showing 26 related works from this author
Guest induced reversible on–off switching of elastic frustration in a 3D spin crossover coordination polymer with room temperature hysteretic behavio…
2021
A binary reversible switch between low-temperature multi-step spin crossover (SCO), through the evolution of the population γHS(T) with high-spin (HS)-low-spin (LS) sequence: HS1LS0 (state 1) ↔ HS2/3LS1/3 (state 2) ↔ HS1/2LS1/2 (state 3) ↔ HS1/3LS2/3 (state 4) ↔ HS0LS1 (state 5), and complete one step hysteretic spin transition featuring 20 K wide thermal hysteresis centred at 290 K occurs in the three-dimensional (3D) Hofmann-type porous coordination polymer {FeII(3,8phen)[Au(CN)2]2}·xPhNO2 (3,8phen = 3,8-phenanthroline, PhNO2 = nitrobenzene), made up of two identical interpenetrated pcu-type frameworks. The included PhNO2 guest (x = 1, 1·PhNO2) acts as a molecular wedge between the interp…
Wavelength selective light-induced magnetic effects in the binuclear spin crossover compound{[Fe(bt)(NCS)2]2(bpym)}
2007
Using Fourier transform infrared spectroscopy, x-ray diffraction, and magnetic susceptibility measurements under light irradiation, the selective light-induced excited spin state trapping (LIESST) and the reversible-LIESST effect have been evidenced and studied in depth in the binuclear spin crossover compound {[Fe(bt)(NCS)2]2bpym}. In this system, each magnetic site can switch from low spin (LS) to high spin (HS), so that three states exist, namely, the LS-LS, HS-LS, and HS-HS. All these techniques shine a new light on the high phototunability of this system. In addition to the direct photoswitching from the LS-LS to the HS-LS or to the HS-HS state, here we show that photoinduced switching…
Symmetry breakings in a metal organic framework with a confined guest
2020
The MOF $[{\text{Fe(tvp)}}_{2}{(\text{NCS})}_{2}]\ifmmode\cdot\else\textperiodcentered\fi{}2\text{BzCHO}$ is demonstrated to undergo a complex sequence of phase transitions and spin-crossover behavior of its constitutive ${\text{Fe}}^{\text{II}}$ ions upon adsorption of benzaldehyde guest molecules. Our study, combining Raman and synchrotron x-ray diffraction measurements on a single crystal, reveals that the conversion from the pure high-spin to the pure low-spin phases implies a rich sequence of intermediate phases, with symmetry breaking forming at least three different space groups. These different symmetries involve spin-state ordering, ligand ordering, and guest ordering, interpreted …
Innenrücktitelbild: First Step Towards a Devil's Staircase in Spin-Crossover Materials (Angew. Chem. 30/2016)
2016
Inside Back Cover: First Step Towards a Devil's Staircase in Spin-Crossover Materials (Angew. Chem. Int. Ed. 30/2016)
2016
International audience; Periodic and aperiodic spin-state concentration waves form during “Devil's staircase”-type spin-crossover in a new bimetallic 2D coordination polymer {Fe[(Hg(SCN)3)2](4,4′-bipy)2}n. In their Communication on page 8675 ff., J. A. Real, E. Collet et al. describe the appearance of spin-state concentration waves between long-range spatially ordered structures of low- and high-spin states during multistep spin-crossover.
Formation of local spin-state concentration waves during the relaxation from photoinduced state in a spin-crossover polymer
2017
The complex relaxation from the photoinduced high-spin phase (PIHS) to the low-spin phase of the bimetallic two-dimensional coordination spin-crossover polymer [Fe[(Hg(SCN)3)2](4,4′-bipy)2]nis reported. During the thermal relaxation, commensurate and incommensurate spin-state concentration waves (SSCWs) form. However, contrary to the steps forming at thermal equilibrium, associated with long-range SSCW order, the SSCWs forming during the relaxation from the PIHS phase correspond to short-range order, revealed by diffuse X-ray scattering. This is interpreted as resulting from the competition between the two types of SSCW order and another structural symmetry breaking, due to ligand ordering,…
Charge-transfer driven by ultrafast spin-transition in a CoFe Prussian blue analogue
2020
Photoinduced charge-transfer is an important process in nature and technology and is responsible for the emergence of exotic functionalities, such as magnetic order for cyanide-bridged bimetallic coordination networks. Despite its broad interest and intensive developments in chemistry and material sciences, the atomic-scale description of the initial photoinduced process, which couples intermetallic charge-transfer and spin transition, has been debated for decades; it has been beyond reach due to its extreme speed. Here we study this process in a prototype cyanide-bridged CoFe system by femtosecond X-ray and optical absorption spectroscopies, enabling the disentanglement of ultrafast electr…
Competing Phases Involving Spin-State and Ligand Structural Orderings in a Multistable Two-Dimensional Spin Crossover Coordination Polymer
2017
[EN] Competition between spin-crossover and structural ligand ordering is identified as responsible for multistability and generation of six different phases in a rigid two-dimensional coordination polymer formulated {Fe-II[Hg-II(SCN)(3)](2) mu-(4,4'-bipy)(2)}(n) (1) (4,4'-bipy = 4,4'-bipyridine). The structure of 1 consists of infinite linear [Fe(mu-4,4'-bipy)](n)(2n+) chains linked by in situ formed {[Hg-II(SCN)(3)](2)(mu-4,4'-bipy)}(2n-) anionic dimers. The thermal dependence of the high-spin fraction, his, features four magnetic phases defined by steps following the sequence gamma(HS) = 1 (phase 1) gamma(HS) = 1/2 (phase 2) gamma(HS) approximate to 1/3 (phase 3) gamma(HS) = 0 (phase 4) …
CCDC 2016312: Experimental Crystal Structure Determination
2020
Related Article: Lucía Piñeiro-López, Francisco-Javier Valverde-Muñoz, Elzbieta Trzop, M. Carmen Muñoz, Maksym Seredyuk, Javier Castells-Gil, Iván da Silva, Carlos Martí-Gastaldo, Eric Collet, José Antonio Real|2021|Chemical Science|12|1317|doi:10.1039/D0SC04420B
CCDC 1457784: Experimental Crystal Structure Determination
2017
Related Article: Daopeng Zhang, Elzbieta Trzop, Francisco J. Valverde-Muñoz, Lucía Piñeiro-López, M. Carmen Muñoz, Eric Collet, José A. Real|2017|Cryst.Growth Des.|17|2736|doi:10.1021/acs.cgd.7b00218
CCDC 2010363: Experimental Crystal Structure Determination
2020
Related Article: Lucía Piñeiro-López, Francisco-Javier Valverde-Muñoz, Elzbieta Trzop, M. Carmen Muñoz, Maksym Seredyuk, Javier Castells-Gil, Iván da Silva, Carlos Martí-Gastaldo, Eric Collet, José Antonio Real|2021|Chemical Science|12|1317|doi:10.1039/D0SC04420B
CCDC 1457782: Experimental Crystal Structure Determination
2016
Related Article: Daopeng Zhang, Elzbieta Trzop, Francisco J. Valverde-Muñoz, Lucía Piñeiro-López, M. Carmen Muñoz, Eric Collet, José A. Real|2017|Cryst.Growth Des.|17|2736|doi:10.1021/acs.cgd.7b00218
CCDC 1457780: Experimental Crystal Structure Determination
2017
Related Article: Daopeng Zhang, Elzbieta Trzop, Francisco J. Valverde-Muñoz, Lucía Piñeiro-López, M. Carmen Muñoz, Eric Collet, José A. Real|2017|Cryst.Growth Des.|17|2736|doi:10.1021/acs.cgd.7b00218
CCDC 1970081: Experimental Crystal Structure Determination
2020
Related Article: Céline Mariette, Elzbieta Trzop, Jean-Yves Mevellec, Abdou Boucekkine, Aziz Ghoufi, Guillaume Maurin, Eric Collet, M. Carmen Muñoz, José Antonio Real, Bertrand Toudic|2020|Physical Review B: covering condensed matter and materials physics|101|134103|doi:10.1103/PhysRevB.101.134103
CCDC 2010365: Experimental Crystal Structure Determination
2020
Related Article: Lucía Piñeiro-López, Francisco-Javier Valverde-Muñoz, Elzbieta Trzop, M. Carmen Muñoz, Maksym Seredyuk, Javier Castells-Gil, Iván da Silva, Carlos Martí-Gastaldo, Eric Collet, José Antonio Real|2021|Chemical Science|12|1317|doi:10.1039/D0SC04420B
CCDC 1457779: Experimental Crystal Structure Determination
2017
Related Article: Daopeng Zhang, Elzbieta Trzop, Francisco J. Valverde-Muñoz, Lucía Piñeiro-López, M. Carmen Muñoz, Eric Collet, José A. Real|2017|Cryst.Growth Des.|17|2736|doi:10.1021/acs.cgd.7b00218
CCDC 2010361: Experimental Crystal Structure Determination
2020
Related Article: Lucía Piñeiro-López, Francisco-Javier Valverde-Muñoz, Elzbieta Trzop, M. Carmen Muñoz, Maksym Seredyuk, Javier Castells-Gil, Iván da Silva, Carlos Martí-Gastaldo, Eric Collet, José Antonio Real|2021|Chemical Science|12|1317|doi:10.1039/D0SC04420B
CCDC 2010360: Experimental Crystal Structure Determination
2020
Related Article: Lucía Piñeiro-López, Francisco-Javier Valverde-Muñoz, Elzbieta Trzop, M. Carmen Muñoz, Maksym Seredyuk, Javier Castells-Gil, Iván da Silva, Carlos Martí-Gastaldo, Eric Collet, José Antonio Real|2021|Chemical Science|12|1317|doi:10.1039/D0SC04420B
CCDC 1970080: Experimental Crystal Structure Determination
2020
Related Article: Céline Mariette, Elzbieta Trzop, Jean-Yves Mevellec, Abdou Boucekkine, Aziz Ghoufi, Guillaume Maurin, Eric Collet, M. Carmen Muñoz, José Antonio Real, Bertrand Toudic|2020|Physical Review B: covering condensed matter and materials physics|101|134103|doi:10.1103/PhysRevB.101.134103
CCDC 2010362: Experimental Crystal Structure Determination
2020
Related Article: Lucía Piñeiro-López, Francisco-Javier Valverde-Muñoz, Elzbieta Trzop, M. Carmen Muñoz, Maksym Seredyuk, Javier Castells-Gil, Iván da Silva, Carlos Martí-Gastaldo, Eric Collet, José Antonio Real|2021|Chemical Science|12|1317|doi:10.1039/D0SC04420B
CCDC 2010366: Experimental Crystal Structure Determination
2020
Related Article: Lucía Piñeiro-López, Francisco-Javier Valverde-Muñoz, Elzbieta Trzop, M. Carmen Muñoz, Maksym Seredyuk, Javier Castells-Gil, Iván da Silva, Carlos Martí-Gastaldo, Eric Collet, José Antonio Real|2021|Chemical Science|12|1317|doi:10.1039/D0SC04420B
CCDC 1970083: Experimental Crystal Structure Determination
2020
Related Article: Céline Mariette, Elzbieta Trzop, Jean-Yves Mevellec, Abdou Boucekkine, Aziz Ghoufi, Guillaume Maurin, Eric Collet, M. Carmen Muñoz, José Antonio Real, Bertrand Toudic|2020|Physical Review B: covering condensed matter and materials physics|101|134103|doi:10.1103/PhysRevB.101.134103
CCDC 1457783: Experimental Crystal Structure Determination
2016
Related Article: Daopeng Zhang, Elzbieta Trzop, Francisco J. Valverde-Muñoz, Lucía Piñeiro-López, M. Carmen Muñoz, Eric Collet, José A. Real|2017|Cryst.Growth Des.|17|2736|doi:10.1021/acs.cgd.7b00218
CCDC 1970082: Experimental Crystal Structure Determination
2020
Related Article: Céline Mariette, Elzbieta Trzop, Jean-Yves Mevellec, Abdou Boucekkine, Aziz Ghoufi, Guillaume Maurin, Eric Collet, M. Carmen Muñoz, José Antonio Real, Bertrand Toudic|2020|Physical Review B: covering condensed matter and materials physics|101|134103|doi:10.1103/PhysRevB.101.134103
CCDC 2010364: Experimental Crystal Structure Determination
2020
Related Article: Lucía Piñeiro-López, Francisco-Javier Valverde-Muñoz, Elzbieta Trzop, M. Carmen Muñoz, Maksym Seredyuk, Javier Castells-Gil, Iván da Silva, Carlos Martí-Gastaldo, Eric Collet, José Antonio Real|2021|Chemical Science|12|1317|doi:10.1039/D0SC04420B
CCDC 1457781: Experimental Crystal Structure Determination
2016
Related Article: Daopeng Zhang, Elzbieta Trzop, Francisco J. Valverde-Muñoz, Lucía Piñeiro-López, M. Carmen Muñoz, Eric Collet, José A. Real|2017|Cryst.Growth Des.|17|2736|doi:10.1021/acs.cgd.7b00218