PULSED-FIELD IONOZATION ELECTRON SPECTROSCOPY OF LANTHANIDE (Lu, Gd) BENZENE COMPLEXES
Loading...
Date
2010
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Over the last 25 years, organometallic chemistry of $f$ elements has attracted considerable attentions of both experimentalists and theoreticians. We have recently succeeded in producing Ln-benzene (Ln $=$ Lu, Gd) complexes in laser-vaporization supersonic molecular beams and in measuring their vibronic spectra using single-photon pulsed field ionization-zero electron kinetic energy (PFI-ZEKE) spectroscopy. We obtained for the first time the adiabatic ionization energy (AIE) and metal-benzene vibrational frequencies. The AIE of the Lu-benzene complex is 44461 (5) cm$^{-1}$, and the Lu-benzene stretching frequencies are 204 and 270 cm$^{-1}$ in the neutral and ion, respectively. For the Gd-benzene complex, its AIE is 40830 (5) cm$^{-1}$, and the metal-ligand stretching frequencies of the neutral and ionic species are 256 and 298 cm$^{-1}$. We will discuss the electronic transitions involved in the PFI-ZEKE spectra of the two complexes by combining the experimental measurements with quantum chemical calculations and spectral simulations.
Description
Author Institution: Department of chemistry, University of Kentucky, Lexington, KY 40506-0055