ORALS

SESSION: NanomaterialsFriAM1-R3	Echegoyen International Symposium (8th Intl. Symp. on Synthesis & Properties of Nanomaterials for Future Energy Demands)
Fri. 1 Dec. 2023 / Room: Dreams 3
Session Chairs: Ovidiu Crisan; Session Monitor: TBA

09:05: [NanomaterialsFriAM103] OL
NANOFLUORIDES IN MATERIAL SCIENCES, ENERGY SYSTEMS, PHOTONICS, AND MEDICINAL CHEMISTRY
Alain Tressaud¹ ; ¹ICMCB-CNRS, University Bordeaux, Pessac, France;
Paper Id: 78 [Abstract]

Inorganic fluorine-based compounds are found today as nano-components in many applications, including energy storage and conversion, photonics, electronics, medicinal chemistry, and more [1]. The strategic importance of nano-fluorinated materials can be illustrated by several examples drawn from various scientific fields. In the field of energy storage, fluorinated carbon nanoparticles (F-CNPs) are tested as active materials in primary lithium batteries, while 3d-transition metal fluorides and oxyfluorides, mainly iron-, cobalt- and titanium- based have been proposed as electrodes in secondary batterie(reversible) s. In all-solid-state batteries, materials derived from fluorite- (CaF2) or tysonite- (LaF3) structural types can be used as solid electrolytes, provided the F- anions are highly mobile. Nanocrystalline rare-earth fluorides are currently used for their photoluminescent properties at the micro- or nanoscale. Functionalized nanoparticles and nanostructured compounds based on solid-state inorganic fluorides are used in many other advanced fields, including fluorinated graphene quantum dots (FGQDs), solar cells (DSSC, QDSSC), transparent conducting films (TCF), solid state lasers, nonlinear optics (NLO), UV absorbers, etc. Their role is also decisive in medicine and biotechnologies [2], where doped rare-earth fluoride nanocrystals serve as luminescent biomarkers thanks to their up- and down-conversion properties, allow fluorine labeling of nanoparticles and in-vivo 19F NMR. Relevant nanotherapeutics include photodynamic therapy (PDT), luminescent thermometry, radiotracers for positron emission tomography (PET), theranostic nano-agents that incorporate both imaging probes and therapeutic media, and are therefore capable of carrying out both diagnosis and therapy within the same nano-object. References

References:
[1] “Progress in Fluorine Science”, A. Tressaud Series Editor, Elsevier, Vol. 1, “Photonic & Electronic Properties of Fluoride Materials”, A.Tressaud & K. Poeppelmeier Eds. (2016). // Vol. 2 “New Forms of Fluorinated Carbons”, O. Boltalina & T. Nakajima, Eds. (2016). // Vol. 3 “Modern Synthesis Processes and Reactivity of Fluorinated Compounds”, H. Groult, F. Leroux & A. Tressaud, Eds. (2017). // Vol. 4 “Fluorine & Health: Pharmaceuticals, Medicinal Diagnostics, and Agrochemicals”, G. Haufe, & F. Leroux Eds. ( 2018). [2] Fluoride Nanoparticles for Biomedical Applications, M.S.Pudovkin, R.M.Rakhmatullin, in: “Nanoparticles in Medicine”, Shukla, A. (ed), Springer (2020). https://doi.org/10.1007/978-981-13-8954-2_5

SESSION: SolidStateChemistryWedPM1-R4	Poeppelmeier International Symposium(3rd Intl Symp on Solid State Chemistry for Applications & Sustainable Development)
Wed. 29 Nov. 2023 / Room: Dreams 4
Session Chairs: Paul Salvador; Session Monitor: TBA

14:05: [SolidStateChemistryWedPM105] OL
SOLID-STATE CHEMISTRY OF TRANSITION METAL FLUORIDES: FROM FLUOROPEROVSKITES TO INORGANIC NANOFLUORIDES - PHYSICAL-CHEMICAL PROPERTIES AND APPLICATIONS
Alain Tressaud¹ ; ¹ICMCB-CNRS, University Bordeaux, Pessac, France;
Paper Id: 80 [Abstract]

In transition metal fluorides, the fairly strong ionic character of the M-F bonding between fluoride and metal allows a better understanding of most of their electronic properties such as conductivity, transport properties, optical behavior, multiferroism. For example the varied observed magnetic bahiviors: ferro-, antiferro-, ferri-, low-dimensional- magnetisms, can be interpreted easily following the Goodenough superexchange rules[1, 2]. The physicochemical properties of transition metal fluorides can generally be inferred from the types of bonds occurring in the structural networks and connected with the magnetic structures [3]. Inorganic fluorinated materials are found as components in many applications, including energy storage and conversion, photonics, electronics, medicinal chemistry, etc [4]. The strategic importance of these materials will be illustrated by several examples taken from various scientific domains: Fluoride materials used as electrodes in Li-ion batteries and in catalysis / Nanocrystalline fluorides derived from fluorite- (CaF2) or tysonite- (LaF3) types used as solid electrolytes in All-solid-state batteries utilizing the high mobility of F- anions / Rare-earth based fluorides used as up- and down-conversion luminophores, at the micro- or nanoscale / Multiferroic d-transition metal fluorides derived from the perovskite, i.e. layered BaMF4 or TTB-K3Fe5F15, in which magnetism and ferroelectricity coexist / Fluorine-based superconductors obtained by F-doping in cuprate systems La2CuO4 and Sr2CuO3 or in F-doped oxypnictide LnFePnO1-xFx [5]. Finally, solid-state inorganic nanofluorides are used in many other advanced domains such as dye-sensitized solar cell, transparent conducting films, solid state lasers, nonlinear optics, UV absorbers, frequency doubling. Their role is also decisive in medicine and biotechnologies, where nano-crystals of doped rare-earth fluorides can be used as theranostic nano-agents integrating both imaging probes and therapeutic media, and are therefore able to perform diagnostic and therapy within a single nano-object.

References:
[1] Magnetism and the Chemical Bond, J. B. Goodenough, Interscience Publ. (1963) [2] Crystal chemistry and magnetic properties of CrIIBIIIF5 compounds, A. Tressaud, J.M. Dance, J. Ravez, J. Portier, P. Hagenmuller, J.B. Goodenough, Mat. Res. Bull., 8, 1467, (1973). [3] Crystal Chemistry and Selected Physical Properties of Inorganic Fluorides and Oxide-Fluorides, M. Leblanc, V. Maisonneuve, A. Tressaud, Chem. Rev. 115, 1191(2015). [4] Photonic & Electronic Properties of Fluoride Materials, A.Tressaud & K. Poeppelmeier Eds., Vol. 1 “Progress in Fluorine Science”, A. Tressaud Series Editor, Elsevier, (2016). [5] Fluorine, a Paradoxical Element, A. Tressaud, Elsevier (2019).