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Ru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以Ru-N-杂环卡宾为基础，并带有附加的配体，可在紫外光(300 Nm)照射下选择性地移除这些配体。这些前体化合物非常重要，与(少数)现有体系不同，它们在45°C以下的温度和可见光(300 Nm)照射下都应该是稳定的。用300 nm的光活化的络合物应暴露在张力的烯烃中，如功能上的降冰片-2-烯和环辛烯，形成开环歧化聚合(ROMP)活性催化剂。作为补充，活化的络合物应与各种官能化的1，6-庚二炔反应形成环聚活性物种，从而获得半导体和导电物种。应对活化机理进行研究并进行动力学测量。最后，新系统将用于制造x/y分辨率的表面固定聚合物刷子以及x/y分辨率的表面结合(半)导电聚合物层和导线。这些应用于实现生物分析设备，例如用于DNA分析。应使用导电层来建造(半)导电聚合物层。

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.