Molecular redox switches based on chemical triggering of iron translocation in triple-stranded helical complexes
Molecular redox switches based on chemical triggering of iron translocation in triple-stranded helical complexes
复制标题
基于三链螺旋复合物中铁易位化学触发的分子氧化还原开关
作者：
L. Zelikovich;J. Libman;A. Shanzer
对电子元件小型化的日益增长的兴趣刺激了对具有类似器件功能的分子组装的研究1 -5。据报道，基于分子的器件可以用作传感器6 -8，二极管9 -11，逻辑门12和开关5，13-19。理想情况下，分子开关应该能够对外部干扰物进行可控和可逆的响应7，12，14，15，20，21。在这里，我们报告的螺旋金属络合物22 -29的基础上，其中铁离子可以占据两个不同的结合腔之一的分子氧化还原开关的合成。由于Fe（II）和Fe（Ni）状态的不同配位偏好，这些位点之间的金属离子的可逆易位通过化学氧化和还原来实现，并且可以容易地通过光谱来监测。
THEgrowing interest in miniaturization of electronic components is stimulating research on molecular assemblies with device-like functionalities1–5. Molecule-based devices have been reported that might act as sensors6–8, diodes9–11, logic gates12 and switches5,13–19. Molecular switches should ideally be able to respond controllably and reversibly to external triggers7,12,14,15,20,21. Here we report the synthesis of molecular redox switches based on helical metal complexes22–29 in which an iron ion can occupy one of two distinct binding cavities. Reversible translocation of the metal ion between these sites is achieved by chemical oxidation and reduction, owing to the different coordination preferences of the Fe(ii) and Fe(ni) states, and can be readily monitored spectroscopically.