Photon Tools for Physical Chemistry 2019

Session

Photoionization spectroscopy II

11 Jan 2019, 10:50

Beatenberg, Switzerland

Conveners

Photoionization spectroscopy II

• Richard Tuckett (University of Birmingham, UK)

45. What a (True) Coincidence!

Prof. Bálint Sztáray (University of the Pacific)

11/01/2019, 10:50

Talk

In Photoelectron Photoion Coincidence Spectroscopy (PEPICO), a gas-phase molecule is ionized by a vacuum-ultraviolet photon and both the photoelectron and the photoion from a single neutral molecule are detected in coincidence. In threshold PEPICO (TPEPICO), photoions are collected in coincidence with only the near-zero kinetic energy electrons and one slice of the TPEPICO data gives the...

41. Photodissociation of Acetylacetone: Photoionization and Threshold Photoelectron Spectroscopy Reveal Much More Than OH Radicals

Dr David Osborn (Sandia National Laboratories)

11/01/2019, 11:15

Talk

The absorption of light by an organic molecule, and the subsequent pathways for energy transformation and release, are fundamental processes governing life on earth. Two of the most important electronic chromophores in organic systems are C=O bonds (carbonyl molecules) and C=C bonds (alkenes and polyenes). Carbonyl molecules, such as acetaldehyde (CH$_3$CHO) also have enol tautomers...

20. Dissociation Dynamics of Energy-Selected Ions with Threshold Photoelectron-Photoion Coincidence Velocity Imaging

Prof. Xiaoguo Zhou (Department of Chemical Physics, University of Science and Technology of China)

11/01/2019, 11:40

During the past ten years, a threshold photoelectron-photoion coincidence (TPEPICO) double imaging setup has been built at the Hefei Light Source (HLS) combining with tunable vacuum ultraviolet (VUV) synchrotron radiation, and applied on the state-of-the-art dissociative photoionization dynamics. The fundamental data, such as ionization energy and appearance potential, and the dissociation...

6. Pentadiynylidene, Methylpentadiynylidene and Dimethylpentadiynylidene: Threshold Photoelectron Spectroscopy of R$^1$-C$_5$-R$^2$ Carbon Chains

Mr Engelbert Reusch (Institute for Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg)

11/01/2019, 12:05

The three unsaturated and carbon-rich pentadiynylidenes of the composition R$^1$-C$_5$-R$^2$ are highly reactive biradicals or triplet carbenes in the electronic ground state of the neutral. Nevertheless, they occur as intermediates in harsh chemical environments. Particularly in the chemistry of interstellar medium [1], planetary atmospheres [2] and in combustion processes of fuel-rich...