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|a 10.1002/adma.202507457
|2 doi
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|a pubmed25n1583.xml
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|a (NLM)40556593
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|a DE-627
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|a eng
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|a Li, Guanping
|e verfasserin
|4 aut
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|a Stimuli-Responsive Low-Frequency Terahertz Absorption ON-OFF Switchability in Spin-Crossover Material
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|c 2025
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|a Text
|b txt
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 28.09.2025
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
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|a Thermal and optical-induced ON-OFF switchable materials show vast potential in various fields like sensors, spintronics, and electronic devices, but remain underexplored in the essential terahertz (THz) region. In this context, a unique 1D spin-crossover (SCO) network, {[FeII(4-cyanopyridine)2][HgII(µ-SCN)2(SCN)(4-cyanopyridine)]2}n (1), has been designed. Temperature-dependent crystallographic, magnetic, and THz absorption spectroscopic studies indicate an abrupt SCO phenomenon from a high-spin (HS) state to a complete or partial low-spin (LS) state, depending on the cooling rate. At low temperatures, the LS state can be converted into the metastable HS state via the light-induced excited spin-state trapping (LIESST) effect using visible or near-infrared lights. Both temperature and light reversibly modulate the THz absorbance (e.g., 0.82 and 1.37 THz) associated with phonons around Fe(II) centers, confirmed by first-principles calculations and photocrystallographic analysis. This work advances comprehension of the intersection between structures, THz properties, and external-stimuli switching effects and is pivotal for future THz device applications
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|a Journal Article
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|a ab initio calculation
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|a photomagnetism
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|a spin‐crossover
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|a switchability
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|a terahertz spectroscopy
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|a Stefanczyk, Olaf
|e verfasserin
|4 aut
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|a Kumar, Kunal
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|a Guérin, Laurent
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|a Nakamura, Kazuki
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|a Alashoor, Maryam
|e verfasserin
|4 aut
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|a Xiong, Lulu
|e verfasserin
|4 aut
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|a Nakabayashi, Koji
|e verfasserin
|4 aut
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|a Imoto, Kenta
|e verfasserin
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|a Nakamura, Yuiga
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|a Maity, Sumit Ranjan
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|a Chastanet, Guillaume
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|a Chilton, Nicholas F
|e verfasserin
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|a Ohkoshi, Shin-Ichi
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 37(2025), 38 vom: 02. Sept., Seite e2507457
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
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|g volume:37
|g year:2025
|g number:38
|g day:02
|g month:09
|g pages:e2507457
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|u http://dx.doi.org/10.1002/adma.202507457
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