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Direct observation of low-temperature bistability in an iron(III) LIESST compound

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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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Acknowledgments

The authors acknowledge Grants-in-Aid from MEXT of Japan (No. 26288026 and 2506 [Science of Atomic Layers]).

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Authors and Affiliations

  1. Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan

    Naoto Saigo, Yusuke Sekimoto, Manabu Nakaya, Ryo Ohtani, Msaaki Nakamura & Shinya Hayami

  2. Institute of Pulsed Power Science (IPPS), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan

    Shinya Hayami

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  1. Naoto Saigo
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  2. Yusuke Sekimoto
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  3. Manabu Nakaya
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  4. Ryo Ohtani
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  5. Msaaki Nakamura
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  6. Shinya Hayami
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Correspondence to Shinya Hayami.

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Saigo, N., Sekimoto, Y., Nakaya, M. et al. Direct observation of low-temperature bistability in an iron(III) LIESST compound. J Incl Phenom Macrocycl Chem 82, 225–228 (2015). https://doi.org/10.1007/s10847-015-0521-z

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  • DOI: https://doi.org/10.1007/s10847-015-0521-z

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