Cover Picture: Construction of Crown Ether-Stoppering [3]Rotaxanes Based on N -Hetero Crown Ether Host (Chin. J. Chem. 7/2017)
نویسندگان
چکیده
منابع مشابه
Responsive supramolecular gels constructed by crown ether based molecular recognition.
Responsive supramolecular gels were constructed from crown ether terminated four-arm star poly(epsilon-caprolactone) (PCL-DB24C8) and dibenzylammonium-terminated two-arm PCL-DBAS (see scheme), exploiting the formation of pseudorotaxane linkages between crown ether and ammonium moieties. The resultant supramolecular gels exhibit thermo- and pH-induced reversible gel-sol transition.
متن کاملConstruction of supramolecular organogels and hydrogels from crown ether based unsymmetric bolaamphiphiles.
A bolaamphiphilic low-molecular-weight gelator based on crown ether, which could self-assemble into organogels and hydrogels, was prepared. The contribution of each part of the structure to the gelation property was investigated by designing a series of analogues. A simple framework (crown ether-hydrophobic linkage-ammonium salt) was proposed.
متن کاملSelf-healing supramolecular gels formed by crown ether based host-guest interactions.
Automatic repair: a polymer with pendent dibenzo[24]crown-8 units (purple in picture) was cross-linked by two bisammonium salts (green) to form two supramolecular gels based on host-guest interactions. These two gels are stimuli-responsive materials that respond to changes of the pH value and are also self-healing materials, as can be seen by eye and as evidenced by rheological data.
متن کاملA pentiptycene-based bis(crown ether) host: synthesis and its complexation with cyclobis(paraquat-p-phenylene).
A novel pentiptycene-based bis(crown ether) host incorporating two dibenzo-24-crown-8 ether moieties has been synthesized, and its efficient complexation ability toward cyclobis(paraquat-p-phenylene) in solution and in the solid state has been explored.
متن کاملViscoelastic characterization of benzo-crown ether functionalized electroactive films.
Electrochemical, acoustic wave and imaging (AFM) methods were used to characterize electroactive poly[Ni(3-Mesalophen-b15-c5)] films. The distinct physical principles of these techniques generate different responses to film characteristics, such that their simplistic correlation in the context of a single uniform film model does not adequately describe the data. Film behaviour can only be ratio...
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ژورنال
عنوان ژورنال: Chinese Journal of Chemistry
سال: 2017
ISSN: 1001-604X
DOI: 10.1002/cjoc.201770071