ZEKE spectroscopy of the AgNH3 complex

Abstract The vibrational structure of the Ag + NH 3 complex has been investigated by single-photon zero kinetic energy (ZEKE) photoelectron spectroscopy. The intermolecular stretching mode with a frequency of 375 cm −1 is measured from the ZEKE spectrum, whereas the intermolecular bending vibration is not observed, in contrast to the A 2 E 1/2 – X 2 A 1 electronic spectrum of the neutral AgNH 3 complex [Miyawaki et al., Chem. Phys. Lett. 302 (1999) 354]. The ionization potential of AgNH 3 was determined to be 47580 cm −1 (5.899 eV).