Static vs dynamic DFT prediction of IR spectra of flexible molecules in the condensed phase: The
Daria Ruth Galimberti1, Alberto Milani1, Marie-Pierre Gaigeot2
1Politecnico di Milano - Dip. Chimica, Materiali, Ing. Chimica "G. Natta", Piazza Leonardo da Vinci 32, 20133 Milan, Italy.
Abstract:
First-principles molecular dynamics (FPMD) simulations in the framework of Density Functional Theory (DFT) are carried out for the prediction of the infrared spectrum of the fluorinated molecule ClCF2CF(CF3)OCF2CH3 in liquid and gas phase. This molecule is characterized by a flexible structure, allowing the co-existence of several stable conformers, that differ by values of the torsional angles. FPMD computed spectra are compared to the experimental ones, and to Boltzmann weighted IR spectra based on gas phase calculations.
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