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- W2032744420 abstract "The energetics, dynamics, and infrared spectroscopy of the shared proton in different chemical environments is investigated using molecular dynamics simulations. A three-dimensional potential energy surface (PES) suitable for describing proton transfer between an acceptor and a donor oxygen atom is combined with an all-atom force field to carry out reactive molecular dynamics simulations. The construction of the fully dimensional PES is inspired from the established mixed quantum mechanics/molecular mechanics treatment of larger systems. The “morphing potential” method is used to transform the generic PES for proton transfer along an O···H+···O motif into a three-dimensional PES for proton transfer in protonated diglyme. Using molecular dynamics simulations at finite temperature, the gas phase infrared spectra are calculated for both species from the Fourier transform of the dipole moment autocorrelation function. For protonated diglyme the modes involving the H+ motion are strongly mixed with other degrees of freedom. At low temperature, the O···H+···O asymmetric stretching vibration is found at 870 cm-1, whereas for H5O2+ this band is at 724 cm-1. As expected, the vibrational bands of protonated diglyme show no temperature dependence whereas for H5O2+ at T = 100 K the proton transfer mode is found at 830 cm-1, in good agreement with 861 cm-1 from very recent molecular dynamics simulations." @default.
- W2032744420 created "2016-06-24" @default.
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- W2032744420 date "2007-02-13" @default.
- W2032744420 modified "2023-09-23" @default.
- W2032744420 title "Investigating the Relationship between Infrared Spectra of Shared Protons in Different Chemical Environments: A Comparison of Protonated Diglyme and Protonated Water Dimer" @default.
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- W2032744420 doi "https://doi.org/10.1021/jp065323h" @default.
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