Exploiting Pressure To Induce a “Guest-Blocked” Spin Transition in a Framework Material
作者:Natasha F. Sciortino、Florence Ragon、Katrina A. Zenere、Peter D. Southon、Gregory J. Halder、Karena W. Chapman、Lucía Piñeiro-López、José A. Real、Cameron J. Kepert、Suzanne M. Neville
DOI:10.1021/acs.inorgchem.6b01686
日期:2016.10.17
Hofmann-type materials of the type [FeIIPd(CN)4(R-1,2,4-trz)2]·nH2O (R-1,2,4-trz = a 4-functionalized 1,2,4-triazole ligand). A variety of structural and magnetic investigations on the resultant framework material [FeIIPd(CN)4(thiome)2]·2H2O (A·2H2O) reveal that a high-spin (HS) to low-spin (LS) transition is inhibited in A·2H2O due to a combination of guest and ligand steric bulk effects. The water molecules
制备了一种新的官能化的1,2,4-三唑配体4-[((E)-2-(5-甲基-2-噻吩基)乙烯基] -1,2,4-三唑(硫醇),以评估在[Fe II Pd(CN)4(R-1,2,4-trz)2 ]· n H 2 O(R-1,2 )类型的二维霍夫曼型材料中策略性地产生多步自旋跃迁的适用性,4-trz = 4-官能化的1,2,4-三唑配体)。对所得骨架材料[Fe II Pd(CN)4(硫代)2 ]·2H 2 O(A·2H 2 O)表明,由于客体和配体的空间体积效应的组合,在A·2H 2 O中抑制了高自旋(HS)到低自旋(LS)的转变。水分子可以保留多孔主体骨架而被可逆地去除,并由于去除了客体内部压力而导致突然而滞后的一步自旋转变的出现。此外,可变压力结构和磁性研究证明,在静水压力下,A·2H 2 O(0–0.68 GPa)会引发自旋转变,在环境温度为0.68 GPa的情况下会导致两步自旋转变。在A·2H