相互作用决定了生色团阵列的光学响应，例如天然光合系统中的捕光蛋白。有机生色团连接体的基本光物理性质以及这些连接体之间的协同作用决定了整个组装体的功能。该项目的目标是获得对多光子活性CCN的结构-性能关系的基本理解，并为此类高性能材料制定设计规则。前景包括通过双光子点激励来提高光数据存储器件（如CD、DVD）的数据存储密度。有针对性的合成，复杂的材料表征以及尖端的多维光谱学将结合起来。

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.