Výsledky vyhledávání - "Jean-Claude Leicknam"

What can be learned from femtochemistry: the H bond in water

Autor: Stanislas Pommeret, Jean-Claude Leicknam, Savo Bratos

Publikováno v: Molecular Physics. 112:1284-1293

A non-empirical theory is presented showing how infrared pump–probe spectroscopy can be used to measure subpicosecond variations of the oxygen–oxygen distribution functions in liquid water, Δg(r, τ). It should be emphasised that the equations d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a3566e684914aaa6011a66a050fae1b8
https://doi.org/10.1080/00268976.2014.894213

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Structure of hydrogen bonds in liquid water at subpicosecond time scales

Autor: Stanislas Pommeret, Jean-Claude Leicknam, Savo Bratos

Publikováno v: Journal of Molecular Structure. 976:270-273

A theory is presented showing how infrared pump–probe spectroscopy can be used to measure subpicosecond variations of the oxygen–oxygen distribution function in liquid water, Δ g OO ( R , t ). For times t > t c , where t c > 100 − 200 fs is th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41b1afff86f65c494ef5c3d487a3d2fe
https://doi.org/10.1016/j.molstruc.2010.04.004

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Relation between the OH stretching frequency and the OO distance in time-resolved infrared spectroscopy of hydrogen bonding

Autor: Jean-Claude Leicknam, Stanislas Pommeret, Savo Bratos

Publikováno v: Chemical Physics. 359:53-57

A non-empirical theory is presented to study the relation between the OH stretching frequency and the OO distance in ultrafast laser spectra of water. Diluted solutions HDO / D 2 O rather than pure H 2 O were considered to switch off resonant vibrati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::87d7e824fe5ec63b4c84ccfe2511a69f
https://doi.org/10.1016/j.chemphys.2009.03.016

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Filming the birth of molecules and accompanying solvent rearrangement

Autor: Jeongho Kim, Jakob Petersen, Hyotcherl Ihee, Jae Hyuk Lee, Michael Wulff, Jean-Claude Leicknam, Laurent Guérin, Marco Cammarata, Qingyu Kong, Klaus Braagaard Møller, Savo Bratos

Publikováno v: Journal of the American Chemical Society. 135(8)

Molecules are often born with high energy and large-amplitude vibrations. In solution, a newly formed molecule cools down by transferring energy to the surrounding solvent molecules. The progression of the molecular and solute-solvent cage structure

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72dcaa997bd48cfb1edab19d65759484
https://pubmed.ncbi.nlm.nih.gov/23374032

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Time-resolved observation of the Eigen cation in liquid water

Autor: Savo Bratos, François Hache, Guilhem Gallot, Wafa Amir, Jean-Claude Leicknam, Rodolphe Vuilleumier

Publikováno v: Journal of Chemical Physics
Journal of Chemical Physics, American Institute of Physics, 2007, 126 (3), pp.34511. ⟨10.1063/1.2428299⟩
Journal of Chemical Physics, 2007, 126 (3), pp.34511. ⟨10.1063/1.2428299⟩

International audience; Experimental observation and time relaxation measurement of the hydrated proton Eigen form [H3 O+ (H2 O)3] are presented here. Vibrational time-resolved spectroscopy is used with an original method of investigating the proton

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e68b4210950f8e27914ec17f798c7d4c
https://hal-polytechnique.archives-ouvertes.fr/hal-00824061/document

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Ultrafast transient optical spectroscopy in liquid water

Autor: N. Lascoux, Savo Bratos, G.M. Gale, Jean-Claude Leicknam, François Hache, Guilhem Gallot

Publikováno v: Conference Digest. 2000 International Quantum Electronics Conference (Cat. No.00TH8504).

Direct observation of temporally varying molecular geometries during a chemical reaction is very challenging. Ultrafast (pico- and femtosecond) laser spectroscopy allows the detection of various short living species and the determination of their lif

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::94ab4f23117b3d8b78f9efa0da116794
https://doi.org/10.1109/iqec.2000.908192

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Real time vizualization of atomic motions in dense phases

Autor: Serge Bratos, Jean-Claude Leicknam, Mirloup, F., Vuilleumier, R., Guilhem Gallot, Plech, A., Wulff, M., Pommeret, S.

Publikováno v: Novel Approaches to structure and Dynamics of liquids: ExperimentsTheories and Simulations
Proceedings of the NATO Advanced Study Institute on Novel Approaches to structure and Dynamics of liquids: ExperimentsTheories and Simulations
Proceedings of the NATO Advanced Study Institute on Novel Approaches to structure and Dynamics of liquids: ExperimentsTheories and Simulations, Sep 2002, Rhodes, Greece. pp.111
HAL

International audience; No abstract available

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::c37007f6846480d2f0f60c15466f202d
https://hal-polytechnique.archives-ouvertes.fr/hal-00844510

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Transient absorption of vibrationally excited water

Autor: H.-K. Nienhuys, Savo Bratos, N. Lascoux, Jean-Claude Leicknam, G. M. Gale, H. J. Bakker, Guilhem Gallot

Publikováno v: Journal of Chemical Physics
Journal of Chemical Physics, American Institute of Physics, 2002, 116 (6), pp.2592-2598. ⟨10.1063/1.1432687⟩
Journal of Chemical Physics, 2002, 116 (6), pp.2592-2598. ⟨10.1063/1.1432687⟩

We study the spectral response of the transition between the first and the second excited state of the O–H stretch vibration of HDO dissolved in liquid D2O with two-color femtosecond mid-infrared spectroscopy. The spectral response of this transiti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::771646ae6f65e60ffe24fabdcff44cb9
https://hal.archives-ouvertes.fr/hal-02374482

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Relation between frequency and H bond length in heavy water: Towards the understanding of the unusual properties of H bond dynamics in nanoporous media

Autor: Jean-Claude Leicknam, Raluca M. Musat, Stanislas Pommeret, Savo Bratos, Jean Philippe Renault

Publikováno v: Journal of Physics: Conference Series. 177:012012

The published work on H bond dynamics mainly refers to diluted solutions HDO/D2O rather than to normal water. The reasons for this choice are both theoretical and experimental. Mechanical isolation of the OH vibrator eliminating the resonant energy t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3970ed3b88a5720414f7260e3068aa34
https://doi.org/10.1088/1742-6596/177/1/012012

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Infrared study of diluted solutions of polyatomic molecules. I. Band shape of fundamentals associated with nondegenerate normal modes

Autor: Jean-Claude Leicknam, Yves Guissani, Savo Bratos

Publikováno v: The Journal of Chemical Physics. 68:3380-3390

A theory is proposed to analyze the band shapes of the simplest class of ir band profiles of polyatomic molecule solutions. The following theoretical points are explored in detail: dependence of vibrational correlation functions on the nature of norm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8af5ea63ca7fdf56805c0b7daaecbd0b
https://doi.org/10.1063/1.436245

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