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. Author manuscript; available in PMC: 2012 Aug 31.
Published in final edited form as: J Am Chem Soc. 2011 Aug 10;133(34):13236–13239. doi: 10.1021/ja2042589

Figure 2.

Figure 2

Effect of hydration on the phosphate vibrational frequency and Stark tuning rate. The frequency of the PO2− symmetric (A) and antisymmetric (B) stretch in room temperature DOPE/toluene is shown as a function of the amount of water added. (C) The Stark tuning rate measured for the antisymmetric stretch of DDHEPE/toluene as a function of the molar ratio of water to phospholipid. (D) A schematic representation of the reverse micelles used in these experiments.