Please use this identifier to cite or link to this item: https://doi.org/10.1021/acs.inorgchem.2c00192
Title: [Au-I(CN)(2)]-Armed [Fe(III)2Fe(II)2] Square Complex Showing Unusual Spin-Crossover Behavior Due to a Symmetry-Breaking Phase Transition
Authors: You, Maolin
Shao, Dong
Deng, Yi-Fei
Yang, Jiong
Yao, Nian-Tao
Meng, Yin-Shan
Ungur, Liviu 
Zhang, Yuan-Zhu
Keywords: Science & Technology
Physical Sciences
Chemistry, Inorganic & Nuclear
Chemistry
ELECTRON-TRANSFER
TEMPERATURE
BISTABILITY
Issue Date: 18-Apr-2022
Publisher: AMER CHEMICAL SOC
Citation: You, Maolin, Shao, Dong, Deng, Yi-Fei, Yang, Jiong, Yao, Nian-Tao, Meng, Yin-Shan, Ungur, Liviu, Zhang, Yuan-Zhu (2022-04-18). [Au-I(CN)(2)]-Armed [Fe(III)2Fe(II)2] Square Complex Showing Unusual Spin-Crossover Behavior Due to a Symmetry-Breaking Phase Transition. INORGANIC CHEMISTRY 61 (15) : 5855-5860. ScholarBank@NUS Repository. https://doi.org/10.1021/acs.inorgchem.2c00192
Abstract: The incorporation of two different cyanide building blocks of [(TpR)FeIII(CN)3]- and [AuI(CN)2]- into one molecule afforded a novel hexanuclear [FeIII2FeII2AuI2] complex (1·2Et2O), in which the cyanide-bridged [FeIII2FeII2] square was further grafted by two [AuI(CN)2]- fragments as long arms in syn orientations. Complex 1·2Et2O undergoes a gradual spin crossover (SCO) ffrom low-spin (LS) to high-spin (HS) state for the Fe(II) centers upon desolvation. Remarkably, its desolvated phase (1) exhibits a reversible but atypical two-step (sharp-gradual) SCO behavior with considerable hysteresis (21 K). Variable-temperature single-crystal X-ray structural studies reveal that the hysteretic spin transition takes place synchronously with the concerted displacive motions of the molecules, representing another rare example including multistep and hysteretic spin transitions due to the synergetic SCO and structural phase transition.
Source Title: INORGANIC CHEMISTRY
URI: https://scholarbank.nus.edu.sg/handle/10635/228917
ISSN: 00201669
1520510X
DOI: 10.1021/acs.inorgchem.2c00192
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