Photoionization and photoelectron spectroscopy of alkali halide monomers, dimers, and trimers

Journal Article · Fri Jan 01 04:00:00 EST 1982 · ACS Symp. Ser.; (United States)

DOI:https://doi.org/10.1021/bk-1982-0179.ch019· OSTI ID:5510758

Berkowitz, J; Batson, C H; Goodman, G L

The ultraviolet photoelectron spectra of diatomic alkali halide molecules are reviewed and interpreted. Data for lithium halide dimers, Li/sub 2/X/sub 2/, are presented and it is shown that the dimers have significantly larger ionization thresholds than the corresponding monomers. Some historical controversies regarding the presence of dimers and their ionization energies are clarified. Photoionization mass spectrometry is used to determine the adiabatic ionization potential of lithium chloride trimer, in order to probe the trend of I.P. with cluster size. The predictions of Hartree-Fock, X..cap alpha.. and ionic model calculations on this point are presented. Finally, the very weak stability of M/sub 2/X/sub 2/+ and M/sub 3/X/sub 3/+ and the high stability of M/sub 2/X+ and M/sub 3/X/sub 2/+ are discussed, and conjectures are made regarding the geometric structure of these entities. 13 figures, 5 tables.

• Research Organization: Argonne National Lab., IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5510758
• Journal Information: ACS Symp. Ser.; (United States), Journal Name: ACS Symp. Ser.; (United States) Vol. 179; ISSN ACSMC
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
ALKALI METALS
CHLORIDES
CHLORINE COMPOUNDS
DIMERS
ELECTRON SPECTROSCOPY
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
IONIZATION
IONIZATION POTENTIAL
LITHIUM CHLORIDES
LITHIUM COMPOUNDS
LITHIUM HALIDES
LITHIUM HYDRIDES
METALS
MONOMERS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
SPECTROSCOPY