Shielded alkyl-functionalised rotaxane host cavities for improved anion recognition
作者:Lydia C. Gilday、Nicholas G. White、Paul D. Beer
DOI:10.1080/10610278.2015.1075538
日期:2016.2.1
The synthesis and anionrecognition properties of four novel [2]rotaxane host architectures containing additional alkyl functionality integrated within macrocyclic and axle components to shield the binding cavity from the solvent are described. The rotaxane species containing a tetra(methyl)-functionalised macrocycle component is found to be a weaker anion complexant than the equivalent unfunctionalised
Anion induced displacement studies in naphthalene diimide containing interpenetrated and interlocked structures
作者:Kathleen M. Mullen、Jason J. Davis、Paul D. Beer
DOI:10.1039/b819322c
日期:——
This article describes investigations into the development of supramolecular systems capable of sensing anions through either displacement type assays or molecular motion. An electron deficient naphthalene diimide thread and an electron rich isophthalamide naphthohydroquinone macrocycle were shown to form a coloured pseudorotaxane assembly. Investigations into the ability of such interpenetrated systems to sense anions colorimetrically were undertaken. Anion complexation at the isophthalamide group of the macrocycle causes displacement of the naphthodiimide thread resulting in the loss of colour. The enhanced mechanically bonded binding strength between the naphthodiimide axle and the naphthohydroquinone groups of the macrocycle wheel in the corresponding rotaxane structure, however, was found to negate the anion induced displacement process.
Sodium and barium cation-templated synthesis and cation-induced molecular pirouetting of a pyridine N-oxide containing [2]rotaxane
作者:Laura M. Hancock、Paul D. Beer
DOI:10.1039/c1cc11224d
日期:——
Sodium and barium metal cation templation has been used to construct a novel pyridine N-oxide containing [2]rotaxane. Upon addition and removal of metal cations, the macrocyclic component is observed to undergo a pirouetting motion around the pyridine N-oxide axle.