Pr. Anna Proust

Anna PROUST

Professor

Sorbonne University
4 Place Jussieu, 75252 Paris cedex 5
Tower 43-44, 5th floor
E-POM group
Phone : (+33) (0)1 44 27 30 34

Research interests

Molecular inorganic chemistry, atom transfer reactions, electron transfer reactions, solar energy conversion, molecular electronics and nanosciences

Molecular oxides, polyoxometalates, transition metal and organometallic derivatives of polyoxometalates, organic-inorganic hybrids, polyoxometalates as redox mediators / electron reservoirs

Current research

  • Functionalization of polyoxometalates
  • Investigation of (photo)reduced polyoxometalates
  • POMs processing, immobilization on various surfaces
  • Charge transport behavior of polyoxometalates thin films toward molecular electronics

Selected recent results

  • Capitalizing on our experience in the handling of organic-inorganic POM hybrids, we have prepared bis-diazonium hybrids to harness the propensity of diazonium salts to form multi-layered materials upon electrochemical reduction. A few nanometers thick materials have thus been grown onto ITO electrodes and have shown to be potentially suitable for Write-Once-Read-Many (WORM) devices, with a low set voltage.
    Inorg. Chem. Front., 2024, DOI: 10.1039/d3qi01761c
  • Charge transport across polyoxometalate-based monolayers depend on their redox state, the tunneling current increasing with the reduction of the POM. The photoswitch of the POM redox state is induced by UV-irradiation and has been monitored by conductivity measurements. Nanoscale, 2022, 14, 13790-13800
  • The relative electron-acceptor ability of polyoxometalates, as determined in solution by electrochemical studies and confirmed by theoretical calculation of the position of their LUMOs, is translated in the solid-state: analysis of current/voltage traces recorded by C-AFM across POM-based monolayers gives a similar energy difference between the molecular orbitals involved in the charge transport. This confirms the ability of POMs to modulate the tunneling current. ACS Applied Materials and Interfaces, 2020, 12, 48109-48123; Nanoscale 2018, 10, 17156
  • Our interest in electrocatalysis/activation of small molecules and surface functionalization has driven our impetus to devise a photocathode by covalent co-immobilization of a polyoxometalate and an organic dye onto nano-ITO. The promoting effect of the POM on the photocurrent intensity has been disclosed in the presence of an irreversible acceptor, mimicking a potential catalyst. This confirms the ability of POms to play the role of redox mediators. ACS Applied Energy Materials, 2020, 3, 163-169
  • Synthesis of new polyoxometalates with tailor-made properties, especially redox properties is essential. Polyoxomolybdates are better electron reservoirs than polyoxotungstates, yet they are more labile and their functionalization to give organic-inorganic hybrids like [PW9Mo2O39(SnC6H4I)]4- istrickier. Crossed characterizations by spectro-electrochemistry and ESR, together with theoretical calculations, led to the conclusion that the first two reduction events occur at the molydenum centers, with a strong anti-ferro magnetic coupling between the two unpaired electrons. Inorg. Chem, 2022, 7700-7709

Scientific career

  • 2000-: Full Professor UPMC then Sorbonne University
  • 2007-2011: Junior member of the Institut Universitaire de France (IUF)
  • 1999: Habilitation UPMC
  • 1993- 2000: Assistant and associate Professor UPMC
  • 1993: Post-doctoral fellow, Prof. Dr. A. Müller, University of Bielefeld, Germany
  • 1992: Ph.D. UPMC (Supervisor Prof. P. Gouzerh)
  • 1987-91: Undergraduate studies, Ecole Normale Supérieure (Paris)

Selected publications

  1. Redox-controlled conductance of polyoxometalate molecular junctions
    C. Huez, D. Guérin, S. Lenfant, F. Volatron, M. Calame, M. L. Perrin, A. Proust and D. Vuillaume
    Nanoscale, 2022, 14, 13790-13800 
  2. Covalent grafting of Polyoxometalate hybrids onto flat silicon oxide: insights from POM layers on oxides
    M. Laurans, K. Trinh, K. Dalla Francesca, G. Izzet, V. Humblot, S. Alvez, O. Pluchery, D. Vuillaume, S. Lenfant, F. Volatron, A. Proust
    ACS Applied Materials and Interfaces, 2020, 12, 48109-48123
  3. Thermodynamics, electrode kinetics and mechanistic nuances associated with the voltammetric reduction of dissolved [n-Bu4N]4[PW11O39{Sn(C6H4)CC(C6H4)(N3C4H10)}]  and a surface confined diazonium derivative
    M. A. Rahman, S.-X. Guo, M. Laurans, G.Izzet, A. Proust, A. M. Bond, J. Zhang
    ACS Applied Energy Materials, 2020, 3, 3991-4006
  4. Dye-sensitized photocathodes: boosting photoelectrochemical performances with polyoxometalate electron transfer mediators
    Y. Ben M’Barek, J. Sum, T. Rosser, S. Blanchard, F.Volatron, J. Fiz , M. Koepf, R. Salles, G. Izzet, V. Artero, M. Chavarot-Kerlidou,  A. Proust
    ACS Applied Energy Materials, 2020, 3, 163-169 
  5. Tailor-made covalent organic-inorganic polyoxometalate hybrids: versatile platforms for the elaboration of functional molecular architectures, G. Izzet, F. Volatron, A. Proust, Chem. Record. 2017, 17, 250-266
  6. Electro-assisted Reduction of CO2 to CO and Formaldehyde by the (TOA)6[a-SiW11O39Co(_)] Polyoxometalate, M. Girardi, S. Blanchard, S. Griveau, P. Simon, M. Fontecave, F. Bedioui, A. Proust, Eur. J. Inorg. Chem., 2015, 3642-3648. 
  7. Covalent amphiphilic polyoxometalates for the design of biphasic microemulsion systems, V. Jallet, G. Guillemot, J. Lai, P. Bauduin, V. Nardello-Rataj, A. Proust*, Chem. Commun., 2014, 6610-6612.
  8. Electrografting of Diazonium post-functionalized Polyoxometalates: Synthesis, Immobilization and Electron Transfer Characterization from Glassy Carbon, C.Rinfray, G. Izzet, J. Pinson, S. Gam Derouich, C. Combellas, F. Kanoufi, A.  Proust, Chem. Eur. J., 2013,19, 13838-13846
  9. Charge Photo-Accumulation and Photocatalytic Hydrogen Activity Under Visible Light in an Iridium(III)-Photosensitized Polyoxotungstate, B. Matt, J. Fize, J. Moussa, H.Amouri, V. Artero, G. Izzet, A. Proust, Energy and Environmental Science, 2013, 6, 10504-1508. DOI: 10.1039/C3EE40352A
  10. Functionalization and post-functionalization a step towards polyoxometalate-based materials, A. Proust, B. Matt, R. Villanneau, G. Guillemot, P. Gouzerh, G. Izzet, Chem. Soc. Rev. Themed issue on Polyoxometalates, 2012, 41, 7605-7622
  11. Bifunctional Polyoxometalates for planar gold surfaces nanostructuration , D. Mercier, S. Boujday, C. Annabi, R. Villanneau, C.-M. Pradier, A. Proust, J. Phys. Chem. C, 2012, 116, 13217-13224 
  12. Polyoxometalates: Powerful Catalysts for Atom-Efficient Cyclopropanations, I. Boldini, G. Guillemot, A. Caselli, A. Proust, E. Gallo, Adv. Synth. Catal, 2010, 352, 2365-2370.
  13. Synthesis, Characterization of the Keggin type Ruthenium-Nitrido Derivative [PW11O39{RuN}]4- and Evidence of its Electrophilic Reactivity, V. Lahootun, C. Besson, R. Villanneau, F. Villain, L.-M. Chamoreau, K. Boubekeur, S. Blanchard, R. Thouvenot , A. Proust, J. Am. Chem. Soc. 2007, 129, 7127-7135
  14. Framework fluxionality of organometallic oxides : Structural and EXAFS 13- characterizations and DFT calculations on [{Ru(h6-arene)}4Mo4O16] complexes, D. Laurencin, E. Garcia Fiadalgo, R. Villanneau, F. Villain, P. Herson, J. Pacifico, H. Stoeckli-Evans, M. Bénard, M.-M. Rohmer, G. Süss-Fink, A. Proust, Chem. Eur. J., 2004, 10, 208-217
  15. Main group element, organic and organometallic derivatives of polyoxometalates, P. Gouzerh, A. Proust, Chem. Rev., 1998, 98, 77-111

List of publications from HAL