Femtosecond Electron Transfer from the Excited State of Chemically Anchored Chromophores into the Empty Conduction Band of Nanocrystalline Sponge-like TiO 2 Films Presented at the “Twelfth International Conference on Photochemical Conversion and Storage of Solar Energy”, Berlin, August 9–14, 1998. E-mail of corresponding author: [email protected].