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- W2022043302 endingPage "4009" @default.
- W2022043302 startingPage "3999" @default.
- W2022043302 abstract "A series of crown ether derivatives functionalised with dendritic branching based on l-lysine repeat units has been synthesised. The ability of these receptors to interact with cationic guests has been investigated using NMR and mass spectrometric techniques. Binding constants have been evaluated, some using competitive binding assays, and these indicate that the strength of interaction between the encapsulated crown-ether and cationic guests decreases with increasing dendritic functionalisation. The interaction of these dendritic branches with ditopic ammonium cation functionalised templates has been investigated, and Job plot analysis indicates the formation of 2:1 (branch/template) stoichiometric complexes in MeOH solution. These supramolecular assemblies have been disassembled by the addition of potassium cations, hence achieving controlled release of the template back into solution. This process has been investigated by NMR methods and the effect of counteranion on these studies is reported. The use of ditopic ammonium cations possessing long alkyl spacer chains as templates has also been investigated, and in this case, the 2:1 assembly that forms, goes on to achieve higher order levels of organisation, hence gelating the solvent. This particular system is therefore a rare example in which discrete, characterisable dendritic supermolecules possess an inherent potential for further supramolecular assembly, to yield new materials." @default.
- W2022043302 created "2016-06-24" @default.
- W2022043302 creator A5020017389 @default.
- W2022043302 creator A5081425132 @default.
- W2022043302 date "2003-05-01" @default.
- W2022043302 modified "2023-10-13" @default.
- W2022043302 title "Supramolecular dendrimer chemistry: using dendritic crown ethers to reversibly generate functional assemblies" @default.
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