The interaction of flames or hot intermediate reaction products with cooled walls of combustion chambers often results in quenching processes. These quenching processes are substantially involved in the emission of unburned hydrocarbons or carbon monoxide. These interactions take place in the boundary layer and are characterised by their high level of complexity. The aim of this work consists of the experimental investigation of these near wall reaction phenomena. For this purpose the following spectroscopic methods were applied: thermographic phosphors for the determination of surface temperatures, the coherent anti-Stokes Raman-spectroscopy for the gas phase thermometry and laser-induced fluorescence spectroscopy for the quantitative measurement of the carbon monoxide concentration in the gas phase and in the direct vicinity of the wall. As one of the emphases of this thesis consists in the composition, enhancement and characterisation of these methods, in a first step the fundamentals and the main principles of the spectroscopic methods are briefly summarised (chap. 2), before the three diagnostics are discussed (chap. 3, 4, 5). Combined measurements on a generic impinging flame burner-system are presented in chapter 6. In order to describe the complete flame-wall-interaction of the investigated object, heat fluxes in the laminar boundary layer and heat fluxes across the wall are determined and compared. These quantitative datasets are completed by the relative intensities of the chemiluminescent species C2. The last chapter (chap. 7) summarises the thesis and provides suggestions for future research in this field.