Spin crossover in oligonuclear iron(II) helicates (C06)

我们将设计铁（II）配合物，其自旋状态可以通过自旋交叉以一种明确而微妙的方式进行操纵：a)通过微调配体链上取代基的电子和空间因子来调节配体场分裂能量；b)探索立体化学定义的寡核铁（II）配合物的磁手性效应；c)将合适的分子客体包封到超分子荚膜铁（II）配合物中。d)在不同配位球中制备金属离子的寡核配合物；e)在配体链骨架中引入发色体，研究光诱导激发自旋态捕获（LIESST）效应。

We will design iron(II) complexes whose spin state can be manipulated in a defined and subtle manner in terms of a spin-crossover by a) adjusting the ligand field splitting energy through fine-tuning of the electronic and steric factors of substituents on the ligand strands, b) exploring magnetochiral effects of stereochemically defined oligonuclear iron(II) complexes, c) encapsulation of suitable molecular guest into supramolecular capsular iron(II) complexes, d) preparing oligonuclear complexes with metal ions in different coordination spheres, and e) introducing chromophors in the ligand strands¿ back-bones to study light induced excited spin state trapping (LIESST) effects.