个人简介

B.S., Haverford College, 1974 Ph.D., University of Chicago, 1980 NSF and Hertz Foundation Postdoctoral Fellow Postdoctoral Fellow, University of Chicago, 1980-81 Rice University, 1981-1984

研究领域

PHYSICAL CHEMISTRY

Research in Professor Morses group is directed toward understanding the chemical bonding and electronic structure in metallic and semiconductor systems by detailed spectroscopic investigations. This research makes extensive use of laser spectroscopy through laser-induced fluorescence, resonant two-photon ionization, and photodissociation action spectroscopy of mass-selected cations. In many of these experiments, metal or semiconductor atoms are ablated from an appropriate target in the throat of a pulsed supersonic expansion by a focused laser pulse. Condensation of the atomic species then occurs in the high pressure region downstream from the point of vaporization. Expansion into vacuum cools the molecules to a few degrees Kelvin, then isolates them from further collisions as the pressure drops. Farther downstream, a variety of spectroscopic experiments are performed, aimed at understanding the molecular structure (both electronic and geometrical) of the small metal and semiconductor molecules. One spectroscopic technique used is resonant two-photon ionization spectroscopy (R2PI). In this method, a tunable dye laser is scanned in conjunction with a fixed frequency ultraviolet laser. The ultraviolet laser wavelength is chosen so that it cannot ionize the ground state of the molecule with a single photon, but the combination of one dye laser photon plus one UV laser photon is sufficient for ionization. Under these conditions an enhancement of the ion signal is observed in a mass spectrometer whenever the dye laser is resonant with a molecular absorption. By detecting the ions in a mass spectrometer we can identify the mass of the absorber. In these spectroscopic studies it is possible to measure vibrational frequencies, bond lengths, electronic state symmetries, and bond strengths of many novel species. Among the molecules first studied in our group are Si2N, MoC, PdC, NbCr, YCu, Ti2, GaAs, LiCu, AlNi, Au3, Al3, Bi3, and CuAgAu. More recently we have recorded electronic spectra of unsaturated organometallic molecules including CrCH3, CrCCH, and NiCH3. These are among the most complex unsaturated transition-metal ligand molecules e

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Brugh, D. J.; Morse, M. D. "Rotational analysis of the 301 band of the A 6??+ - 6??+ System of CrCCH,". Chem. Phys.2014, 141, 064304/1-9. Matthew, D. J.; Morse, M. D. "Resonant two-photon ionization spectroscopy of jet-cooled UN: Determination of the ground state," J. Chem. Phys.2013, 138, 184303/1-/7. Krechkivska, O.; Morse, M. D. "Electronic Spectroscopy of Diatomic VC," J. Phys. Chem. A2013, 117, 13284-91. Krechkivska, O.; Morse, M. D. "ZrFe, A Sextuply-Bonded Diatomic Transition Metal?," J. Phys. Chem. A2013, 117, 992-1000. Garcia, M. A.; Vietz, C.; Ruip??rez, F.; Morse, M. D.; Infante, I. "lectronic spectroscopy and electronic structure of diatomic IrSi," J. Chem. Phys.2013, 138, 154306/1-9. Garcia, M. A.; Morse, M. D. "Electronic Spectroscopy and Electronic Structure of Copper Acetylide, CuCCH," J. Phys. Chem. A2013, 117, 9860-70. Krechkivska, O.; Morse, M. D.; Kalemos, A.; Mavridis, A. "Electronic spectroscopy and electronic structure of diatomic TiFe," J. Chem. Phys.2012, 137, 054302/1-12. Morse, M. D.; Maier, J. P. "Detection of nonpolar ions in 2??3/2 states by radioastronomy via magnetic dipole transitions,"Astrophys. J.2011, 732, 103/1-/5.ffix