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Molecular clusters are aggregates of molecules such as NH3, H2O, CO2, etc. weakly bound by hydrogen bonding or the van der Waals force. When they are charged by photoionization or landing of slow electrons, the electric polarization due to the additional charge plays an important role in binding. Such a situation is quite similar to that of rare-gas clusters mentioned in the previous chapter. Studies of molecular clusters are of much interest from a chemical point of view: Water clusters may be viewed as a microscopic system relevant to solvation. Ammonia clusters and their photochemical products are interesting in intersteller chemistry, as ammonia is an important constituent of the atmospheres of some planets.
KeywordsElectron Affinity Water Cluster Excess Electron Molecular Cluster Cluster Anion
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- 7.19M. Matsuzawa: In Rydberg States of Atoms and Molecules, ed. by R.F. Stebbings, F.B. Dunning (Cambridge Univ. Press, London 1983) p.267Google Scholar