High-resolution anion photoelectron spectra are reported for the group 4 metal dioxide clusters Ti2O4- and Zr 2O4-. Slow photoelectron velocity-map imaging (SEVI) spectroscopy of cryogenically cooled, mass-selected anions yields photoelectron spectra with submillielectronvolt resolution, revealing extensive and well-resolved vibrational progressions. By comparison of the spectra with Franck-Condon simulations, we have identified the C2v and C 3v isomers as the ground states of Ti2O4 - and Zr2O4- anions, respectively. Minor contributions from the C2h isomer of Ti2O 4- and the C2v isomer of Zr2O 4- are also seen. The SEVI spectra yield upper bounds for the adiabatic detachment energies, as well as vibrational frequencies for various modes of the neutral Ti2O4 and Zr 2O4 species.
|Original language||English (US)|
|Number of pages||10|
|Journal||Journal of the American Chemical Society|
|State||Published - May 14 2014|
All Science Journal Classification (ASJC) codes
- Colloid and Surface Chemistry