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Cover Picture: Energy Transfer in Single Hydrogen-Bonded Water Molecules (ChemPhysChem 6/2005)
The cover picture shows a single water molecule that is hydrogen-bonded (thin blue lines) to two neigboring acetone molecules. Water can enter an apolar solvent such as CCl4 if it is embedded by amphiphilic acetone molecules. In their Article on page 1146 Bakker et al. show by femtosecond mid-infrared spectroscopy that the water molecules enter the apolar matrix in the form of particularly hydrogen-bonded complexes with acetone. The O-H stretching vibrations of the water molecule have been excited by an infrared laser pulse. Because the O-H vibrations of the water molecule are in resonance, the vibration is delocalized over the molecule.