Abstract
The size-selective vibrational spectrum of Si4Xe+ in the 240–500cm−1 range has been recorded using infrared (IR) multiple photon dissociation spectroscopy. Comparison to linear IR absorption spectra of Si4+ and Si4Xe+ calculated using density functional theory including dispersion corrections reveals an important influence of the Xe ligand on the structure of the cluster, involving significant charge transfer and formation of an incipient chemical Si–Xe bond with De = 0.3eV.
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