Coupled molecular switching processes in ordered mono- and multilayers of stimulus-responsive rotaxanes on gold surfaces.
Coupled molecular switching processes in ordered mono- and multilayers of stimulus-responsive rotaxanes on gold surfaces.
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DOI：
10.1021/ja512654d
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发表时间：
2015-04-08
影响因子：
15
通讯作者：
Schalley, Christoph A.
中科院分区：
文献类型：
--
作者：
Heinrich, Thomas;Traulsen, Christoph H. -H.;Holzweber, Markus;Richter, Sebastian;Kunz, Valentin;Kastner, Sarah K.;Krabbenborg, Sven O.;Huskens, Jurriaan;Unger, Wolfgang E. S.;Schalley, Christoph A.
界面提供了功能的结构基础，例如在膜嵌入式光系统或太阳能电池技术中遇到的功能。以耦合方式协作的合成功能性分子多层可以通过逐层自组装在表面上制造。经历良好控制的轴穿梭的刺激响应轮烷的有序阵列是耦合机械运动的优秀候选者。这种刺激响应表面可能有助于将合成分子机器集成到更大的系统中，甚至表现出宏观效应或通过协作作用从化学能产生机械功。目前的工作证明了在金表面成功沉积有序单层和多层化学可转换轮烷。角分辨 NEXAFS 光谱中的线性二色性效应揭示了轮烷单层和多层以耦合方式在两种有序状态之间可逆地转换。只有当表面堆积良好时，才能观察到这种协调的切换过程，而缺乏横向顺序的密度较低的表面则不会表现出这种效果。
Interfaces provide the structural basis for function as, for example, encountered in nature in the membrane-embedded photosystem or in technology in solar cells. Synthetic functional multilayers of molecules cooperating in a coupled manner can be fabricated on surfaces through layer-by-layer self-assembly. Ordered arrays of stimulus-responsive rotaxanes undergoing well-controlled axle shuttling are excellent candidates for coupled mechanical motion. Such stimulus-responsive surfaces may help integrate synthetic molecular machines in larger systems exhibiting even macroscopic effects or generating mechanical work from chemical energy through cooperative action. The present work demonstrates the successful deposition of ordered mono- and multilayers of chemically switchable rotaxanes on gold surfaces. Rotaxane mono- and multilayers are shown to reversibly switch in a coupled manner between two ordered states as revealed by linear dichroism effects in angle-resolved NEXAFS spectra. Such a concerted switching process is observed only when the surfaces are well packed, while less densely packed surfaces lacking lateral order do not exhibit such effects.
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影响因子：
15
作者：
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通讯作者：
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影响因子：
2.3
作者：
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DOI：
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发表时间：
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影响因子：
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作者：
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作者：
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