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Solvent-induced high fidelity switching between two discrete supramolecules.


ABSTRACT: Here we show the reversible high fidelity switching between two discrete self-assembled supramolecules made from a lipophilic 8-phenyl-2'-deoxyguanosine derivative induced by an indirect solvent effect. A hexadecameric supramolecule containing four stacked tetramers is formed in acetonitrile aided by higher potassium concentrations. When the amount of weakly solvated potassium decreases, due the lower activity of potassium iodide in chloroform, an octamer is formed after the dissociation of the two outer tetramers in the hexadecamer. The switching process results from an unprecedented subtle interplay between the activity of potassium iodide and the steric crowding within the self-assembled structure. Besides the possible applications in nanoconstruction, this phenomenon sheds light into the mechanism of formation of self-assembled supramolecules made from guanosine derivatives.

SUBMITTER: Betancourt JE 

PROVIDER: S-EPMC2880642 | biostudies-literature | 2009 Mar

REPOSITORIES: biostudies-literature

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Solvent-induced high fidelity switching between two discrete supramolecules.

Betancourt José E JE   Martín-Hidalgo Mariana M   Gubala Vladimir V   Rivera José M JM  

Journal of the American Chemical Society 20090301 9


Here we show the reversible high fidelity switching between two discrete self-assembled supramolecules made from a lipophilic 8-phenyl-2'-deoxyguanosine derivative induced by an indirect solvent effect. A hexadecameric supramolecule containing four stacked tetramers is formed in acetonitrile aided by higher potassium concentrations. When the amount of weakly solvated potassium decreases, due the lower activity of potassium iodide in chloroform, an octamer is formed after the dissociation of the  ...[more]

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