Dr. Gildas Goldsztejn

Gildas.goldsztejn(at)cnrs.fr

+33 169157636

Position

Research Scientist at CNRS. Junior group leader at the Institute of Molecular Sciences of Orsay (ISMO), France.

Research

My group’s primary research interest is the interaction between light and gas-phase matter. In particular, we focus on the study of photoinduced excited states and their relaxation pathways in complex molecular systems (eg. Metalloporphyrins and derivatives). Our interest lies in the study of electronic and nuclear dynamics and electronic correlation processes. To that aim, we developed a number of experimental, instrumental and theoretical tools.

• Experimentally: we have expertise in performing time-resolved electron or absorption spectroscopies using ultrafast light sources such as HHG sources or XFEL [1-2]. In this case, we use the XUV/X-ray radiation to locally probe the ultrafast dynamics induced by absorption of a pump pulse (UV/Vis/IR). We also have strong expertise of measurements using monochromatic X-ray radiation from synchrotron sources. In this case, we study the interaction between the X-ray photons and the molecular systems [3-5].
• Instrumentally: we recently developed a spectrometer capable of measuring electrons and ions in coincidence. It is combined with a new evaporation technique, i.e. a > 1 kHz laser desorption scheme coupled to a supersonic expansion. The whole setup is designed to study complex/fragile molecular systems and their hydrated complexes, or complexes with non-covalent partners, in the gas-phase at high repetition rates [6]. It is also easily transportable to ultrafast/high-repetition rate laser sources (HHG, XFELs) or synchrotrons.
• Theoretically: we use or have developed a number of tools ranging from quantum chemical softwares or home-made models to simulate valence and core-shell photoelectron spectra [7-8], X-ray absorption spectra [7-9], normal and resonant Auger spectra [7, 10], Kbeta and valence-to-core emission spectra of transition-metals containing molecules [11]. These tools allowed us to interpret our data and uncover subtle mechanisms such as ionisation-induced double charge transfer [12], correlation-driven effective hole transfer [13], or electronic-lifetime state interferences [9, 14].

Curriculum Vitae

2019-Present: Research Scientist at the CNRS. Junior group leader at the Institute of Molecular Sciences, Orsay (France).

2022: Habilitation to Direct Research (HDR). University of Paris-Saclay.

2018-2019: Post-doctoral fellow at the CEA, Saclay (France). Topic: Conformational preferences of peptide models containing sulfur or selenium atoms studied in the gas-phase by double resonance UV/IR laser spectroscopy and DFT calculations.

2017-2018: Post-doctoral fellow at the ISMO, Orsay (France). Topic: Conformational preferences of carbohydrates and their hydrated complexes studied by double resonance UV/IR laser spectroscopy and DFT calculations.

2016-2017: Post-doctoral fellow at the Max-Born Institute, Berlin (Germany). Topic: Development of an HHG beamline in the soft X-ray range (N 1s ≈ 410 eV). Beamline scientist at a femtosecond laser chain.

2013-2016: PhD student at the Laboratory of Chemical-Physics Matter and Radiation, Paris (France). Topic: Electronic correlation processes in deep core-shell photoionization of atoms and molecules.

Illustrative references:

[1] Soft X-ray Absorption Spectroscopy of Aqueous Solutions Using a Table-Top Femtosecond Soft X-ray Source, C. Kleine, M. Ekimova, G. Goldsztejn, S. Raabe, C. Strüber, J. Ludwig, S. Yarlagadda, S. Eisebitt, M. J. J. Vrakking, T. Elsaesser, E. T. J. Nibbering, and A. Rouzée The Journal of Physical Chemistry Letters 2019 10 (1), 52-58, DOI: 10.1021/acs.jpclett.8b03420

[2] Time-resolved inner-shell photoelectron spectroscopy: From a bound molecule to an isolated atom, F. Brauße, G. Goldsztejn, et al., Phys. Rev. A 2018, 97, 043429, DOI: 10.1103/PhysRevA.97.043429

[3] Double-Core-Hole States in Neon: Lifetime, Post-Collision Interaction, and Spectral Assignment G. Goldsztejn*, T. Marchenko, R. Püttner, L. Journel, R. Guillemin, S. Carniato, P. Selles, O. Travnikova, D. Céolin, A. F. Lago, R. Feifel, P. Lablanquie, M. N. Piancastelli, F. Penent, and M. Simon, Phys. Rev. Lett. 117, 133001, 2016, DOI: https://doi.org/10.1103/PhysRevLett.117.133001

[4] Hard-X-Ray-Induced Multistep Ultrafast Dissociation, O. Travnikova, T. Marchenko, G. Goldsztejn, K. Jänkälä, N. Sisourat, S. Carniato, R. Guillemin, L. Journel, D. Céolin, R. Püttner, H. Iwayama, E. Shigemasa, M. N. Piancastelli, and M. Simon, Phys. Rev. Lett. 116, 213001, DOI: https://doi.org/10.1103/PhysRevLett.116.213001

[5] Potential Energy Surface Reconstruction and Lifetime Determination of Molecular Double-Core-Hole States in the Hard X-Ray Regime, T. Marchenko, G. Goldsztejn, K. Jänkälä, O. Travnikova, L. Journel, R. Guillemin, N. Sisourat, D. Céolin, M. Žitnik, M. Kavčič, K. Bučar, A. Mihelič, B. Cunha de Miranda, I. Ismail, A. F. Lago, F. Gel’mukhanov, R. Püttner, M. N. Piancastelli, and M. Simon, Phys. Rev. Lett. 119, 133001, DOI: https://doi.org/10.1103/PhysRevLett.119.133001

[6] A kHz laser desorption set-up adapted to ultrafast gas-phase measurements of biomolecules, K. Marmorat, E. Gloaguen, A. Kumar, A. Piard, A. Kossov, M. Briant, P. Çarçabal*, and G. Goldsztejn*, Rev. Sci. Instrum. 2025, accepted.

[7] Experimental and theoretical study of resonant core-hole spectroscopies of gas-phase free-base phthalocyanines, C. E. V. de Moura, J. Laurent, J. Bozek, M. Briant, P. Çarçabal, D. Cubaynes, N. Shafizadeh, M. Simon, B. Soep, R. Püttner and G. Goldsztejn*, Phys. Chem. Chem. Phys., 2023, 25, 15555-15566, DOI: 10.1039/D3CP01746J

[8] Consistent characterization of the electronic ground state of iron(ii) phthalocyanine from valence and core–shell electron spectroscopy, J. Laurent, J. Bozek, M. Briant, P. Çarçabal, D. Cubaynes, A. Milosavljević, R. Püttner, N. Shafizadeh, M. Simon, B. Soep and  G. Goldsztejn*, Phys. Chem. Chem. Phys., 2022,24, 2656-2663, DOI: doi.org/10.1039/D1CP04845G

[9] Electronic-state–lifetime interference in the hard-x-ray regime: Argon as a showcase, G. Goldsztejn*, R. Püttner, L. Journel, R. Guillemin, O. Travnikova, R. K. Kushawaha, B. Cunha de Miranda, I. Ismail, D. Céolin, M. N. Piancastelli, M. Simon, and T. Marchenko, Phys. Rev. A 95, 012509, 2017 DOI: https://doi.org/10.1103/PhysRevA.95.012509

[10] Simulation of Auger decay dynamics in the hard X-ray regime: HCl as a showcase, G. Goldsztejn*, R. Guillemin, T. Marchenko, O. Travnikova, D. Céolin, L. Journel, M. Simon, M. N. Piancastelli* and R. Püttner*, Phys. Chem. Chem. Phys., 2022, 24, 6590-6604, DOI: 10.1039/D1CP05662J

[11] X-ray emission spectroscopy in liquid jets: a effective tool to probe valence and p-shells in organometallics and the influence of the solvation, L. Journel*, N. H. Azzouza, G. Goldsztejn*, R. Dupuy, J. Palaudoux, M. Fournier, S. Carniato, J. M. Ablett, J-P. Rueff, and D. Céolin, J. Chem. Phys, 2025, accepted.

[12] Ionization-Induced Double Charge Transfer in Metallophthalocyanines Revealed by Ab Initio 2p X-ray Photoelectron Spectroscopy S. Carniato, R. Püttner, M. Briant, E. Gloaguen, K. Marmorat, M. Labeye, P. Çarçabal, and G. Goldsztejn*, J. Phys. Chem. Lett. 2025, submitted

[13] Effective core hole transport by a transient electronic correlation bridge forming in an inter-atomic Auger excitation/de-excitation process, R. Püttner, M. Carrière, J. Laurent, J. Bozek, D. Cubaynes, M. Simon, N. Shafizadeh, B. Soep, N. Owschimikow, M. Briant, P. Çarçabal and G. Goldsztejn*, In preparation (2025).

[14] Electronic state-lifetime interference in resonant Auger spectra: a tool to disentangle overlapping core-excited states, G. Goldsztejn*, T. Marchenko, D. Céolin, L. Journel, R. Guillemin, J.-P. Rueff, R. K. Kushawaha, R. Püttner, M. N. Piancastelli  and  M. Simon, Phys. Chem. Chem. Phys., 2016,18, 15133-15142, DOI: https://doi.org/10.1039/C6CP01998F