AustralieFrV1, Main, Exploration, bibRecord, 004929

Thermal‐, Pressure‐ and Light‐Induced Spin‐Crossover Behaviour in the Two‐Dimensional Hofmann‐Like Coordination Polymer [Fe(3‐Clpy)2Pd(CN)4]

Identifieur interne : 004929 ( Main/Exploration ); précédent : 004928; suivant : 004930

Thermal‐, Pressure‐ and Light‐Induced Spin‐Crossover Behaviour in the Two‐Dimensional Hofmann‐Like Coordination Polymer [Fe(3‐Clpy)2Pd(CN)4]

Auteurs : Víctor Martínez ; Zulema Arcís Castillo ; M. Carmen Mu Oz [Espagne] ; Ana B. Gaspar ; C. Etrillard [France] ; Jean-François Létard [France] ; Sergey A. Terekhov [Ukraine] ; Gennadiy V. Bukin [Ukraine] ; Georgiy Levchenko [Ukraine] ; José A. Real [Espagne]

Source :

European Journal of Inorganic Chemistry [ 1434-1948 ] ; 2013-02-18.

RBID : ISTEX:0010BE6AD863BE1BF8997230377DA8DA75D84DB5

English descriptors

Abstract

The thermal spin‐crossover behaviour, photoexcitation and subsequent relaxation, as well as the pressure‐induced spin‐crossover behaviour at 298 K are discussed for the non‐porous two‐dimensional Hofmann‐like coordination polymer [Fe(3‐Clpy)2Pd(CN)4] (1). The title compound undergoes a two‐step, cooperative thermal‐induced SCO with critical temperatures Tc1↓ = 159.6 K and Tc1↑ = 164.5 K for the first step and Tc2↓ = 141.4 K and Tc2↑ = 148.4 K for the second step. Irradiation of the low‐spin state with green light (514 nm) at 10 K induced the photoexcitation of around 60 % of the iron(II) centres to the high‐spin state (LIESST effect). The subsequent cooperative relaxation processes were recorded at several temperatures and analysed. The effect of cooperativity on the photoexcitation was investigated by the LITH (light‐induced thermal hysteresis) procedure. At 300 K, the coordination polymer 1 underwent a cooperative spin‐crossover transition at around 0.6 GPa. The thermodynamic analysis of the pressure‐induced SCO transition afforded the enthalpy and cooperativity parameters ΔHHL(p) = 22.01 kJ mol–1 and Γ(p) = 7.47 kJ mol–1, consistent with previous results.

Url:

https://api.istex.fr/document/0010BE6AD863BE1BF8997230377DA8DA75D84DB5/fulltext/pdf

DOI: 10.1002/ejic.201201097

Affiliations:

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Le document en format XML

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<term>Behaviour</term>
<term>Chem</term>
<term>Comments inorg</term>
<term>Consecutive layers</term>
<term>Constant irradiation</term>
<term>Cooperativity</term>
<term>Coord</term>
<term>Coordination polymer</term>
<term>Critical temperatures</term>
<term>Dalton trans</term>
<term>Distinct sites</term>
<term>Full paper</term>
<term>Green light</term>
<term>Hysteresis</term>
<term>Hysteresis width</term>
<term>Hysteretic behaviour</term>
<term>Inorg</term>
<term>Liesst effect</term>
<term>Light irradiation</term>
<term>Lith</term>
<term>Magnetic response</term>
<term>Microcrystalline samples</term>
<term>Molar fraction</term>
<term>Monoclinic species</term>
<term>Optical spectra</term>
<term>Photostationary limit</term>
<term>Photostationary point</term>
<term>Pressure dependence</term>
<term>Pressure increases</term>
<term>Pressure mode</term>
<term>Real lith loop</term>
<term>Relaxation curves</term>
<term>Room temperature</term>
<term>Sigmoidal</term>
<term>Solid lines</term>
<term>Spanish ministerio</term>
<term>Squid magnetometer</term>
<term>Temperature range</term>
<term>Thermal behaviour</term>
<term>Thermal hysteresis</term>
<term>Time dependence</term>
<term>Title compound</term>
<term>Verlag gmbh</term>
<term>Visible absorption spectroscopy</term>
<term>Warming mode</term>
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<term>Behaviour</term>
<term>Chem</term>
<term>Comments inorg</term>
<term>Consecutive layers</term>
<term>Constant irradiation</term>
<term>Cooperativity</term>
<term>Coord</term>
<term>Coordination polymer</term>
<term>Critical temperatures</term>
<term>Dalton trans</term>
<term>Distinct sites</term>
<term>Full paper</term>
<term>Green light</term>
<term>Hysteresis</term>
<term>Hysteresis width</term>
<term>Hysteretic behaviour</term>
<term>Inorg</term>
<term>Liesst effect</term>
<term>Light irradiation</term>
<term>Lith</term>
<term>Magnetic response</term>
<term>Microcrystalline samples</term>
<term>Molar fraction</term>
<term>Monoclinic species</term>
<term>Optical spectra</term>
<term>Photostationary limit</term>
<term>Photostationary point</term>
<term>Pressure dependence</term>
<term>Pressure increases</term>
<term>Pressure mode</term>
<term>Real lith loop</term>
<term>Relaxation curves</term>
<term>Room temperature</term>
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<term>Solid lines</term>
<term>Spanish ministerio</term>
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<term>Thermal behaviour</term>
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<front><div type="abstract">The thermal spin‐crossover behaviour, photoexcitation and subsequent relaxation, as well as the pressure‐induced spin‐crossover behaviour at 298 K are discussed for the non‐porous two‐dimensional Hofmann‐like coordination polymer [Fe(3‐Clpy)2Pd(CN)4] (1). The title compound undergoes a two‐step, cooperative thermal‐induced SCO with critical temperatures Tc1↓ = 159.6 K and Tc1↑ = 164.5 K for the first step and Tc2↓ = 141.4 K and Tc2↑ = 148.4 K for the second step. Irradiation of the low‐spin state with green light (514 nm) at 10 K induced the photoexcitation of around 60 % of the iron(II) centres to the high‐spin state (LIESST effect). The subsequent cooperative relaxation processes were recorded at several temperatures and analysed. The effect of cooperativity on the photoexcitation was investigated by the LITH (light‐induced thermal hysteresis) procedure. At 300 K, the coordination polymer 1 underwent a cooperative spin‐crossover transition at around 0.6 GPa. The thermodynamic analysis of the pressure‐induced SCO transition afforded the enthalpy and cooperativity parameters ΔHHL(p) = 22.01 kJ mol–1 and Γ(p) = 7.47 kJ mol–1, consistent with previous results.</div>
</front>
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Thermal‐, Pressure‐ and Light‐Induced Spin‐Crossover Behaviour in the Two‐Dimensional Hofmann‐Like Coordination Polymer [Fe(3‐Clpy)2Pd(CN)4]

Thermal‐, Pressure‐ and Light‐Induced Spin‐Crossover Behaviour in the Two‐Dimensional Hofmann‐Like Coordination Polymer [Fe(3‐Clpy)2Pd(CN)4]

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri