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From Ribbons to Networks: Hierarchical Organization of DNA-Grafted Supramolecular Polymers
journal contribution
posted on 2015-11-11, 00:00 authored by Yuliia Vyborna, Mykhailo Vybornyi, Robert HänerDNA-grafted
supramolecular polymers (SPs) allow the programmed
organization of DNA in a highly regular, one-dimensional array. Oligonucleotides
are arranged along the edges of pyrene-based helical polymers. Addition
of complementary oligonucleotides triggers the assembly of individual
nanoribbons resulting in the development of extended supramolecular
networks. Network formation is enabled by cooperative coaxial stacking
interactions of terminal GC base pairs. The process is accompanied
by structural changes in the pyrene polymer core that can be followed
spectroscopically. Network formation is reversible, and disassembly
into individual ribbons is realized either via thermal denaturation
or by addition of a DNA separator strand.
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