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. Author manuscript; available in PMC: 2014 Dec 19.
Published in final edited form as: J Phys Chem B. 2013 Dec 10;117(50):16236–16248. doi: 10.1021/jp410720y

Figure 3.

Figure 3

Normalized electric field autocorrelation functions of the C=O vibration on acetophenone in three different solvents: (A) dibutyl ether; (B) dimethyl sulfoxide; (C) water. Black dots represent the autocorrelation data points, and the red trace represents a fit to a double exponential decay. In all cases, the data could not be fit well to a single exponential decay. Fit parameters for all solvents are given in Table 3. The solvents examined share a characteristic time constant for fast dephasing (~100 fs), but have different time constants for the slow dynamics. Dibutyl ether is the only solvent with a significant offset, consistent with the 100 ps trajectory not reflecting the true ensemble average (see footnote d in Table 1).