Self-Assembly of a [2]Pseudorota[3]catenane in Water
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- 作者：Ross S. Forgan ; Jeremiah J. Gassensmith ; David B. Cordes ; Megan M. Boyle ; Karel J. Hartlieb ; Douglas C. Friedman ; Alexandra M. Z. Slawin ; J. Fraser Stoddart
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：October 17, 2012
- 年：2012
- 卷：134
- 期：41
- 页码：17007-17010
- 全文大小：353K
- 年卷期：v.134,no.41(October 17, 2012)
- ISSN：1520-5126
文摘
A donor鈥揳cceptor [3]catenane incorporating two cyclobis(paraquat-p-phenylene) rings linked together by a dinaphtho[50]crown-14 macrocycle possesses a 蟺-electron-deficient pocket. Contrary to expectation, negligible binding of a hexaethylene glycol chain interrupted in its midriff by a 蟺-electron-rich 1,5-dioxynaphthalene unit was observed in acetonitrile. However, a fortuitous solid-state superstructure of the expected 1:1 complex revealed its inability to embrace any stabilizing [C鈥揌路路路O] interactions between the clearly unwelcome guest and the host reluctantly accommodating it. By contrast, in aqueous solution, the 1:1 complex becomes very stable thanks to the intervention of hydrophobic bonding.