Faithin Omaha eBook Collection

Download or read book Photoionization and Photoelectron Studies of Transition-metal Compounds written by Huang Huang and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Photoionization efficiency (PIE) and pulsed field ionization-photoelectron (PFI-PE) measurements of transition-metal-containing molecules have been conducted. The cold gaseous transition-metal-containing molecules were generated by a laser ablation supersonically cooled beam source. The CoC/CoC+, TiO/TiO+ and VN/VN+ systems were studied by using two-color UV-VIS resonance enhanced photoionization scheme. By exciting the molecules to single rotational levels of the intermediate state using a VIS dye laser prior to UV laser photoionization, we have obtained rotationally resolved PFI-PE spectra, allowing unambiguous rotational assignments and accurate determinations of energetic and spectroscopic constants. The TiO2/TiO2+ system was studied by using a VUV laser system. The recorded PIE and PFI-PE spectra also yields highly precise ionization energy and vibrational constants. We have also conducted theoretical calculations for these molecules by using state-of-the-art ab initio quantum calculations at the CCSDTQ/CBS level of theory. The energetic and spectroscopic results obtained in these studies have been compared with the theoretical results and are invaluable for benchmarking the theoretical calculation.