Energetically Demanding Transport in a Supramolecular Assembly
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- 作者：Chuyang Cheng ; Paul R. McGonigal ; Wei-Guang Liu ; Hao Li ; Nicolaas A. Vermeulen ; Chenfeng Ke ; Marco Frasconi ; Charlotte L. Stern ; William A. Goddard III ; J. Fraser Stoddart
- 刊名：Journal of the American Chemical Society
- 出版年：2014
- 出版时间：October 22, 2014
- 年：2014
- 卷：136
- 期：42
- 页码：14702-14705
- 全文大小：304K
- ISSN：1520-5126
文摘
A challenge in contemporary chemistry is the realization of artificial molecular machines that can perform work in solution on their environments. Here, we report on the design and production of a supramolecular flashing energy ratchet capable of processing chemical fuel generated by redox changes to drive a ring in one direction relative to a dumbbell toward an energetically uphill state. The kinetics of the reaction pathway juxtapose a low energy [2]pseudorotaxane that forms under equilibrium conditions with a high energy, metastable [2]pseudorotaxane which resides away from equilibrium.