Tressaud Alain

Alain Tressaud's web page

Personnel CNRS
– Directeur de Recherche Émérite / Groupe 3
– Vice-President, European Academy of Sciences, Brussels (2018-2024)
– contact : pré / poste 6301 (ligne directe 054000+poste)


Domains of competence : Fluorine chemistry, fluoride materials, mixed-anion compounds / Carbon-Fluorine Systems ; Graphite intercalation compounds / Modification of the properties of materials by surface treatments / Solid State Chemistry & Materials Sciences

Education and scientific position

– Dr. 3rd cycle, Univ. Bordeaux (1967)
– Dr. es Sciences Physiques, Univ. Bordeaux (1969)
– Chargé Recherche, CNRS (1969)
– NATO Fellow, Univ. California, Berkeley [Prof. Neil Bartlett] (1972)
– Maître Recherche, CNRS (1976)
– Research Director, CNRS (1982) (Emeritus, since 2009)

Scientific Activities & Awards
– Invited Scientist at : University California, Berkeley (1982), Philipps Universität, Marburg (1982), Kyoto University (1986), Universidad La Laguna, Spain (1991), NPL, New Delhi, (1994), Assoc. Scientist, Inst. Jozef Stefan, Ljubljana (since 1998), Aichi Institute Technology, Japan (2000) ; Guest Professor, Kyoto Univ. (2009) ; Guest Professor, Southeast Univ, Nanjing, China (2019 →).
– Founder and chairman, “CNRS French Network on Fluorine” (2002 -2008)
– Scientific administrator of the International Henri Moissan Prize (since 2006)
– Vice-President, “European Academy of Sciences”, EURASC, Belgium (Former President 2017-18)
– Grand prix CEA de l’Académie des sciences (2008)
– Member, “Academia Scientiarum & Artium Europæa”, Salzburg, Austria (since 2009)
– Member, Executive Committee, Fluorine Division, American Chemical Society (2009)
– “Award for creative work in fluorine chemistry”, American Chemical Society (2011)
– “Henri Moissan International Award” (2012)
– Distinguished Fellow, SCF, France (2015)
– Member, World Society of Sustainable Energy Technologies, Nottingham, UK (2018)
– “Tressaud International Symposium on Solid State Chemistry for Applications and Sustainable Development”, Sustainable Industrial Processing Summit, SIPS-29, Cyprus, (2019)
– Fray International Sustainability Award (2019)

Chairman (co-Chairman)- of International Scientific Symposia
9thISIC, Arcachon (1997) – 13thESFC), Bordeaux, (2001) – Symposium in honour of Prof. N. Bartlett, 224th ACS Meeting, Boston, (2002) – French-Japanese Seminars on Inorganic Fluorides (FJSF) : Sarlat, France (1993), Paris (2003), Kyoto (2005), Nice (2015) – Intersiberian International Seminars on Advanced Inorganic Fluorides (ISIF), Novosibirsk (2003), Tomsk (2006), Vladivostok(2008) – Centenary of Henri Moissan’s Nobel Prize, Paris (2006) – Novel bonding and structural modalities in Inorganic Fluorine Chemistry, 234th ACS Meeting, Boston, (2007) -FMEC-1, Bordeaux(.2010) FMEC-2 (2013) -1st IISFC, Delhi (Feb.2012) – Honorary Chairman 17thESFC, Paris (2013) – co-Chairman 2nd IISFC, Hyderabad (2014).

Editorial Duties
– Co-Editor of the book « Advanced Inorganic Fluorides », Elsevier (2000)
– Editor-in-Chief of the series of books “Advances in Fluorine Science”, Elsevier, Amsterdam : Vol. 1 and Vol. 2 : Fluorine & the Environment (2006), Vol. 3 : “Fluorine & Health” (2008)
– Editor “Functionalized Inorganic Fluorides”, Wiley-Blackwell, Oxford, UK, (2010)
– Guest Editor of several issues of Mol. Cryst. Liq. Cryst. (1998), J. Fluor. Chem. (2001, 2002, 2006, 2007, 2012), Solid State Sciences (2002). Special issue of “Actualité Chimique”, the journal of the French Chemical Society devoted to “Fluorine chemistry and fluoride materials”, (2006)
– “Le fluor : histoire, applications et paradoxes”, A. Tressaud (in French) CNRS-Editions (2011) ;
– “Progress in Science, Progress in Society”, Proceedings 2016-EurASc Symposium, Springer (2018)
– Founding Editor, “Progress in Fluorine Science“, Elsevier, a series of 5 books (2016-2019).
– “Fluorine, a Paradoxical Element”, A. Tressaud, Elsevier (2019)



Research activities

Keywords : Fluorine chemistry ; fluoride materials ; mixed-anion compounds ; carbon-fluorine systems ; rf-plasma fluorination, magnetic fluorides.

My scientific interests have been focused on Solid State Chemistry of Fluorinated Materials. In addition to the search of new synthetic routes and outstanding physical properties, the effect of nanostructuration and/or surface treatments on the physical-chemical characteristics of materials have also been investigated.
New series of ferrimagnets and ferromagnets : Most series of the families of ferrimagnetic and ferromagnetic fluorides were synthesized and characterized at Bordeaux. The discovery of these new types of magnetic compounds brought big interest to i)solid state physicists for providing experimental objects allowing them to test theoretical magnetic ordering models, ii)crystallographers and solid state chemists because of original architectures consisting of networks of layers, chains, trimers, tetramers, rings, etc.
High or unusual oxidation states in d-transition elements : Ni3+, Cu3+ in cryolite-type phases, Co4+, Cu4+ in K2PtCl6-type compounds can be quoted as examples. The investigation of mixed-valent palladium in Pd2F6 yielded a unique increase of the electrical conductivity by six powers of ten under 50kbars, the highest jump ever observed in à fluoride.
Investigations on various types of carbon-fluorine systems have allowed to approach the fundamental aspects of intercalation processes in graphite and in carbonaceous materials. Most behaviours could be elucidated in terms of charge transfer, electronic configuration of guest species, dimensionality of the magnetic interactions. The outstanding properties can be illustrated by extremely high conductivity values, i.e. in metal fluoride-GICs or in fluorine-intercalated graphite fibres : σ(C10-14F) = 4 x105 Scm-1, approaching the conductivity of copper. In the domain of energy storage, rf-plasma fluorination of carbon anodes allows increasing the capacity of Li-ion batteries by more than 15 %. In primary Li batteries, the use of fluorinated nano-carbon particles (F-NCP) gives higher OCV and suppress the potential delay generally observed during the first time of the discharge reaction with commercial graphite fluorides (Cooperation H. Groult, PHENIX, Sorbonne University).
Effect of nanostructuration and/or surface treatments on the physical-chemical characteristics of materials (Cooperation A. Demourgues, D. Dambournet, E. Durand, ICMCB) can be illustrated in
– Synthesis of thermally stable Al and Fe oxy(hydroxyl)fluorides as catalysts for the synthesis of CFCs substitutes,
– Determination of the electronic transitions at the origin of absorption in the visible range for rare-earth (oxy-)fluorosulfides, and the use of these materials as red or yellow pigments (Rhone-Poulenc patent, 1993),
– New series of oxyfluorinated UV absorbers for the protection of wood and various materials,
– Chemical storage and secured delivery of fluorine (Comurhex-Areva patent, 2006)
– Improvement of surface properties of polymers treated with F2 or fluoro-gases in rf-plasma conditions.

Many of my investigations have been carried out in the scope of varied international cooperations : USA (N. Bartlett (†) ; J.B. Goodenough), Japan (N. Watanabe(†), T. Nakajima , H.Touhara), Russia (I. Flerov, L. Demyanova), Germany (D. Babel).
Beside the importance of the information obtained in all above fields at the fundamental level, numerous applications have been found in the scope of programs with industry, dealing with : catalysis and fine chemistry / medical techniques and biomaterials / nuclear industry / automotive / wood protection/ microelectronics and optics / energy storage, etc.


Scientific production and supervision

– More than 360 papers in International Journals and 12 internationalized patents,
– More than 65 invited lectures in International symposia and more than 60 invited seminars in Industry or University centres,
– Numerous cooperative programmes with 12 different countries,
– Invited Editor of 10 special issues of scientific journals,
– More than 20 chapters in books,
– Editor of 12 books including the responsibility of Editor-in-Chief of the book series “Advances in Fluorine Science” (2006-2008), and “Progress in Fluorine Science” (2016), Elsevier.


10 Relevant publications

Fluoride Abstraction as a Synthetic Tool in Coordination Chemistry : trans-[MF4(CN)2]2− (M = Re, Os), J.L. Liu, K. S. Pedersen, et al., Angew. Chem. Internat. Ed. (2020)

Use of inorganic fluorinated materials in lithium batteries and in energy conversion systems, H. Groult, A. Tressaud, Chem.Commun. 54, 11375, (2018)

Iridates from the molecular side, K. S. Pedersen, J. Bendix, A. Tressaud et al., Nature Commun., 7, 12195 (2016)

 Heat capacity and magnetic properties of fluoride CsFe2+Fe3+F6 with defect pyrochlore structure, M.V. Gorev, I.N. Flerov, A. Tressaud et al., J. Solid State Chem. 23, 7330-335 (2016)

Crystal Chemistry and Selected Physical Properties of Inorganic Fluorides and Oxide-Fluorides, M. Leblanc, V. Maisonneuve, A. Tressaud, Chem. Rev. 115, 1191-1254 (2015).

Comparison of the surface modification of polymers treated with elemental fluorine and fluoro-containing rf-plasma, A.P. Kharitonov, et al. J. Fluor. Chem., 165, 49-60 (2014).

Mixed Lithium Insertion and Conversion Mechanism in a Titanium-based Mixed Anion Nanocomposite, D. Dambournet et al. JACS, 133 13240-13243 (2011).

Surface modification of phyllosilicate minerals by fluorination methods, A. Tressaud et al., J. Vac. Sci.Technol. A 28 (2) 373-381 (2010).

Electrochemical formation of carbon nano-powders with various porosities in molten alkali carbonates, K. Le Van et al. Electrochem. Acta, 54, 4566–4573 (2009).

Highly fluorinated silica obtained by direct F2-gas fluorination : Stability and NMR studies, E. Lataste et al. J. Phys. Chem. C, 113 (2009) 18652 – 18660.