Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C. V. Raman Road, Bangalore 560012, India.
Sorbonne Université, Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, 4 place Jussieu, Paris 750005, France.
Inorg Chem. 2023 Jun 12;62(23):8794-8802. doi: 10.1021/acs.inorgchem.2c03972. Epub 2023 Mar 3.
A mixed-valence Fe(II)Fe(III) molecular system, {[Fe(pzTp)(CN)][Fe(bik)]}·[Fe(pzTp)(CN)]·4MeOH (·4MeOH) (bik = bis-(1-methylimidazolyl)-2-methanone, pzTp = tetrakis(pyrazolyl)borate), exhibits single-crystal-to-single-crystal (SC-SC) transformation while increasing the temperature and is converted into {[Fe(pzTp)(CN)][Fe(bik)]}·[Fe(pzTp)(CN)] (). Both complexes exhibit thermo-induced spin-state switching behavior along with reversible SC-SC transformation, where the low-temperature [FeFe] phase transforms into a high-temperature [FeFe] phase. ·4MeOH exhibits an abrupt spin-state switching with at 355 K, whereas undergoes a gradual and reversible spin-state switching with a lower at 338 K. Astonishingly, exhibits ON/OFF photo-induced spin-state switching with = 67 K, whereas ·4MeOH does not show such an effect.
一种混合价态的 Fe(II)Fe(III) 分子体系，{[Fe(pzTp)(CN)][Fe(bik)]}·[Fe(pzTp)(CN)]·4MeOH (·4MeOH)（bik = 双-(1-甲基咪唑基)-2-酮，pzTp = 四(吡唑基)硼酸），在升温过程中表现出单晶到单晶（SC-SC）转变，并转化为{[Fe(pzTp)(CN)][Fe(bik)]}·Fe(pzTp)(CN)。这两个配合物都表现出热诱导自旋态转变以及可逆的 SC-SC 转变，其中低温 [FeFe] 相转变为高温 [FeFe] 相。·4MeOH 在 355 K 时表现出突然的自旋态转变，而 在 338 K 时则表现出逐渐且可逆的自旋态转变，其转变温度较低。令人惊讶的是， 表现出 ON/OFF 光诱导自旋态转变，转变温度为 67 K，而·4MeOH 则没有这种效应。
