Chastanet Guillaume

Guillaume Chastanet's web page

Personnel CNRS
– Chargé de Recherche / Groupe 6
– Contact : pré / poste 8323 (ligne directe 054000+poste)

Compétences : Coordination chemistry / Molecular magnetism and photomagnetism / Photoswitching / Multistability / Switchable nanoparticles / Molecular materials

Education and scientific position

2016 – Director of the French network on Molecular switching and magnetism (> 200 researchers)
2015 – Habilitation à Diriger les Recherches (HDR), diploma from University of Bordeaux in physical-chemistry of condensed matter : Light(s) on molecular magnetism
2014 – Head of the switchable molecules and materials group (ICMCB, 8 permanent researchers)
2009 – Junior CNRS researcher, University of Bordeaux, Institute of Chemistry of Condensed Matter (ICMCB), in Jean-François Létard’s group
2005-2009 – Junior CNRS researcher, University of Lyon 1, Laboratory of Multimaterials and Interfaces (LMI), in Pr. Dominique Luneau’s group.
2003-2005 – Post-doc, University of Florence, Laboratory of Molecular Magnetism (LaMM), Pr. Dante Gatteschi’s group
2002-2003 – Post-doc, University of Louvain La Neuve (Belgium), Laboratory of microelectronic, Pr. Vincent Bayot’s group
2002 – PhD in physical-chemistry of condensed matter, Université Bordeaux 1. Advisor : J.-F. Létard and (the late) Olivier Kahn (ICMCB). Photomagnetism of spin crossover materials.

Research activities

My scientific activities concern the elaboration of (photo)switchable molecular materials based on spin crossover phenomenon. The main objectives are :
 To favor and study the photoswitching at room temperature using different approaches such irradiation inside hysteresis loops, increase of the lifetime of the photo-induced LIESST state, promotion of elastic frustration and geometrical distortion.
 The downsizing approach to obtain pure or hybrid photo(switchable) nanoparticles (using micelle technics, flow chemistry and microfluidics).
These objectives are driven by the target of an efficient reversible photoswitching at room temperature in both (nano)materials and molecules with the ultimate goal to implement them in electronic devices. It requires the understanding of the mechanisms governing the thermal spin crossover to favor a wide room temperature memory effect and the lifetime of the photo-induced state. It also leads to the development of multistability and multisensitive systems to enrich their capabilities of addressing and storing information.

International Collaborations

Chérif Baldé (LCPM, Ziguinchor, Senegal)
Keith Murray (MMM, Monash, Australia)
Cameron J. Kepert (Sydney, Australia)
Suzanne M. Neville (Sydney, Australia)
Maria Vaz (MagMol, Rio, Brazil)
Miguel Novak (Rio, Brazil)
Malcom A. Halcrow (SC, Leeds, UK)
David Harding (FunTech, Walailak, Thailand)
Birgit Weber (Bayreuth, Germany)
Jose-Ramon Gallan-Mascaros (Tarragone, Spain)
Peter Dowben (Lincoln, Nebraska USA)
Tatiana Palamarciuc (Chisinau, Moldavia)
Yacine Bouhedja, Rachid Delimi and Hacene Bendjefall (Annaba, Algeria)
Vassili Tangoulis (LIC, Patras, Greece)
Paulo N. Martinho (Lisbon, Portugal)
Kishalay Bahr (Rasjasthan, India)

National Collaborations

Eric Freysz (LOMA, Bordeaux),
Stéphane Mornet (ICMCB, Bordeaux)
Cyril Aymonier and Samuel Marre (ICMCB, Bordeaux)
Boris Le Guennic (ISCR, Rennes)
Bernard Doudin (IPCMS, Strasbourg)
Smail Triki (CEMCA, Brest)
Kamel Boukheddaden (GeMaC, Versailles)
Sébastien Pillet (CRM2, Nancy)
Eric Collet (IPR, Rennes)

Scientific production and supervision

92 articles published / 2 book chapter

7 invited talks in national and international conferences / 9 invited seminars

12 oral presentations (author) / 15 poster presentations (author)

Supervision : 7 PhD (currently 4), 1 post-doctoral fellow, 3 Master students and 8 undergraduate students

Teaching activities

Invited lectures in Annaba University (6 hours) : Molecular Magnetism

Invited lecture in Walailak University (Thailand) (6 hours) : Photo-induced Spin Crossover

Relevant publications

 A critical review of the T(LIESST) temperature in spin crossover materials – what it is and what it is not, G. Chastanet*, C. Desplanches, C. Baldé, P. Rosa, M. Marchivie, P. Guionneau Chem.Sq. 2018, 2, 1

- Light-Induced Spin crossover – solution and solid state processes, G. Chastanet*, M. Lorenc*, R. Bertoni, C. Desplanches, C.R. Chimie. 2018, 21, 1075.

 Hidden hysteretic behavior ofa paramagnetic iron(II) network revealed by light irradiation, M. Mguenar Ndiaye, S. Pillet, E.-. Bendeif, M. Marchivie*, G. Chastanet*, K. Boukheddaden, S. Triki*, Eur. J. Inorg. Chem. 2018, 3, 305.

 Thermal spin-crossover with a large hysteresis spanning room temperature in a mononuclear complex, E. Tailleur, M. Marchivie, N. Daro, G. Chastanet, P. Guionneau, Chem. Commun. 2017, 53, 4763.

 Grafting of gold onto spin-crossover nanoparticles : SCO@Au, L. Moulet, N. Daro, S. Mornet, N. Vilar-Vidal, G. Chastanet, P. Guionneau, Chem. Commun. 2016, 52, 13213.

 Elastic Frustration Triggering Photoinduced Hidden Hysteresis and Multistability in a Two-Dimensional Photoswitchable Hofmann-Like Spin-Crossover Metal Organic Framework, E. Milin, V. Patinec, S. Triki, E.-E. Bendeif, S. Pillet, M. Marchivie, G. Chastanet, K. Boukheddaden, Inorg. Chem. 2016, 55, 11652.

 Optimizing the stability of trapped metastable spin states, J.-F. Létard, G. Chastanet, P. Guionneau, C. Desplanches, In Spin-crossover materials : properties and applications, Ed. M. A. Halcrow, John Wiley & sons, Ltd 2013, 475.

 Hysteretic three-step spin crossover in a thermo- and photo-chromic 3D pillared Hofmann-type metal-organic framework, N. F. Sciotino, K. R. ScherlGruenwald, G. Chastanet, G. J. Halder, K.W. Chapman, J.-F. Létard, C.J. Keppert, Angew. Chem. Int. Ed. Engl. 2012, 51, 10154.