Ranging correlated motion (1.5 nm) of two coaxially arranged rotors mediated by helix inversion of a supramolecular transmitter
Ranging correlated motion (1.5 nm) of two coaxially arranged rotors mediated by helix inversion of a supramolecular transmitter
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DOI：
10.1021/ja8014583
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发表时间：
2008-07-16
影响因子：
15
通讯作者：
Shionoya, Mitsuhiko
中科院分区：
文献类型：
--
作者：
Hiraoka, Shuichi;Okuno, Erika;Shionoya, Mitsuhiko
为了在彼此分离的两个可移动部件之间远距离传输运动，应适当地将能够精确关联这两个运动的发射器纳入系统。然而，由于缺乏可靠的方法来安排离散数量的运动部件，这种运动继电器尚未在人工系统中实现。本文报道了以1.5 nm的距离同轴排列的两个转子分子通过Ag+-或Hg2+-组装的螺旋发射器进行相关运动，导致不同频率的同步运动。一个螺旋反转在发射器被证明强烈关联两个终端的运动。该实体的x射线分析确定了金属配合物的四层非核结构，包括两个末端转子状配体，紧密连接到中心发射器部分。H-1核磁共振分析充分证明了两个转子同轴堆叠并通过发射机连接的同步运动。由于发射器由简单的螺旋重复单元组成，螺旋反转原理将是一种有效且广泛适用的分子运动远程传输策略。
For a long-range transmission of motion between two movable parts apart from each other, transmitters that can precisely correlate these two motions should be properly incorporated into the system. However, such a motional relay is yet to be realized in artificial systems because of the lack of reliable methodologies for arranging a discrete number of motional parts. Herein, we report a correlated motion of two rotor molecules, which are coaxially arranged at a distance of 1.5 nm, through either Ag+- or Hg2+-assembled helical transmitters, leading to different frequencies of synchronized motion. A helix inversion in the transmitter was proven to strongly correlate the motions of both terminals. The X-ray analysis of the entity determined a quadruple-decker nonanuclear structure of the metal complex comprising two terminal rotor-like ligands closely attached to a central transmitter moiety. H-1 NMR analysis fully demonstrated the synchronized motion of the two rotors coaxially stacked and connected through the transmitter. Since the transmitter is composed of simple helical repeating units, the principle of helix inversion would be an efficient and widely applicable strategy for the long-range transmission of molecular motion.