Novel photoactive transition metal catalysts for the UV-Light-Triggered Metathesis Polymerization of Functional Monomers

本项目的目标是合成新型的铼基金属配合物，作为复分解催化剂的光活性前体。这些有机金属化合物应基于具有额外配体的Ru-N-杂环卡宾，所述额外配体可在用UV光（λ < 300 nm）照射时选择性地去除。足够重要的是，与（少数）现有系统相比，这些前体化合物在高达45°C的温度下和可见光（> 300 nm）的照射下应保持稳定。通过λ < 300 nm的光活化的复合物应暴露于应变烯烃如官能降冰片-2-烯和环辛烯以形成开环易位聚合（ROMP）活性催化剂。互补地，活化的络合物应与各种官能的1，6-庚二炔反应以形成环聚合活性物质，从而获得半导体和导电物质。应进行活化机制的研究以及动力学测量。最后，新的系统将用于创建x/y-分辨的表面固定的聚合物刷以及x/y-分辨的表面结合的（半）导电聚合物层和电线。这些应用于实现生物分析设备，例如用于DNA分析。导电层应用于（半）导电聚合物层的构造。

This project aims on the synthesis of novel ruthenium-based metal complexes that shall serve as photo-active precursors for metathesis catalysts. These organometallic compounds shall be based on Ru-N-heterocyclic carbenes with additional ligands that can be selectively removed upon irradiation with UV-light (¿ < 300 nm). Important enough and in contrast to (few) existing systems, these precursor compounds shall be stable at temperatures up to 45°C and to irradiation with visible light (¿ > 300 nm). Complexes activated by light with ¿ < 300 nm shall be exposed to strained olefins such as functional norborn-2-enes and cyclooctenes to form ring-opening metathesis polymerization (ROMP) active catalysts. Complementary, the activated complexes shall be reacted with various functional 1,6-heptadiynes to form cyclopolymerization active species to gain access to semiconducting and conducting species. Investigations on the mechanism of activation as well as kinetic measurements shall be carried out. Finally, the novel systems shall be used to create x/y-resolved surface-immobilized polymer brushes as well as x/y-resolved surface-bound (semi-) conducting polymers layers and wires. These shall be used for the realization of bioanalytic devices, e.g. for DNA analysis. Conductive layers shall be used for the construction of (semi-) conducting polymer layers.