Journal Article10.1007/S10847-015-0521-Z
Direct observation of low-temperature bistability in an iron(III) LIESST compound
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TL;DR: In this paper, the existence of the interaction between molecules by π electrons is suggested from single crystal structure, and an anomalous LS→HS conversion, aberrant increase of HS molar fraction, was observed at low-temperature (50 K) in 1 after rapid cooling, and interpreted in terms of bistability resulted from strong cooperative interactions.
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Abstract: Iron(III) Schiff base compound [Fe(pap)2]ClO4·H2O (1, and Hpap = (2-(2-pyridylmethyleneamino)phenol)) shows abrupt spin crossover (SCO) with a hysteresis (T1/2↓ = 165 K, T1/2↑ = 180 K) and anomalous light induced excited spin state trapping In the complex 1, the existence of the interaction between molecules by π electrons is suggested from single crystal structure An anomalous LS → HS conversion, aberrant increase of HS molar fraction, was observed at low-temperature (50 K) in 1 after rapid cooling, and interpreted in terms of bistability resulted from strong cooperative interactions
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Citations
A critical review of the T(LIESST) temperature in spin crossover materials − What it is and what it is not
Guillaume Chastanet,Cédric Desplanches,Chérif Baldé,Patrick Rosa,Mathieu Marchivie,Philippe Guionneau +5 more
- 17 Jul 2018
TL;DR: In this article, a fast and easy way to record the limit temperature above which the photo-induced state is erased, denoted T(LIESST), was introduced, which has been widely used in the spin crossover community due to its easiness and its efficiency.
References
Spin-Transition Polymers: From Molecular Materials Toward Memory Devices
O. Kahn,C. Jay Martinez +1 more
TL;DR: In this article, the transition temperature of transition metal compounds can be fine tuned using an approach based on the concept of a molecular alloy, and it is possible to design a compound for which room temperature falls in the middle of the thermal hysteresis loop.
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Photoswitchable coordination compounds
TL;DR: In this article, the basic photophysical phenomena together with representative examples such as nitroprusside derivatives, relevant spin crossover complexes, stilbenoid complexes and finally Prussian blue analogues are discussed.
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Dynamical model for spin-crossover solids. II. Static and dynamic effects of light in the mean-field approach
TL;DR: In this paper, a photoexcitation contribution in the dynamical model was introduced as an additional term in the rate transition, in order to reproduce the light induced thermal hysteresis effect, experimentally observed in the spin-crossover materials.
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