Abstract:
The principle of chemistry in interphases comprises reactions between functionalized stationary phases and a mobile phase. It combines the advantages of homogeneous and heterogeneous catalysis, like high selectivity and simple separation. The modified stationary phase can be adjusted by varying the different sections, as carrier, linker and active center. Ferrocene was used as a model redox-active substance, representing the active center. The influence of the linker system and the connection between linker and active center was determined by measuring the changes in the redox activity of ferrocenoylamides and (ferrocenylmethyl)amines. The bonding of the linker to the carrier was realized using unsaturated carboxylic acids in a photochemical or microwave assisted thermal reaction forming a Si-C-bond. The mechanism of the photochemical hydrosilylation was investigated using a special 13C-labeled 8-Nonenoic acid. The microwave assisted thermal reaction proofed to be an alternative route for bonding the linker to the carrier.