高自旋密度的有机分子及其金属络合物的合成、结构和磁性能研究

Due to the theoretical interests and potential applications, the research on organic magnets has received a lot of attention. This research project is mainly concerned about the design and synthesis of high-spin organic molecules. Through coordination with suitable metal ions, spin-spin interaction can be enhanced. As a result, new organic magnets of high dimensions may be afforded by this approach. Tens of benzene, naphthalene and triphenylamine derivatives featuring nitronyl nitroxides were successfully prepared and characterized. Their crystal structures were determined and magnetic properties were measured with SQUID. Structure-magnetic property correlation was also investigated for these magnetic crystals. Metal complexes such as three- and four-spin molecules were obtained by coordination of these nitronyl nitroxides with metal ions. In combination with theoretical calculation results, the metal-nitronyl nitroxide interactions were investigated in detail. It was found that nitronyl nitroxides could coordinate with silver ions to form 1D and 2D supramolecules. Strong spin-spin coupling of nitronyl nitroxides through silver ions was observed.

有机铁磁体具有很多优良的特性，具有潜在的应用背景。同时，有机铁磁体的研究具有非常重要的科学意义，将有助于人们对磁矩起源和磁相互作用等基本概念的进一步了解和认识，并推动相关学科的发展。本申请项目设计、合成了高自旋密度的有机分子?其金属离子络合物，以增加自旋间相互作用的强度和维数，希望得到新型有机铁磁体。通过晶体结构，结合理论计算，进?步的研究分子结构、晶体结构与磁性能的关系，为进一步的开展有机铁磁体