Hydrogen-bond network, slow relaxation

In the benzene-methanol case, the first inertial component exhibits similar dependence on xp as in acetonitrile mixtures (see Fig. 2.b). The same is still true at intermediate times around 1-2 ps and a similar picture as in Fig. 3.a. can be observed at x/ >=0.2.. However, the addition of methanol to benzene gives rise to a very long decay time (see Fig. 2.b), which may be associated with the slow hydrogen bond network relaxation of methanol. It should be noted that no significant change of the hydrogen bond from methanol to the coumarin carbonyl group is observed between the S0 and S states. 

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