First ionization potential of platinum by mass-selected double-resonance field-ionization spectroscopy

Abstract
Mass-selected, double-resonance, field-ionization spectroscopy is used to determine the first ionization potential of the three abundant isotopes of platinum. By fitting up to 38 member of s and d Rydberg series of ionization potentials of Pt194, Pt195, and Pt196 are determined to be 72 256.6±0.9 cm1 (8.958 68±0.000 11 eV). This yields a revised value of 27 580±320 cm1 (3.42±0.04 eV) for the bond strength of platinum dimercation Pt2+.

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