نتایج جستجو برای: rotaxane
تعداد نتایج: 512 فیلتر نتایج به سال:
Fine-tuning the charge transfer chromophores in a series of [2]rotaxane flip-switches yields a unique optical signal (purple colour) for one of the interactions allowing for facile determination of the position of the flip-switch equilibrium.
A light-driven [1]rotaxane was prepared conveniently and directly through self-inclusion complexation of an azobenzene-modified beta-CD and Suzuki-coupling capping in aqueous solution, and its photoisomerization was thoroughly investigated.
In rotaxane 1, two co-conformations are populated in CDCl(3) at temperatures between 250 and 330 K. The thermodynamic parameters show strong enthalpy-entropy compensation, and a non-negligible heat capacity difference between the two forms.
A novel halogen bonding bis(iodotriazole)-imidazolium axle containing [2]rotaxane is capable of strong halide and sulfate binding in highly competitive aqueous–organic solvent mixtures.
Rotaxane-structure-specific Pd-catalyzed rearrangement of propargyl or allyl urethane groups to oxazolidinone moieties proceeded efficiently. The conversion took place successively by the translation of the wheel along the axle, thus providing a novel macrocyclic catalytic system.
A neutral heteroditopic pyridine N-oxide axle containing [2]rotaxane, synthesised via sodium cation templation, displays cooperative recognition of alkali metal cation-halide anion ion-pairs in an unprecedented axle component separated ion-pair binding fashion.
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