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Excited-State Intermolecular Proton Transfer Reactions of 7-Azaindole(MeOH)n (n = 1 - 3) Clusters in the Gas phase: On-the-Fly Dynamics Simulation

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons58410

Barbatti,  Mario
Research Group Barbatti, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Daengngern, R., Kungwan, N., Wolschann, P., Aquino, A. J. A., Lischka, H., & Barbatti, M. (2011). Excited-State Intermolecular Proton Transfer Reactions of 7-Azaindole(MeOH)n (n = 1 - 3) Clusters in the Gas phase: On-the-Fly Dynamics Simulation. The Journal of Physical Chemistry A, 115(49), 14129-14136. doi:10.1021/jp2059936.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-A3AE-9
Abstract
Ultrafast excited-state intermolecular proton transfer (PT) reactions in 7-azaindole(methanol)n (n = 1-3) [7AI(MeOH)n=1-3] complexes were performed using dynamics simulations. These complexes were first optimized at the RI-ADC(2)/SVP-SV(P) level in the gas phase. The ground-state structures with the lowest energy were also investigated and presented. On-the-fly dynamics simulations for the first-excited state were employed to investigate reaction mechanisms and time evolution of PT processes. The PT characteristics of the reactions were confirmed by the nonexistence of crossings between Sππ* and Sπσ* states. Excited-state dynamics results for all complexes exhibit excited-state multiple-proton transfer (ESmultiPT) reactions via methanol molecules along an intermolecular hydrogen-bonded network. In particular, the two methanol molecules of a 7AI(MeOH)2 cluster assist the excited state triple-proton transfer (ESTPT) reaction effectively with highest probability of PT.