Light-Controlled Interconversion between a Self-Assembled Triangle and a Rhombicuboctahedral Sphere
Light-Controlled Interconversion between a Self-Assembled Triangle and a Rhombicuboctahedral Sphere
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DOI：
10.1002/anie.201508307
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发表时间：
2016-01-04
影响因子：
16.6
通讯作者：
Clever, Guido H.
中科院分区：
文献类型：
--
作者：
Han, Muxin;Luo, Yuansu;Clever, Guido H.
刺激响应性结构重组在生物过程中发挥着重要作用，通常与动力学控制方案相结合。在这种系统的超分子模拟中，光已经被确立为完美的外部触发器。在这里，我们报告的光驱动的结构重排的一个小的，自组装的Pd 3L 6环的光致变色二噻吩基乙烯（DTE）配体的基础上到一个菱形立方八面体Pd 24 L48球测量约6.4 nm的跨越。当波长改变时，这种相互转换可以完全逆转，如通过NMR和UV/维斯光谱以及质谱所证实的。通过AFM、TEM和GISAXS测量使球体可视化。由于光电开关构象的不同，两个组件之间的相互转换率在两个方向上是截然不同的。
Stimuli-responsive structural reorganizations play an important role in biological processes, often in combination with kinetic control scenarios. In supramolecular mimics of such systems, light has been established as the perfect external trigger. Here, we report on the light-driven structural rearrangement of a small, self-assembled Pd3L6 ring based on photochromic dithienylethene (DTE) ligands into a rhombicuboctahedral Pd24L48 sphere measuring about 6.4 nm across. When the wavelength is changed, this interconversion can be fully reversed, as confirmed by NMR and UV/Vis spectroscopy as well as mass spectrometry. The sphere was visualized by AFM, TEM, and GISAXS measurements. Due to dissimilarities in the photoswitch conformations, the interconversion rates between the two assemblies are drastically different in the two directions.