title: Lattice water molecules tuned spin-crossover for an iron(II) complex with thermal hysteresis.
abstract: A new iron(II) complex based on the 4,4'-dimethyl-2,2'-bipyridine ligand [Fe(4,4'-dmbpy)3(ClO4)(SCN)·3H2O (1·3H2O)] has been prepared and characterized. Structural studies and Hirshfeld surface analysis for complex 1·3H2O at three different temperatures (300, 240 and 130 K) are described. The UV-vis absorption spectrum of a water-free sample (1) in methanol solution and magnetic susceptibility measurements for solid-state samples 1·3H2O and 1 revealed that the removal of lattice water molecules from complex 1·3H2O changed the magnetic properties from the low-spin state (1·3H2O) to the complete spin-crossover (1) between 350-220 K with a thermal hysteresis of 7 K, and was accompanied by a colour change from brown to red.
authors.affiliation: School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 210096, P. R. China. chmsunbw@seu.edu.cn.
authors.forename: Yang-Hui
authors.initials: YH
authors.lastname: Luo
authors.forename: Li-Jing
authors.initials: LJ
authors.lastname: Yang
authors.forename: Qing-Ling
authors.initials: QL
authors.lastname: Liu
authors.forename: Yang
authors.initials: Y
authors.lastname: Ling
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Bai-Wang
authors.initials: BW
authors.lastname: Sun