Coupled linear and rotary motion in supramolecular helix handedness inversion
Coupled linear and rotary motion in supramolecular helix handedness inversion
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DOI：
10.1039/c0sm01507e
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发表时间：
2011-01-01
期刊：
影响因子：
3.4
通讯作者：
Wales, David J.
中科院分区：
文献类型：
--
作者：
Chakrabarti, Dwaipayan;Wales, David J.
我们报告了一个显着的途径，在一个模型的超分子螺旋，表现出重复的延伸和收缩，再加上相关的旋转旋向反转。该路径涉及两个相反旋向的区段之间的边界，其通过跳跃机制沿螺旋沿着传播，导致两个区段之间的间隙的周期性打开和关闭，同时它们在相反方向上协同旋转。虽然跳跃机制可能有更广泛的影响，一般的螺旋旋向反转，这样一个途径的存在表明，设计一类新的纳米级机器利用螺旋旋向反转的可能性。
We report on a remarkable pathway for the inversion of handedness in a model supramolecular helix that exhibits repeated extension and contraction coupled with correlated rotation. The pathway involves a boundary between two segments of opposite handedness, which propagates along the helix through a hopping mechanism, causing periodic opening and closing of a gap between the two segments, while they rotate cooperatively in opposite directions. While the hopping mechanism is likely to have wider implications for reversal of helix handedness in general, the existence of such a pathway suggests the possibility of designing a novel class of nanoscale machines exploiting helix handedness inversion.