Western Michigan ACS

Ott Lecture Research Talk: Prof. Daniel Neumark

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Friday April 13, 2018 1:00 PM - 2:00 PM
Pere Marquette Room, Allendale Campus, Grand Valley State University  (map)

Friday April 13, 2018 1:00 PM - 2:00 PM

Title: Studies of radicals, catalytic intermediates, and transition states by slow electron velocity-map imaging of cryogenically cooled anions (cryo-SEVI)

Abstract: Slow-electron velocity-map imaging of cryogenically cooled anions (cryo-SEVI) is a high resolution variant of anion photoelectron spectroscopy that yields spectra of complex species with resolution as high as 1-2 cm-1. This resolution is achieved by trapping anions in an octopole trap in which buffer-gas cooling brings their temperature down to approximately 10 K. The anions are then extracted from the trap, mass-selected, and photodetached. The resulting photoelectrons are analyzed with velocity-map imaging electron optics set up to selectively collect slow electrons. This technique reveals extensive vibrational structure associated with the neutral species generated by photodetachment, and enables one to investigate species that were previously spectroscopically intractable. Results will be presented for free radicals, bare and complexed metal oxide clusters, and transition state species associated with benchmark unimolecular and bimolecular reactions.

Full information including parking details available at https://www.gvsu.edu/chem/arnold-c-ott-lectureship-in-chemistry-94.htm

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