High-temperature photo-induced switching and pressure-induced transition in a cooperative molecular spin-crossover material

Gavin A. Craig; Jose Sánchez Costa; Olivier Roubeau; Simon J. Teat; Helena J. Shepherd; Manuel Lopes; Gábor Molnár; Azzedine Bousseksou; Guillem Aromí

doi:10.1039/C3DT52075G

High-temperature photo-induced switching and pressure-induced transition in a cooperative molecular spin-crossover material

Gavin A. Craig, Jose Sánchez Costa, Olivier Roubeau, Simon J. Teat, Helena J. Shepherd, Manuel Lopes, Gábor Molnár, Azzedine Bousseksou, Guillem Aromí

Pure And Applied Chemistry

Research output: Contribution to journal › Article

31 Citations (Scopus)

Abstract

The thermal and photo-induced switching properties of the recently published molecular spin crossover complex [Fe(H4L)2](ClO4)2·H2O·2(CH3)2CO (1) have been investigated in detail through Raman spectroscopy. Magnetometric and single crystal X-ray diffraction kinetic studies within the hysteresis loop have proven its metastable character, which allowed establishing the shape of the true, quasi-static hysteresis loop. This is related to the proximity of the temperatures of the thermal high to low spin SCO (T1/2↓) to those of the relaxation of the thermally or photo-generated metastable states (T(TIESST) and T(LIESST), respectively). Green light irradiation within the hysteresis loop results in a complete low to high spin photo-switch. In addition, the SCO of 1 at room temperature can be induced by applying pressure, as followed by Raman spectroscopy.

Original language	English
Pages (from-to)	729-737
Number of pages	9
Journal	Dalton Transactions
Volume	43
Issue number	2
DOIs	https://doi.org/10.1039/C3DT52075G
Publication status	Published - 3 Oct 2013

Keywords

photo-induced switching
pressure-induced transition
molecular spin crossover complex

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10.1039/C3DT52075G

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title = "High-temperature photo-induced switching and pressure-induced transition in a cooperative molecular spin-crossover material",

abstract = "The thermal and photo-induced switching properties of the recently published molecular spin crossover complex [Fe(H4L)2](ClO4)2·H2O·2(CH3)2CO (1) have been investigated in detail through Raman spectroscopy. Magnetometric and single crystal X-ray diffraction kinetic studies within the hysteresis loop have proven its metastable character, which allowed establishing the shape of the true, quasi-static hysteresis loop. This is related to the proximity of the temperatures of the thermal high to low spin SCO (T1/2↓) to those of the relaxation of the thermally or photo-generated metastable states (T(TIESST) and T(LIESST), respectively). Green light irradiation within the hysteresis loop results in a complete low to high spin photo-switch. In addition, the SCO of 1 at room temperature can be induced by applying pressure, as followed by Raman spectroscopy.",

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High-temperature photo-induced switching and pressure-induced transition in a cooperative molecular spin-crossover material. / Craig, Gavin A.; Costa, Jose Sánchez; Roubeau, Olivier; Teat, Simon J.; Shepherd, Helena J.; Lopes, Manuel; Molnár, Gábor; Bousseksou, Azzedine; Aromí, Guillem.

In: Dalton Transactions, Vol. 43, No. 2, 03.10.2013, p. 729-737.

Research output: Contribution to journal › Article

TY - JOUR

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AU - Craig, Gavin A.

AU - Costa, Jose Sánchez

AU - Roubeau, Olivier

AU - Teat, Simon J.

AU - Shepherd, Helena J.

AU - Lopes, Manuel

AU - Molnár, Gábor

AU - Bousseksou, Azzedine

AU - Aromí, Guillem

PY - 2013/10/3

Y1 - 2013/10/3

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AB - The thermal and photo-induced switching properties of the recently published molecular spin crossover complex [Fe(H4L)2](ClO4)2·H2O·2(CH3)2CO (1) have been investigated in detail through Raman spectroscopy. Magnetometric and single crystal X-ray diffraction kinetic studies within the hysteresis loop have proven its metastable character, which allowed establishing the shape of the true, quasi-static hysteresis loop. This is related to the proximity of the temperatures of the thermal high to low spin SCO (T1/2↓) to those of the relaxation of the thermally or photo-generated metastable states (T(TIESST) and T(LIESST), respectively). Green light irradiation within the hysteresis loop results in a complete low to high spin photo-switch. In addition, the SCO of 1 at room temperature can be induced by applying pressure, as followed by Raman spectroscopy.

KW - photo-induced switching

KW - pressure-induced transition

KW - molecular spin crossover complex

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SN - 1477-9226

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