Different molecular titanium alkoxides were investigated as precursors for the synthesis of thin to ultra-thin TiO2 ceramic films. The films were prepared by the Langmuir-Blodgett technique. Therefore, the precursor was dissolved in CHCl3 and subsequently spread on water, aqueous acetic acid and aqueous acetylacetone as the subphase. Hydrolysis of the titanium alkoxides, namely Ti(OR)(4-x)(OR')(x) with x = 0 (R = n-C4H9 or n-C9H19) and x = 2 (R = n-C4H9 and R' = 2, 4 pentanedionate) and [(RO)(2)Ti-O-](n) with R = n-C4H9 was performed at the air-water interface. This reaction can be considered as a two-dimensional sol-gel-process. The surface-pressure-area (pi-A) isotherms as well as the influence of the molecular structure of the precursor on the morphology of the resulting condensation products (gels) are discussed. Pyrolysis of the transferred gels under oxygen atmosphere up to 700 degrees C gives the desired TiO2-layers.