Search Results - "Powis, Ivan"

Vibrationally induced inversion of photoelectron forward-backward asymmetry in chiral molecule photoionization by circularly polarized light by Garcia, Gustavo A., Nahon, Laurent, Daly, Steven, Powis, Ivan

“…Electron–nuclei coupling accompanying excitation and relaxation processes is a fascinating phenomenon in molecular dynamics. A striking and unexpected example…”
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Imaging photoelectron circular dichroism of chiral molecules by femtosecond multiphoton coincidence detection by Lehmann, C Stefan, Ram, N Bhargava, Powis, Ivan, Janssen, Maurice H M

“…Here, we provide a detailed account of novel experiments employing electron-ion coincidence imaging to discriminate chiral molecules. The full…”
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Influence of Vibrational Excitation and Nuclear Dynamics in Multiphoton Photoelectron Circular Dichroism of Fenchone by Singh, Dhirendra P, Thompson, James O. F, Reid, Katharine L, Powis, Ivan

“…We report photoelectron circular dichroism of S-(+)-fenchone enantiomers recorded with state–state vibrational level resolution using picosecond laser (2 + 1)…”
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VUV Photodynamics and Chiral Asymmetry in the Photoionization of Gas Phase Alanine Enantiomers by Tia, Maurice, Cunha de Miranda, Barbara, Daly, Steven, Gaie-Levrel, François, Garcia, Gustavo A, Nahon, Laurent, Powis, Ivan

“…The valence shell photoionization of the simplest proteinaceous chiral amino acid, alanine, is investigated over the vacuum ultraviolet region from its…”
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Enantioselective femtosecond laser photoionization spectrometry of limonene using photoelectron circular dichroism by Rafiee Fanood, Mohammad M, Janssen, Maurice H M, Powis, Ivan

“…Limonene is ionized by circularly polarized 420 nm femtosecond laser pulses. Ion mass and photoelectron energy spectra identify the dominant (2 + 1)…”
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Conformer-dependent vacuum ultraviolet photodynamics and chiral asymmetries in pure enantiomers of gas phase proline by Hadidi, Rim, Božanić, Dušan K., Ganjitabar, Hassan, Garcia, Gustavo A., Powis, Ivan, Nahon, Laurent

“…Proline is a unique amino-acid, with a secondary amine fixed within a pyrrolidine ring providing specific structural properties to proline-rich biopolymers…”
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Photoelectron Spectroscopy and Circular Dichroism in Chiral Biomolecules:  l-Alanine by Powis, Ivan

“…A theoretical treatment of the photoionization of the chiral amino acid l-alanine is presented. Particular attention is paid to a previously unobserved…”
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A Valence Photoelectron Imaging Investigation of Chiral Asymmetry in the Photoionization of Fenchone and Camphor by Powis, Ivan, Harding, Chris J., Garcia, Gustavo A., Nahon, Laurent

“…Photoelectron circular dichroism (PECD) is investigated in the valence ionization of selected fenchone enantiomers using a photoelectron imaging technique and…”
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Giant Chiral Asymmetry in the C 1s Core Level Photoemission from Randomly Oriented Fenchone Enantiomers by Ulrich, Volker, Barth, Silko, Joshi, Sanjeev, Hergenhahn, Uwe, Mikajlo, Elisabeth, Harding, Chris J, Powis, Ivan

“…Measurements made with a dilute, non-oriented, gas-phase sample of a selected fenchone enantiomer using circularly polarized synchrotron radiation demonstrate…”
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Initial-state and final-state vibrational effects in the treatment of molecular photoionization dynamics by Powis, Ivan

“…The influence upon molecular photoionization dynamics of vibrational motion of the nuclei in both the initial (neutral) state and the final (molecular ion)…”
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Valence shell one-photon photoelectron circular dichroism in chiral systems by Nahon, Laurent, Garcia, Gustavo A., Powis, Ivan

“…•Photoelectron circular dichroism (PECD) is a very intense chiroptical effect.•PECD is able to probe molecular structures: conformations, substitution,…”
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Photoelectron circular dichroism: Chiral asymmetry in the angular distribution of electrons emitted by (+)-S-carvone by Powis, Ivan

“…The technique of photoelectron circular dichroism (PECD) is introduced and illustrated by the presentation of results obtained for the C 1s core ionization of…”
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Identifying and Understanding Strong Vibronic Interaction Effects Observed in the Asymmetry of Chiral Molecule Photoelectron Angular Distributions by Garcia, Gustavo A., Dossmann, Héloïse, Nahon, Laurent, Daly, Steven, Powis, Ivan

“…Electron–ion coincidence imaging is used to study chiral asymmetry in the angular distribution of electrons emitted from randomly‐oriented enantiomers of two…”
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Corrigendum: Experimental and Theoretical Investigation of the 3sp(d) Rydberg States of Fenchone by Polarized Laser Resonance‐Enhanced‐Multiphoton‐Ionization and Fourier Transform VUV Absorption Spectroscopy by Singh, Dhirendra P., De Oliveira, Nelson, Garcia, Gustavo A., Vredenborg, Arno, Powis, Ivan

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Vibrationally-resolved photoelectron spectroscopy and photoelectron circular dichroism of bicyclic monoterpene enantiomers by Ganjitabar, Hassan, Hadidi, Rim, Garcia, Gustavo A., Nahon, Laurent, Powis, Ivan

“…[Display omitted] •PhotoElectron Spectra & Circular Dichroism (PECD) with vibrational resolution.•A record 37% chiral asymmetry factor found for PECD of…”
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The Interplay Between Conformation and Absolute Configuration in Chiral Electron Dynamics of Small Diols by Daly, Steven, Tia, Maurice, Garcia, Gustavo A., Nahon, Laurent, Powis, Ivan

“…A competition between chiral characteristics alternatively attributable to either conformation or to absolute configuration is identified. Circular dichroism…”
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Enantiomer-specific analysis of multi-component mixtures by correlated electron imaging–ion mass spectrometry by Fanood, Mohammad M Rafiee, Ram, N. Bhargava, Lehmann, C. Stefan, Powis, Ivan, Janssen, Maurice H. M.

“…Simultaneous, enantiomer-specific identification of chiral molecules in multi-component mixtures is extremely challenging. Many established techniques for…”
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Experimental and Theoretical Investigation of the 3sp(d) Rydberg States of Fenchone by Polarized Laser Resonance‐Enhanced‐Multiphoton‐Ionization and Fourier Transform VUV Absorption Spectroscopy by Singh, Dhirendra P., De Oliveira, Nelson, Garcia, Gustavo A., Vredenborg, Arno, Powis, Ivan

“…The VUV absorption spectrum of fenchone is re‐examined using synchrotron radiation Fourier transform spectrometry, revealing new vibrational structure…”
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The role of the intermediate state in angle-resolved photoelectron studies using (2 + 1) resonance-enhanced multiphoton ionization of the chiral terpenes, α-pinene and 3-carene by Ganjitabar, Hassan, Singh, Dhirendra P., Chapman, Richard, Gardner, Adrian, Minns, Russell S., Powis, Ivan, Reid, Katharine L., Vredenborg, Arno

“…Photoelectron angular distributions (PADs), ranging up to the maximum 6th order Legendre polynomial term set by the Yang theorem, have been recorded for the (2…”
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Wavelength dependent photoelectron circular dichroism of limonene studied by femtosecond multiphoton laser ionization and electron-ion coincidence imaging by Rafiee Fanood, Mohammad M, Janssen, Maurice H M, Powis, Ivan

“…Enantiomers of the monoterpene limonene have been investigated by (2 + 1) resonance enhanced multiphoton ionization and photoelectron circular dichroism…”
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