Výsledky vyhledávání - "J. A. Fayeton"

Ion-Induced Dipole Interactions and Fragmentation Times: Cα-Cβ Chromophore Bond Dissociation Channel

Autor: Michel Barat, Christophe Dehon, Satchin Soorkia, Marie Pérot-Taillandier, Sunil Kumar S, Bruno Lucas, Christophe Jouvet, J. A. Fayeton

Publikováno v: Journal of Physical Chemistry Letters
Journal of Physical Chemistry Letters, American Chemical Society, 2015, 6, pp.2070. ⟨10.1021/acs.jpclett.5b00792⟩
Journal of Physical Chemistry Letters, 2015, 6, pp.2070. ⟨10.1021/acs.jpclett.5b00792⟩

The fragmentation times corresponding to the loss of the chromophore (C$\alpha$-- C$\beta$ bond dissociation channel) after photoexcitation at 263 nm have been investigated for several small peptides containing tryptophan or tyrosine. For tryptophan-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a7cf7e8dc3c3b06e49192e8199dacf4
https://doi.org/10.1021/acs.jpclett.5b00792

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Photofragmentation mechanisms in protonated chiral cinchona alkaloids

Autor: Katia Le Barbu-Debus, Sunil Kumar, Michel Broquier, Valeria Lepere, Debora Scuderi, J. A. Fayeton, Ivan Alata, Anne Zehnacker, Bruno Lucas

Publikováno v: Physical Chemistry Chemical Physics
Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2016, 18 (32), pp.22668-22677. ⟨10.1039/c6cp04041a⟩
Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2016, 18 (32), pp.22668-22677. ⟨10.1039/C6CP04041A⟩

The photo-stability of protonated cinchona alkaloids is studied in the gas phase by a multi-technique approach. A multi-coincidence technique is used to demonstrate that the dissociation is a direct process. Two dissociation channels are observed. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2605760dc300462b16326fc3d1f64664
https://hal.archives-ouvertes.fr/hal-02305498

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Mechanisms of UV Photodissociation of Small Protonated Peptides

Autor: J. A. Fayeton, Michel Barat, Bruno Lucas, Christophe Jouvet, M. Pérot

Publikováno v: The Journal of Physical Chemistry A. 114:3147-3156

Photofragmentation of protonated dipeptides by 263 nm photons is investigated with an experimental technique based on the detection in coincidence of the ionic and neutral fragments. With this method, it is possible to determine whether the fragmenta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc4ce08a32c36f5ac01277b344f1d428
https://doi.org/10.1021/jp908937s

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Photodissociation of protonated tryptamine and its supramolecular complex with 18-crown-6 ether: Dissociation times and channels, absorption spectra, and excited states calculations

Autor: Jean Ann Wyer, Umesh Kadhane, Anneli Ehlerding, Henning Zettergren, Bruno Lucas, Maj-Britt Suhr Kirketerp, J. A. Fayeton, S. Brøndsted Nielsen, Christophe Jouvet, M. Pérot, Michel Barat

Publikováno v: Kadhane, U, Pérot, M, Lucas, B, Barat, M, Fayeton, J A, Jouvet, C, Ehlerding, A, Kirketerp, M-B S, Nielsen, S B, Wyer, J & Zettergren, H 2009, ' Photodissociation of protonated tryptamine and its supramolecular complex with 18-crown-6 ether: Dissociation times and channels, absorption spectra, and excited states calculations ', Chemical Physics Letters, vol. 480, no. 1-3, pp. 57-61 . https://doi.org/10.1016/j.cplett.2009.08.064

Photodissociation of the complex between protonated tryptamine, TryH + , and 18-crown-6 ether (CE) was investigated. Absorption maxima of TryH + and TryH + (CE) are at 249 and 273 nm, respectively. Ions decay exponentially on a microsecond timescale,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e13c861e95c23389137288642eda329c
https://doi.org/10.1016/j.cplett.2009.08.064

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Photo-induced dissociation of protonated tryptophan TrpH+: A direct dissociation channel in the excited states controls the hydrogen atom loss

Autor: J. A. Fayeton, Charles Desfrançois, S. Martrenchard, Hyuk Kang, Gilles Grégoire, Jean-Pierre Schermann, Claude Dedonder-Lardeux, Michel Barat, Christophe Jouvet

Publikováno v: Phys. Chem. Chem. Phys.. 6:2628-2632

Protonated tryptophan ions (TrpH+) are generated by electrospray ionization and dissociated by irradiation with a UV laser. Different photo-fragments are observed among which a new photo-induced dissociation channel leading to the loss of a hydrogen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66ef0d46f0e132198c755585ef90efdf
https://doi.org/10.1039/b315425d

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Collision induced fragmentation of small ionic argon clusters

Autor: Michel Barat, J.C. Brenot, Y. J. Picard, J. A. Fayeton

Publikováno v: The Journal of Chemical Physics. 117:1497-1506

The mechanisms of collision induced fragmentation of small Arn+ (n=2–9) clusters are investigated in the 100 eV center-of-mass energy range. The velocity vectors of the fragments are measured in a multicoincidence experiment for two- and three-body

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4db51d5ef1829114a628ff5a2403de26
https://doi.org/10.1063/1.1485067

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Collision induced fragmentation of small ionic sodium clusters. II. Three-body fragmentation

Autor: Michel Barat, J. A. Fayeton, H. Dunet, J.C. Brenot, Y. J. Picard

Publikováno v: The Journal of Chemical Physics. 113:1061-1066

Multiple fragmentation of small Nan+ clusters (n=3–5) induced by collision with He atoms is investigated in the 200 eV collision energy range. The Nan+→Nan−2++Na+Na channels are studied using a multicoincidence technique allowing for the determ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::38ece6ea09d42bbd662ffee340b9504c
https://doi.org/10.1063/1.481886

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Collision induced fragmentation of small ionic sodium clusters: Competition between electronic and impulsive mechanisms

Autor: Y. J. Picard, H. Dunet, Michel Barat, J.C. Brenot, J. A. Fayeton

Publikováno v: The Journal of Chemical Physics. 110:10758-10765

Collision induced fragmentation of small Nan+ (n=3–9) clusters with He atoms is investigated in the 100 eV center-of-mass collision energy range. The experiment is based on the determination of the velocity vectors of the fragments using a multicoi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::423e1f6f906f24892908dbfa8369a019
https://doi.org/10.1063/1.479019

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Collision induced dissociation of the heteronuclear alkali ion $\mathsf{NaK^+}$ .Comparison with the $\mathsf{Na_2^+}$ and $\mathsf{K_2^+}$ dissociations

Autor: J.C. Brenot, Michel Barat, H. Dunet, Y. J. Picard, J. A. Fayeton

Publikováno v: The European Physical Journal D - Atomic, Molecular and Optical Physics. 1:271-276

An experimental study of the dissociation of the heteronuclear Na ion by collisions with He and H2 targets at a collision energy of 2.4 keV is presented. The use of a technique based on the measurement of the velocity vectors of the fragments all

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::48297ac5a38baf2ed83e668c719f273a
https://doi.org/10.1007/s100530050093

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Detailed experimental and theoretical study of collision-induced dissociation ofNa2+ions on He andH2targets at keV energies

Autor: H. Dunet, Michel Barat, J.C. Brenot, Ulf Saalmann, R. Schmidt, J. A. Fayeton, Y. J. Picard

Publikováno v: Physical Review A. 57:1058-1068

A combined experimental and theoretical investigation of collision-induced dissociation (CID) of the quasi-one-electron system ${\mathrm{Na}}_{2}^{+}$ He at 80 eV center-of-mass energy is presented. This study, complemented by additional measurements

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aee7cade37d8bb3abb79cc1ac1bdc583
https://doi.org/10.1103/physreva.57.1058

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