We present optical spectroscopy and persistent spectral hole-burning data of oxazine-1 embedded in the nanometer lengthscale pores of inorganic hosts, which are filled with solvents like ethanol and 3-methyl-pentane as coadsorbate. Absorption spectra, hole burning efficiency and hole filling allow to determine the location of the chromophore within the pores and give information about the structure of the local solvation shell. Spectral diffusion reflects the modified spatial distribution of the two-level systems of the amorphous phase and allows an estimation of the interaction length between chromophore and two-level system.