Towards the Design of Molecular Switches

近年来，人们对自旋交叉化合物的兴趣大大增加，因为这类化合物显示出在热、压和光诱导的两种不同自旋态之间进行转换的可能性，在信号处理和显示设备领域似乎具有巨大的潜力。这个提议的目标有三个主要目标：(I)合成在热、光和压力的影响下具有合适的电子开关性能的新的铁(II)自旋交叉化合物(Ii)详细了解所涉及的电子过程和合作作用的机制(Iii)确定导致长寿命光诱导亚稳态的化学和物理因素。实现这些目标的方法学途径将包括合成新的络合物，并结合仔细的物理表征和理论分析。沿着这条线，来自磁力计设置、拉曼光谱、X射线测量、比热数据、穆斯堡尔光谱的实验结果应该提供详细的研究。拟议项目的两个团队多年来一直在铁(II)自旋交叉的热开关和光开关领域工作。它们显著的专门知识和互补性将使人们能够在这一强有力的跨学科领域获得新的见解，并为最终开发成像和显示设备量身定做材料的特性。

The interest in spin crossover compounds has considerably increased within the recent years following the that such species, exhibiting the possibility of thermal, pressure-, and light-induced switching between two different spin states, appear to have significant potential in the areas of signal processing and display devices. The aim of this proposal has three primary goals: (i) synthesis of new iron (II) spin crossover compounds with suitable electronic switching properties under the influence of heat, light, and pressure (ii) detailed understanding of the electronic process involved and the mechanism of the cooperative interactions (iii) identification of the chemical and physical factors which induce long-lived light-induced metastable spin states. The methodological approach to reach these goals will involve the synthesis of new complexes merged with careful physical characterizations and theoretical analyses. Along this line, experimental results from magnetometer setup, Raman spectroscopy, X-ray measurements, specific heat data, Mössbauer spectroscopy should provide detailed investigations. The two teams of the proposed project have been working in the field of thermal and optical switching of iron(II) spin crossover for many years. Their notable expertise and complementarity should allow to obtain new insights in this strong interdisciplinary field and to tailor the properties of the materials to the eventual development of devices for imaging and display.