Cooperativity in Organic Spin Materials and their Hybrid Systems: Steering of Magnetic Properties by Orientation of Radicals (B11)

有机自旋材料及其混合系统的协同性：通过自由基的方向控制磁性（B11）

• 批准号: 159705466
• 金额: --
• 依托单位: Institut für Physikalische Chemie
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/159705466?language=en
• 关键词: Cooperativity; Organic; Spin; Materials; their

The project aims at designing, preparing, and characterizing novel purely organic spin systems, with the objective of realizing and maximizing ferromagnetic exchange couplings. While cooperative magnetic systems have been mostly realized by trial-and-error, our approach will be guided by predictive theoretical chemistry. The strength of magnetic exchange couplings will be maximized by optimizing the molecular building blocks, using thioxoverdazyls as well as symmetric and non-symmetric biradical systems and their mutual orientations. Further approaches will include the assembly of building blocks within porous inorganic host materials, the topochemical polymerization of verdazyl substituted polydiacetylenes and the design of polyverdazyl systems. Cooperative magnetism will be examined by temperature dependent magnetic susceptibility and field dependent magnetization measurements. Modern solid-state NMR and EPR experiments will be used to characterize these materials structurally and to investigate the strengths of intermolecular magnetic exchange interactions.

该项目旨在设计，制备和表征新型纯有机自旋系统，目的是实现和最大化铁磁交换耦合。虽然合作磁性系统主要是通过试错法实现的，但我们的方法将以预测理论化学为指导。磁交换耦合的强度将通过优化分子结构单元，使用thioxoverdazyls以及对称和非对称的双自由基系统和它们的相互取向来最大化。进一步的方法将包括在多孔无机主体材料内组装结构单元、Verdazyl取代的聚二乙炔的拓扑化学聚合和聚Verdazyl系统的设计。合作磁性将通过温度相关的磁化率和场相关的磁化测量来检查。现代固态NMR和EPR实验将用于表征这些材料的结构，并研究分子间磁交换相互作用的强度。