Dynamics of infrared photodissociation of methanol clusters in zeolites and in solution
We have investigated the dynamics of the OH stretch vibration of clustered (hydrogen-bonded) methanol molecules in solution and in Nazeolites with time-resolved (picosecond) pumpprobe infrared spectroscopy. It is shown that in both cases, after resonant IR excitation, vibrational relaxation occurs by breaking the hydrogen bond between the methanol molecules. This process occurs much faster in solution (T1< 3 ps) than inside the zeolite (T1 = 10 ± 3 ps). A second remarkable difference is that whereas in solution a rapid hydrogen-bond reassociation occurs (tr = 25 ± 3 ps), in the zeolite this process takes considerably longer (tr >> 2 ns).
|Journal||J. Phys. Chem.|
Bonn, M, Bakker, H.J, Kleyn, A.W, & van Santen, R.A. (1996). Dynamics of infrared photodissociation of methanol clusters in zeolites and in solution. J. Phys. Chem., 100, 15301–15304. doi:10.1021/jp961095n