Magnetic Exchange via Borane Anions (3c-2e bonds)

本项目的目标是开发和使用新的合成方法来制备具有磁性的分子多自旋体系。我们打算使用顺磁性、生物八面体金属络合物和共轭多羧酸配体来构建具有高自旋基态的多核络合物。组装体的成核性将由羧酸盐官能团的数量控制。磁性交换作用的类型和大小将由有机间隔物分子的扩展共轭pi-体系来调节。我们计划建立一系列不同的同金属和异双金属物种(一个图书馆)。这将使我们能够确定聚集体的组成和自旋基态。用循环伏安法、红外光谱、紫外可见光谱、X射线结晶学、磁化率测量和高场EPR光谱对配合物的化学和物理性质进行了表征。

The objective of this project is to develop and use, novel synthetic methods to prepare molecular multispin systems with magnetic properties. We intend to use paramagnetic, bioctahedral metal complexes and conjugated polycarboxylate coligands to construct polynuclear complexes with high-spin ground states. The nuclearity of the assemblies will be controlled by the number of the carboxylate functions. The type and magnitude of the magnetic exchange interactions will be adjusted by the extended conjugated pi-system of the organic spacer molecule. We plan to build a range of various homo- and heterobimetallic species (a library). This will allow us to determine the composition and the spin ground state of the aggregates. The chemical and physical properties of the complexes will be characterized by cyclic voltammetry, IR spectroscopy, UV/Vis spectroscopy, X-ray crystallography, magnetic susceptibility measurements and high-field EPR spectroscopy.