Abstract
A chemisorbed polyfunctional molecule containing both a S atom and a Cl atom, (2-chloroethylethyl sulfide, 2-CEES) is able to abstract electrons which reside near the bottom of the conduction band in TiO 2. By using analogous model compounds containing either the S moiety or the Cl moiety, it is found that electron transfer from TiO 2 occurs only into the molecule containing the Cl moiety. This suggests that a specific electron transfer pathway involving the Cl atom is involved in the electron transfer interaction of 2-CEES with TiO 2. Small coverages of adsorbed electron acceptor molecules are found to cause electron depletion of individual TiO 2 crystallites.
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