TY - JOUR
T1 - Switching the magnetic hysteresis of an [Feii–NC–Wv]-based coordination polymer by photoinduced reversible spin crossover
AU - Zhao, Liang
AU - Meng, Yin Shan
AU - Liu, Qiang
AU - Sato, Osamu
AU - Shi, Quan
AU - Oshio, Hiroki
AU - Liu, Tao
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (22025101, 91961114, 21871039, 22071017 and 21801037), the Liaoning Provincial Natural Science Foundation of China (2019-MS-318) and the Fundamental Research Funds for the Central Universities, China.
Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Nature Limited.
PY - 2021/7
Y1 - 2021/7
N2 - Magnetic bistable materials that feature magnetic hysteresis are comparable to elementary binary units and promising for application in switches and memory devices. In this work, we report a material that consists of parallel cyanide-bridged [Feii–Wv] coordination chains linked together through rigid bis(imidazolyl)–benzene ligands and displays multiple magnetic states. The paramagnetic high-spin and diamagnetic low-spin states of the spin-crossover Feii ions can be interconverted by reversible light-induced excited spin state trapping (LIESST) by alternating between light irradiation of 808 and 473 nm. At 1.8 K, under 808-nm-light irradiation, magnetic interactions between the photogenerated paramagnetic high-spin Feii centres and the Wv centres lead to long fragments that exhibit single-chain magnet behaviour, with a wide magnetic hysteresis and a large coercive field of 19 kOe; under a 473 nm light, isolated Feii–Wv fragments behave as single-molecule magnets instead. At 3.3 K, the high-spin form still displays magnetic hysteresis, albeit narrower, whereas the low-spin one does not. [Figure not available: see fulltext.]
AB - Magnetic bistable materials that feature magnetic hysteresis are comparable to elementary binary units and promising for application in switches and memory devices. In this work, we report a material that consists of parallel cyanide-bridged [Feii–Wv] coordination chains linked together through rigid bis(imidazolyl)–benzene ligands and displays multiple magnetic states. The paramagnetic high-spin and diamagnetic low-spin states of the spin-crossover Feii ions can be interconverted by reversible light-induced excited spin state trapping (LIESST) by alternating between light irradiation of 808 and 473 nm. At 1.8 K, under 808-nm-light irradiation, magnetic interactions between the photogenerated paramagnetic high-spin Feii centres and the Wv centres lead to long fragments that exhibit single-chain magnet behaviour, with a wide magnetic hysteresis and a large coercive field of 19 kOe; under a 473 nm light, isolated Feii–Wv fragments behave as single-molecule magnets instead. At 3.3 K, the high-spin form still displays magnetic hysteresis, albeit narrower, whereas the low-spin one does not. [Figure not available: see fulltext.]
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U2 - 10.1038/s41557-021-00695-1
DO - 10.1038/s41557-021-00695-1
M3 - Article
C2 - 34031565
AN - SCOPUS:85106284250
VL - 13
SP - 698
EP - 704
JO - Nature Chemistry
JF - Nature Chemistry
SN - 1755-4330
IS - 7
ER -