287192-82-9Relevant academic research and scientific papers
Secondary dibenzylammonium ion binding by [24]crown-8 and [25]crown-8 macrocycles
Ashton, Peter R.,Bartsch, Richard A.,Cantrill, Stuart J.,Hanes Jr., Robert E.,Hickingbottom, Sarah K.,Lowe, James N.,Preece, Jon A.,Stoddart, J. Fraser,Talanov, Vladimir S.,Wang, Zhen-He
, p. 3661 - 3664 (1999)
A range of crown ethers with either [24]crown-8 or [25]crown-8 constitutions have been demonstrated to form pseudorotaxanes with para- disubstituted dibenzylammonium ions, both in solution and in the 'gas phase' by 1H NMR spectroscopy and liqui
Synthesis of Novel Di Benzo spiro bis-crown-ether
Lari, Jalil,Moradgholi, Fatemeh,Vahedi, Hooshang,Massoudi, Abdolhossein
, p. 668 - 673 (2015/11/09)
This paper focuses on the synthesis of a wide variety of di benzo spiro bis-crown compounds, in good yields using di-phenols, mono tosylates of oligoethylene glycols and caesium carbonate in acetonitrile.
Construction of hetero[n]rotaxanes by use of polyfunctional rotaxane frameworks
Li, Ziyong,Liu, Guoxing,Xue, Wen,Wu, Di,Yang, Ying-Wei,Wu, Jishan,Liu, Sheng Hua,Yoon, Juyoung,Yin, Jun
, p. 11560 - 11570 (2013/12/04)
Heterorotaxanes, one class of topological organic structures, have attracted increasing interesting during the past two decades. In general, two types of heterorotaxane structures exist, one in which two or more different macrocycles are threaded onto one dumbbell-shaped molecule and the other where one macrocycle is threaded onto two or more different dumbbell-shaped molecules. In comparison to these traditional types, another family of topologically interesting heterorotaxanes can be envisaged as arising from polyfunctional molecules that possess both host (crown ether) and guest (ammonium templates). In the present investigation, we have explored the construction of selected members of this new heterorotaxane family, which possess crown ether moieties that are wrapped around a dumbbell-shaped molecule. These structures are prepared by routes in which "stitching" processes, involving template-directed clipping reaction or olefin metathesis reactions, are used to install crown ether ring systems encircling ammonium cation centers. This is then followed by implementation of a threading-followed-by-stoppering sequence to install a second encircling crown ether ring. The results show that the polyfunctional building blocks assemble with high efficiencies. Finally, this investigation provides a foundation for future studies aimed at constructing more complicated heterorotaxane architectures, such as switchable systems, self-assembling polymers, and functional molecular machines.
The influence of macrocyclic polyether constitution upon ammonium ion/crown ether recognition processes
Cantrill, Stuart J.,Fulton, David A.,Heiss, Aaron M.,Pease, Anthony R.,Stoddart, J. Fraser,White, Andrew J. P.,Williams, David J.
, p. 2274 - 2287 (2007/10/03)
Secondary dialkylammonium (R2NH2+) ions are hound readily by dibenzo[24]crown-8 (DB24C8) to form threaded complexes, namely [2]pseudorotaxanes. The effect of replacing one or both of the catechol rings in DB24C8 with resor
