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Updated: Aug 6, 2026

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
Multistep Changes in Spin-Crossover Temperature Induced by Stepwise Desolvations
Taisei Suzuki1, Takuya Shiga1, Natsumi Okawa1
1Degree Programs in Pure and Applied Sciences, Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan.
Abstract:
Lattice solvents significantly influence spin-crossover (SCO) behavior, while multistep changes induced by stepwise desolvations are rarely reported. Herein, we report a novel Fe(II) SCO complex, [Fe(H2L)2](BF4)2·3VN (1·3VN, H2L = 2,6-bis(5-phenyl-1H-pyrazol-3-yl)pyridine, VN = valeronitrile), shows non-monotonic changes in spin transition temperature (T1/2) upon stepwise desolvation of VN molecules. A conversion from 1·3VN to 1·2VN increases T1/2 and slightly enhances hysteresis. In contrast, further desolvated 1·VN shows partial SCO with significantly decreased T1/2 and enhanced hysteresis. Structural investigations revealed that the multistep changes in T1/2 values can be explained by significant alterations of the intermolecular interactions between VN molecules and 1.
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