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Annu Rev Phys Chem. 2003;54:367-96. Epub 2002 Mar 21.

Theory of dipole-bound anions.

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Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA.


The problem of the binding of an excess electron to polar molecules and their clusters has long fascinated researchers. Although excess electrons bound to such species tend to be very extended spatially and to have little spatial overlap with the valence electrons of the neutral molecules, inclusion of electron correlation effects is essential for quantitatively describing the electron binding. The major electron correlation contribution may be viewed as a dispersion interaction between the excess electron and the electrons of the molecule or cluster. Recent work using a one-electron Drude model to describe excess electrons interacting with polar molecules is reviewed.

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