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This thesis deals with the femto- to picosecond dynamics of phospholipid-water interfaces as seen by time-resolved vibrational spectroscopy. Phosphate-water interactions are of general importance for the structure and function of biomolecules like DNA and for the formation of lipid cell membranes. Furthermore, the transport of molecules and ions as well as cell communication are influenced by the properties of water in the vicinity of the charged phosphate groups that significantly differ from the ones of the bulk structure. In order to study phosphate-water interactions, phospholipid reverse micelles are employed as model systems. Their structure closely resembles the one of vesicles which are highly relevant for biochemical processes in the cell, allowing for the ultrafast dynamics of confined water in those systems to be deduced.