A reversible molecular valve
A reversible molecular valve
复制标题
DOI：
10.1073/pnas.0504109102
复制
发表时间：
2005-07-19
影响因子：
11.1
通讯作者：
Zink, JI
中科院分区：
文献类型：
--
作者：
Nguyen, TD;Tseng, HR;Zink, JI
在日常生活中，宏观阀门是一种带有可移动控制元件的装置，它通过堵塞和打开通道来调节气体或液体的流量。在纳米级上构建这样的设备需要(i)适当比例的可移动控制元件，（ii）按需操作它们的方法，以及（适合）适当大小的通道。这三个条件可以通过将有机的、机械互锁的、可以在化学、电或光学刺激下操作的线性马达分子附着在稳定的无机多孔框架上来实现（即，通过在无机底盘上自组装有机机械）。在这篇文章中，我们展示了一个可逆操作的纳米阀，可以通过氧化还原化学打开和关闭。它通过控制氧化还原激活的双稳态[2]轮烷分子的操作，将分子从二氧化硅中迷宫般的纳米通道中捕获和释放出来，这些分子被拴在纳米孔的开口上，从而引出纳米级储层。
In everyday life, a macroscopic valve is a device with a movable control element that regulates the flow of gases or liquids by blocking and opening passageways. Construction of such a device on the nanoscale level requires (i) suitably proportioned movable control elements, (ii) a method for operating them on demand, and (fit) appropriately sized passageways. These three conditions can be fulfilled by attaching organic, mechanically interlocked, linear motor molecules that can be operated under chemical, electrical, or optical stimuli to stable inorganic porous frameworks (i.e., by self-assembling organic machinery on top of an inorganic chassis). In this article, we demonstrate a reversibly operating nanovalve that can be turned on and off by redox chemistry. It traps and releases molecules from a maze of nanoscopic passageways in silica by controlling the operation of redox-activated bistable [2]rotaxane molecules tethered to the openings of nanopores leading out of a nanoscale reservoir.