Alexandrine FLAMBARD

Associate professor

Sorbonne University
4 Place Jussieu, 75252 Paris cedex 5
Tower 33-43, 5th floor
ERMMES Group
Phone :(+33) (0)1 44 27 30 75

Research interests

  • Paramagnetic NMR
  • Solid state NMR
  • Molecular magnetic materials

Current research

Solid-state NMR characterization of molecular magnetic materials:

  • Structural information at local order: complementarity with X-ray diffraction (average view)
  • Magnetic information (hyperfine interactions with unpaired electrons from transition metals): determination of the spin density on the probed nucleus / spin transfer mechanisms

Selected recent results :

Cadmium-113 magic angle spinning NMR (MAS) measurements on model Prussian Blue analogues Cd3[FexCo1-x(CN)6]2,15H2O (x = 0, 0.25, 0.5, 0.75, 1) allowed:

  • to confirm the role of the polarization mechanism in the transfer of the spin density from the paramagnetic center to the cadmium core through the cyanide bridge;
  • to show a significant difference of the real structure compared to the average view proposed by the DRX (Figure 1).

The NMR of paramagnetic compounds through these results shows that NMR spectroscopy can be a powerful characterization technique even for this kind of materials. Indeed, the presence of a paramagnetic source in the vicinity of the observed nucleus led to a bursting of the signals producing a sort of “magnifying glass effect” on the NMR spectrum and thus allowed a clear distinction of the Cd sites as well as their quantification, which is not always possible in diamagnetic derivatives (Figure 2).

Figure 1 : Structure (a) and 113Cd RMN-MAS spectra (b) of Prussian blue analogues Cd3[FexCo1-x(CN)6]2,15H2O

Figure 2: 113Cd RMN-MAS spectra of Cd3[FexCo1-x(CN)6]2,15H2O (Fe, S=1/2 et Co, S=0)

Scientific career

2002 : Diploma of Advanced Studies (DEA) in chemistry at the laboratory of Physico-Chemistry of Interfaces and Applications (LPCIA) at the Faculty of Sciences Jean Perrin, Lens : ” Ferroelectric thin films of PZT deposited on different substrates : study by X-ray Diffraction and Atomic and Electrostatic Force Microscopies ” supervised by R. Desfeux (Maître de Conférence)

2005 : Thesis in chemistry at the University of Lille 1 in the laboratory of Crystallochemistry and Physicochemistry of the Solid (LCPS) : ” Oxygen-17 NMR and new methodologies of NMR of the solids applied to the characterization of phosphate materials ” under the supervision of professors L. Montagne and J.P. Amoureux, and L. Delevoye (Research Fellow)

2006 : Post-doctoral internship at the Institute of Condensed Matter Chemistry of Bordeaux (ICMCB) under the supervision of M. Ménétrier (IR) : ” NMR study of battery materials within the framework of the European Network of Excellence ALISTORE (Advanced Lithium energy STORagE systems) ” NMR study of phosphate materials (ICMCB / Faculty of Casablanca)

2007 : Member of the Paris Institute of Molecular Chemistry (IPCM) in the group Molecular Magnetic Materials and X-ray Absorption (MMMAX) under the direction of Yves Journaux (Research Director). Lecturer at the University Pierre et Marie Curie of Paris 6.

Selected publications :

  1. Applied Surface Science 228 (2004) 34-39
    “Effect of crystallographic orientation upon switching properties of PZT film measured by electrostatic force microscopy”
    Rachel Desfeux, Antonio Da Costa, Alexandrine Flambard, Céline Legrand, Denis Tondelier, Gilles Poullain, Rachid Bouregba
  2. J. Non-Cryst Solids 345&346 (2004) 75-79
    “Solid-state NMR study of mixed network sodium-niobium phosphate glasses”
    Alexandrine Flambard, Lionel Montagne, Laurent Delevoye, Gérard Palavit, Jean-
    Paul Amoureux, Jean-Jacques Videau
  3. J. Mag. Res. 175 (2005) 285-299
    “Implementing SPAM into STMAS : A net sensitivity improvement in highresolution NMR of quadrupolar nuclei”
    Jean-Paul Amoureux, Laurent Delevoye, Gerd Fink, Francis Taulelle, Alexandrine
    Flambard, Lionel Montagne
  4. Chemical Communications 27 (2005) 3472-3474
    “A very sensitive high-resolution NMR method for quadrupolar nuclei : SPAMDQF-STMAS”
    Jean-Paul Amoureux, Alexandrine Flambard, Laurent Delevoye, Lionel Montagne
  5. Chemical Communications (2006) 3426-3428
    “A new 17O-isotopic enrichment method for the NMR characterisation of phosphate compounds”
    Alexandrine Flambard, Lionel Montagne, Laurent Delevoye
  6. Solid-State NMR 32 (2007) 34-43
    “93Nb and 17O NMR chemical shifts of niobiophosphate compounds”
    Alexandrine Flambard, Lionel Montagne, Laurent Delevoye, Stefan Steuernagel
  7. J. Non-Cryst Solids 354 (2008) 3540-3547
    “Structure and nonlinear optical properties of sodium-niobium phosphate glasses”
    A. Flambard, J.J. Videau, L. Delevoye, T. Cardinal, C. Labrugère, C.A. Rivero, M. Couzi, L. Montagne
  8. C. R. Chimie 11 (2008) 415-422
    “Solution and solid-state 31P NMR study of paramagnetic polyoxometalates”
    A. Flambard, L. Ruhlmann, J. Canny, R. Thouvenot
  9. Journal of solid state chemistry 181 (2008) 3303-3307
    “NMR evidence of LiF coating rather than fluorine substitution in Li(Ni0.425Mn0.425Co0.15)O2”
    M. Ménétrier, J. Bains, L. Croguennec, A. Flambard, E. Bekaert, C. Jordy, Ph. Biensan, C. Delmas
  10. Journal of the electrochemical society 156 (5) (2009) A349-A355
    “Synthesis of “Li1.1(Ni0.425Mn0.425Co0.15)0.9O1.8F0.2” Materials by Different Routes : Is There Fluorine Substitution for Oxygen ?”
    L. Croguennec, J. Bains, M. Ménétrier, A. Flambard, E. Bekaert, C. Jordy, P. Biensan, C. Delmas
  11. Journal of Colloid and Interface Science 330 (2009) 20-28
    “Sorption of tartrate ions to lanthanum (III)-modified calcium fluor- and hydroxyapatite”
    A. Aissa, M. Debbabi, M. Gruselle, R. Thouvenot, A. Flambard, P. Gredin, P. Beaunier, K. Tõnsuaadu
  12. Angew. Chem. Int. Ed. 48 (2009) 1673-1676
    “Revisiting Prussian blue analogues with solid-state MAS NMR spectroscopy : spin density and local structure in Cd3[Fe(CN)6]2.15H2O”
    A. Flambard, F.H. Köhler, R. Lescouëzec,
  13. Angew. Chem. Int. Ed. 48 (2009) 2-5 highlighted : “Spin polarized structures and solid-state NMR spectroscopy of paramagnetic compounds”
    J. Schmedt auf der Günne
  14. Chem. Eur. J. 17 (2011) 11567-11575
    “Probing spin density and local structure in the Prussian blue analogues CsCd[Fe/Co(CN)6].0.5H2O and Cd3[Fe/Co(CN)6]2.15H2O with solid-state MAS NMR spectroscopy”
    A. Flambard, F.H. Köhler, R. Lescouëzec, B. Revel
  15. ACS Catal. 1 (2011) 1729-1733
    “Calcium hydroxyapatites as efficient catalysts for the Michael C-C bond formation”
    M. Gruselle, T. Kanger, R. Thouvenot, A. Flambard, K. Kriis, V. Mikli, R. Traksmaa, B. Maaten K. Tõnsuaadu