Multistep Changes in Spin‐Crossover Temperature Induced by Stepwise Desolvations
4 affiliations
- 1Degree Programs in Pure and Applied Sciences Graduate School of Science and Technology University of Tsukuba Tsukuba Ibaraki Japan
- 2Photon Factory Institute of Materials Structure Science High Energy Accelerator Research Organization (KEK) Tsukuba Ibaraki Japan
- 3Synchrotron Radiation Research Center Nagoya University Nagoya Aichi Japan
- 4Institute of Coordination Chemistry Leibniz Universität Hannover Hannover Germany
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 (T 1/2) upon stepwise desolvation of VN molecules. A conversion from 1·3VN to 1·2VN increases T 1/2 and slightly enhances hysteresis. In contrast, further desolvated 1·VN shows partial SCO with significantly decreased T 1/2 and enhanced hysteresis. Structural investigations revealed that the multistep changes in T 1/2 values can be explained by significant alterations of the intermolecular interactions between VN molecules and 1.
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BibTeX
@article{suzuki2026multistep,
title = {{Multistep Changes in Spin‐Crossover Temperature Induced by Stepwise Desolvations}},
author = {Taisei Suzuki and Takuya Shiga and Natsumi Okawa and Nozomi Mihara and Daisuke Okuyama and Reiji Kumai and Hajime Sagayama and Maximilian Seydi Kilic and Kevin Tran and Franz Renz and Masayuki Nihei},
journal = {Chemistry (Weinheim an Der Bergstrasse, Germany)},
year = {2026},
month = jul,
doi = {10.1002/chem.71440},
url = {https://doi.org/10.1002/chem.71440},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - Multistep Changes in Spin‐Crossover Temperature Induced by Stepwise Desolvations
AU - Taisei Suzuki
AU - Takuya Shiga
AU - Natsumi Okawa
AU - Nozomi Mihara
AU - Daisuke Okuyama
AU - Reiji Kumai
AU - Hajime Sagayama
AU - Maximilian Seydi Kilic
AU - Kevin Tran
AU - Franz Renz
AU - Masayuki Nihei
PY - 2026
DA - 2026/07/18
JO - Chemistry (Weinheim an Der Bergstrasse, Germany)
DO - 10.1002/chem.71440
UR - https://doi.org/10.1002/chem.71440
AB - 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 (T 1/2) upon stepwise desolvation of VN molecules. A conversion from 1·3VN to 1·2VN increases T 1/2 and slightly enhances hysteresis. In contrast, further desolvated 1·VN shows partial SCO with significantly decreased T 1/2 and enhanced hysteresis. Structural investigations revealed that the multistep changes in T 1/2 values can be explained by significant alterations of the intermolecular interactions between VN molecules and 1.
SN - 0947-6539
SN - 1521-3765
ER -