EAPSI:Towards Combining Magnetic Switching with Conductivity in Molecular Materials

EAPSI：将磁开关与分子材料的电导率相结合

• 批准号: 1515399
• 负责人: Jeremy Hrudka
• 金额: $ 0.51万
• 依托单位: Hrudka Jeremy J
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-06-01 至 2016-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1515399&HistoricalAwards=false
• 关键词: EAPSI; Towards; Combining; Magnetic; Switching

This EAPSI project aims to synthesize novel, dual-purpose molecular materials by combining molecules of different functionalities in the same structure. Specifically, certain iron complexes which exhibit magnetic switching upon changes in temperature, pressure, or light irradiation will be chemically linked to molecular fragments known to conduct electricity. The structure-property relationship will be investigated by crystal structure analysis and magnetic measurements to reveal factors that affect the behavior of such bi-functional materials. Insights from this study will lead to a greater understanding of molecular materials that may be used in such modern technologies as high-density data storage, optical switches, and molecular sensors. The project will be carried out in collaboration with Dr. Sally Brooker and her colleagues at the University of Otago in Dunedin, New Zealand. The host lab?s expertise in this niche field will result in a productive and informative international collaboration that will benefit both New Zealand and US research groups. Spin crossover (SCO) in transition metal compounds is one of the most fascinating phenomena of magnetic bistability in molecules. While the most popular SCO complexes are those of the FeII ion in an environment of six nitrogen atoms, the present project will explore the SCO in an unusual N4S2 coordination environment. Coordination of a common redox-active organic molecule, tetrathiafulvalene (TTF), to the FeII ion through a N2S2 coordinating pocket will allow for combining SCO and conductivity in the same material. The eventual goal of such material design is to attain synergy between the spin-state switching at the FeII center and the conductivity of the organic substructure provided by the TTF units. Thorough characterization of the synthesized materials will be completed on-site using a combination of instrumental methods to investigate magnetic, structural, electrochemical, spectroscopic, and thermodynamic properties of the materials obtained. This award is funded in collaboration with the Royal Society of New Zealand.

该EAPSI项目旨在通过将不同功能的分子组合在同一结构中来合成新型的两用分子材料。具体地说，某些铁络合物在温度、压力或光照变化时表现出磁性开关，它将与已知的导电分子片段化学连接。将通过晶体结构分析和磁性测量来研究结构与性能的关系，以揭示影响此类双功能材料行为的因素。这项研究的洞察力将使人们更好地理解分子材料，这些材料可能用于高密度数据存储、光开关和分子传感器等现代技术。该项目将与新西兰达尼丁的奥塔哥大学的萨利·布鲁克博士和她的同事合作进行。主办实验室？S在这一利基领域的专业知识将导致富有成效和信息丰富的国际合作，这将使新西兰和美国的研究小组受益。过渡金属化合物中的自旋交叉(SCO)是分子中最引人注目的磁性双稳现象之一。虽然最受欢迎的上海合作组织络合物是六个氮原子环境中的FeII离子的络合物，但本项目将在一个不寻常的N4S2配位环境中探索上海合作组织。通过N2S2配位口袋将常见的氧化还原活性有机分子四硫富瓦烯(TTF)与FeII离子配位，将允许在同一材料中结合SCO和导电性。这种材料设计的最终目标是在FeII中心的自旋态转换和TTF单元提供的有机亚结构的导电性之间实现协同。合成材料的彻底表征将在现场完成，使用组合的仪器方法来研究所获得材料的磁性、结构、电化学、光谱和热力学性质。该奖项是与新西兰皇家学会合作资助的。