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2012•European Journal of Inorganic ChemistryRequires access

When Stable and Metastable HS States Meet in Spin‐Crossover Compounds

Nicolas Paradis, Guillaume Chastanet, Jean‐François Létard

Open publisher page 65 citations

Abstract

Abstract With the ultimate goal of rationally inducing overlap between the stable high spin state (HSSS) and the metastable high spin state (HSMS) generated by a rapid frozen effect, a series of [FexMn1–x(bpp)2](BF4)2 [bpp = 2,6‐bis(pyrazol‐3‐yl)pyridine] complexes was prepared. For all the materials, the thermal spin crossover (SCO) properties were measured and the stability of the metastable HSMS state was probed through the determination of the T(TIESST) value associated with the Thermally‐Induced Excited Spin‐State Trapping effect. The overlap between the two systems was observed for x ≤ 0.90 and the consequences on the shape and the completeness of the SCO behavior were discussed.

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What this paper is about

Abstract With the ultimate goal of rationally inducing overlap between the stable high spin state (HSSS) and the metastable high spin state (HSMS) generated by a rapid frozen effect, a series of [FexMn1–x(bpp)2](BF4)2 [bpp = 2,6‐bis(pyrazol‐3‐yl)pyridine] complexes was prepared. For all the materials, the thermal spin crossover (SCO) properties were measured and the stability of the metastable HSMS state was probed through the determination of the T(TIESST) value associated with the Thermally‐Induced Excited Spin‐State Trapping effect. The overlap between the two systems was observed for x ≤ 0.90 and the consequences on the shape and the completeness of the SCO behavior were discussed.

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Available abstract

Abstract With the ultimate goal of rationally inducing overlap between the stable high spin state (HSSS) and the metastable high spin state (HSMS) generated by a rapid frozen effect, a series of [FexMn1–x(bpp)2](BF4)2 [bpp = 2,6‐bis(pyrazol‐3‐yl)pyridine] complexes was prepared. For all the materials, the thermal spin crossover (SCO) properties were measured and the stability of the metastable HSMS state was probed through the determination of the T(TIESST) value associated with the Thermally‐Induced Excited Spin‐State Trapping effect. The overlap between the two systems was observed for x ≤ 0.90 and the consequences on the shape and the completeness of the SCO behavior were discussed.

Key concepts: Spin crossover, Metastability, Chemistry, Spin states, Excited state, Spin (aerodynamics), Thermal stability, Pyridine

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