J. S. Beck, J. C. Vartuli, W. J. Roth, M. E. Leonowicz, C. T. Kresge et al., A new family of mesoporous molecular sieves prepared with liquid crystal templates, Journal of the American Chemical Society, vol.114, issue.27, pp.10834-10875, 1992.
DOI : 10.1021/ja00053a020

D. M. Pajerowski, J. E. Gardner, F. A. Frye, M. J. Andrus, M. F. Dumont et al., Photoinduced Magnetism in a Series of Prussian Blue Analogue Heterostructures, Chemistry of Materials, vol.23, issue.12, p.3045, 2011.
DOI : 10.1021/cm2003337

J. M. Leger, C. Loriers-susse, and B. Vodar, Pressure Effect on the Curie Temperatures of Transition Metals and Alloys, Physical Review B, vol.6, issue.11, p.4250, 1972.
DOI : 10.1103/PhysRevB.6.4250

A. Azizi, S. K. Sadrnezhaad, and A. Hasani, Morphology and magnetic properties of FeCo nanocrystalline powder produced by modified mechanochemical procedure, Journal of Magnetism and Magnetic Materials, vol.322, issue.21, p.3551, 2010.
DOI : 10.1016/j.jmmm.2010.07.004

Y. Martin and H. K. Wickramasinghe, Primary reference: Calculated from ICSD using POWD-12++ References Primary reference The Structure of Crystals, Appl. Phys. Lett. Phys. Chem. Miner. Gazz. Chim. Ital, vol.50, issue.58, pp.168-422, 1455.

Q. Subfiles and . Subfiles, Inorganic Corrosion Common Phase NBS pattern Quality: Star (S) References Primary reference: Natl References Primary reference: Natl, Bur. Stand. (U.S.) Monogr. Bur. Stand. (U.S.) Monogr, vol.25, issue.4, pp.22-32, 1966.

. Pdf-index-name, Cobalt Empirical formula: Co Chemical formula: Co References Primary reference: Dow Chemical Co, Private Communication Optical data: Data on Chem. for Cer. Use, Natl. Res. Council Bull, p.107

E. Cambridge and U. , Private Communication Unit cell: Wyckoff., The Structure of Crystals

A. Bordage, V. Trannoy, O. Proux, and H. Vitoux, In situ site-selective transition metal K-edge XAS: a powerful probe of the transformation of mixed-valence compounds, Phys. Chem. Chem. Phys., vol.12, issue.278, pp.17260-17265, 1039.
DOI : 10.1039/C5CP02591E

E. Delahaye, R. Moulin, M. Aouadi, V. Trannoy, and P. Beaunier, @Mesoporous Silica Monoliths: Tailor-Made Nanoreactors for Confined Soft Chemistry, Chemistry - A European Journal, vol.104, issue.47, pp.16906-16916, 2015.
DOI : 10.1002/chem.201501918

S. Ferlay, T. Mallah, R. Ouahes, P. Veillet, and M. Verdaguer, A room-temperature organometallic magnet based on Prussian blue, Nature, vol.3, issue.6558, pp.701-703, 1995.
DOI : 10.1038/378701a0

O. Sato, T. Iyoda, A. Fujishima, and K. Hashimoto, Photoinduced Magnetization of a Cobalt-Iron Cyanide, Science, vol.272, issue.5262, pp.704-705, 1996.
DOI : 10.1126/science.272.5262.704

A. Ludi and H. Güdel, Structural chemistry of polynuclear transition metal cyanides, Inorganic Chemistry; Structure and Bonding, vol.14
DOI : 10.1007/BFb0016869

C. J. Brinker and G. W. Scherer, Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing, 1990.

C. T. Kresge, M. E. Leonowicz, W. J. Roth, J. C. Vartuli, and . Beck, Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism, Nature, vol.359, issue.6397, pp.710-71210359710, 1038.
DOI : 10.1038/359710a0

P. H. Mutin, G. Guerrero, and A. Vioux, Organic???inorganic hybrid materials based on organophosphorus coupling molecules: from metal phosphonates to surface modification of oxides, Comptes Rendus Chimie, vol.6, issue.8-10, pp.1153-1164, 2003.
DOI : 10.1016/j.crci.2003.07.006

G. Guerrero, P. H. Mutin, and A. Vioux, Anchoring of Phosphonate and Phosphinate Coupling Molecules on Titania Particles, Chemistry of Materials, vol.13, issue.11, pp.4367-4373, 2001.
DOI : 10.1021/cm001253u

M. Faustini, G. L. Drisko, C. Boissiere, and D. Grosso, Liquid deposition approaches to self-assembled periodic nanomasks, Scripta Materialia, vol.74, pp.13-18, 2014.
DOI : 10.1016/j.scriptamat.2013.07.029

URL : https://hal.archives-ouvertes.fr/hal-01289925

S. Tricard, C. Fabrice, T. D. Mallah, and . Trans, doi:10.1039/c3dt51636a work was supported by the C'Nano network via contract AF2012-a1-12 EPIMAGE. The adaptation of the spectrometer at 1 m was supported by a grant from Labex OSUG@2020, pp.15835-15845, 2013.

H. W. Boubnov, D. E. Carvalho, T. Doronkin, E. Günter, A. J. Gallo et al., Selective Catalytic Reduction of NO Over Fe-ZSM-5: Mechanistic Insights by Operando HERFD-XANES and Valence-to-Core X-ray Emission Spectroscopy, Journal of the American Chemical Society, vol.136, issue.37, pp.13006-13015, 2014.
DOI : 10.1021/ja5062505

. Fig, X-ray emission spectra of the Co 2+ (upper curves) and Co 3+ (lower curves) references Co 2+ ?O for a Co 2+ ?OH 2 bond, Co 2+ ?N for a Co 2+ ?NC bond, Co 3+ ?C for a Co 3+ ?CN bond and Co 3+ ?N for a Co 3+ ?NC bond. (b) Comparison of the Co 2+ and Co 3+ site-selective XANES spectra of Co-PBA@400 1C extracted using Co 3+ ?C (upper curves) or Co 3+ ?N (lower curves) as a reference for the +III oxidation state, The dotted (resp. dashed) lines are guides to compare the energy of the Co 2+ (resp. Co 3+ ) spectral features, 2015.

F. Amalraj and D. Aurbasch, The use of in situ techniques in R&D of Li and Mg rechargeable batteries, Journal of Solid State Electrochemistry, vol.3, issue.23, pp.877-890, 2011.
DOI : 10.1007/s10008-011-1324-9

C. Singh, J. A. Lamberti, and . Van-bokhoven, Advanced X-ray absorption and emission spectroscopy: in situ catalytic studies, Chemical Society Reviews, vol.12, issue.8, pp.4754-4766, 2010.
DOI : 10.1039/c0cs00117a

W. Kanan, J. Yano, Y. Surendranath, M. Dinca, V. K. Yachandra et al., Structure and Valency of a Cobalt???Phosphate Water Oxidation Catalyst Determined by in Situ X-ray Spectroscopy, Journal of the American Chemical Society, vol.132, issue.39, pp.13692-13701, 2010.
DOI : 10.1021/ja1023767

B. Leriche, S. Hamelet, J. Shu, M. Morcrette, C. Masquelier et al., An Electrochemical Cell for Operando Study of Lithium Batteries Using Synchrotron Radiation, Journal of The Electrochemical Society, vol.157, issue.5, pp.606-610, 2010.
DOI : 10.1149/1.3355977

URL : https://hal.archives-ouvertes.fr/hal-00477327

G. Grush, K. Christou, S. Hämäläinen, and . Cramer, Site-Selective XANES and EXAFS: A Demonstration with Manganese Mixtures and Mixed-Valence Complexes, Journal of the American Chemical Society, vol.117, issue.21, pp.5895-5896, 1995.
DOI : 10.1021/ja00126a047

U. Glatzel and . Bergmann, High resolution 1s core hole X-ray spectroscopy in 3d transition metal complexes???electronic and structural information, Coordination Chemistry Reviews, vol.249, issue.1-2, pp.65-95, 2005.
DOI : 10.1016/j.ccr.2004.04.011

T. Lee, U. Petrenko, F. Bergmann, S. Neese, and . Debeer, Probing Valence Orbital Composition with Iron K?? X-ray Emission Spectroscopy, Journal of the American Chemical Society, vol.132, issue.28, pp.9715-9727, 2010.
DOI : 10.1021/ja101281e

E. Alonso-mori, G. Paris, S. G. Giuli, M. Eeckhout, M. Kavcic et al., Sulfur-Metal Orbital Hybridization in Sulfur-Bearing Compounds Studied by X-ray Emission Spectroscopy, Inorganic Chemistry, vol.49, issue.14, pp.6468-6473, 2010.
DOI : 10.1021/ic100304z

P. Bergmann and . Glatzel, X-ray emission spectroscopy, Photosynthesis Research, vol.314, issue.38, pp.255-266, 2009.
DOI : 10.1007/s11120-009-9483-6

T. Vanko, G. Neisius, F. Molnar, S. Renz, A. Karpati et al., Probing the 3d Spin Momentum with X-ray Emission Spectroscopy:?? The Case of Molecular-Spin Transitions, The Journal of Physical Chemistry B, vol.110, issue.24, pp.11647-11653, 2006.
DOI : 10.1021/jp0615961

URL : https://hal.archives-ouvertes.fr/hal-00128311

-. Kühn, J. Hormes, N. Matoussevitch, H. Bönnemann, and P. Glatzel, Site-Selective High-Resolution X-ray Absorption Spectroscopy and High-Resolution X-ray Emission Spectroscopy of Cobalt Nanoparticles, Inorganic Chemistry, vol.53, issue.16, pp.8367-8375, 2014.
DOI : 10.1021/ic5000183

-. Kühn, W. Caliebe, N. Matoussevitch, H. Bönnemann, and J. Hormes, Site-selective X-ray absorption spectroscopy of cobalt nanoparticles, Applied Organometallic Chemistry, vol.22, issue.8, pp.577-584, 2011.
DOI : 10.1002/aoc.1805

P. Lambertz, K. Chernev, N. Klingan, K. Leidel, T. Sigfridsson et al., Electronic and molecular structures of the active-site H-cluster in [FeFe]-hydrogenase determined by site-selective X-ray spectroscopy and quantum chemical calculations, Chemical Science, vol.133, issue.3, pp.1187-1203, 2014.
DOI : 10.1039/c3sc51700d

P. Leidel, K. Chernec, S. Havelius, S. Ezzaher, M. Ott et al., Site-Selective X-ray Spectroscopy on an Asymmetric Model Complex of the [FeFe] Hydrogenase Active Site, Inorganic Chemistry, vol.51, issue.8, pp.4546-4559, 2012.
DOI : 10.1021/ic2024154

E. Trannoy, G. Delahaye, P. Fornasieri, A. Beaunier, and . Bleuzen, Using Prussian blue analogue nanoparticles confined into ordered mesoporous silica monoliths as precursors of oxides, Comptes Rendus Chimie, vol.17, issue.6, pp.512-520, 2014.
DOI : 10.1016/j.crci.2014.02.001

URL : https://hal.archives-ouvertes.fr/hal-01078316

J. Buser, D. Schwarzenbach, W. Peter, and A. Lüdi, The crystal structure of Prussian Blue: Fe4[Fe(CN)6]3.xH2O, Inorganic Chemistry, vol.16, issue.11, pp.2704-2710, 1977.
DOI : 10.1021/ic50177a008

C. Bleuzen, V. Lomenech, F. Escax, F. Villain, and . Varret, = Alkali Cation). 1. Conditions to Observe the Phenomenon, Journal of the American Chemical Society, vol.122, issue.28, pp.6648-6652, 2000.
DOI : 10.1021/ja000348u

A. Vanko, P. Bordage, E. Glatzel, M. Gallo, W. Rovezzi et al., Spin-state studies with XES and RIXS: From static to ultrafast, Journal of Electron Spectroscopy and Related Phenomena, vol.188, pp.166-171, 2013.
DOI : 10.1016/j.elspec.2012.09.012

P. Vanko, V. Glatzel, R. Pham, D. Abela, C. N. Grolimund et al., Picosecond Time-Resolved X-Ray Emission Spectroscopy: Ultrafast Spin-State Determination in an Iron Complex, Angewandte Chemie International Edition, vol.131, issue.34, pp.5910-5912, 2010.
DOI : 10.1002/anie.201000844

J. Badro, G. Rueff, G. Vanko, G. Monaco, F. Fiquet et al., Electronic Transitions in Perovskite: Possible Nonconvecting Layers in the Lower Mantle, Science, vol.305, issue.5682, pp.383-386, 2004.
DOI : 10.1126/science.1098840

URL : https://hal.archives-ouvertes.fr/hal-00087150

T. Glatzel, K. Weng, J. Kvashnina, M. Swarbrick, E. Sikora et al., Reflections on hard X-ray photon-in/photon-out spectroscopy for electronic structure studies, Journal of Electron Spectroscopy and Related Phenomena, vol.188, pp.17-25, 2013.
DOI : 10.1016/j.elspec.2012.09.004

M. Glatzel, G. Sikora, M. Smolentsev, and . Fernandez-garcia, Hard X-ray photon-in photon-out spectroscopy, Catalysis Today, vol.145, issue.3-4, pp.294-299, 2009.
DOI : 10.1016/j.cattod.2008.10.049

M. Giorgetti, A. Berrettoni, P. J. Filipponi, R. Kulesza, and . Marassi, Evidence of four-body contributions in the EXAFS spectrum of Na2Co[Fe(CN)6], Chemical Physics Letters, vol.275, issue.1-2, pp.108-112, 1997.
DOI : 10.1016/S0009-2614(97)00724-0

T. Yokoyama, O. Ohta, K. Sato, and . Hashimoto, Characterization of magnetic CoFe cyanides by x-ray-absorption fine-structure spectroscopy, Physical Review B, vol.58, issue.13, pp.8257-8266, 1998.
DOI : 10.1103/PhysRevB.58.8257

A. Curry and W. A. Runciman, A neutron-diffraction study of potassium cobalticyanide, Acta Crystallographica, vol.12, issue.9, pp.674-677, 1959.
DOI : 10.1107/S0365110X59001979