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Supramolecular nesting of cyclic polymers

Kondratuk, Dmitry V.; Perdigão, Luis M.A.; Esmail, Ayad M.S.; O'Shea, James N.; Beton, Peter H.; Anderson, Harry L.

Authors

Dmitry V. Kondratuk

Luis M.A. Perdigão

Ayad M.S. Esmail

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JAMES O'SHEA J.OSHEA@NOTTINGHAM.AC.UK
Associate Professor and Reader Inphysics

Harry L. Anderson



Abstract

Advances in template-directed synthesis make it possible to create artificial molecules with protein-like dimensions, directly from simple components. These synthetic macromolecules have a proclivity for self-organization that is reminiscent of biopolymers. Here, we report the synthesis of monodisperse cyclic porphyrin polymers, with diameters of up to 21 nm (750 C–C bonds). The ratio of the intrinsic viscosities for cyclic and linear topologies is 0.72, indicating that these polymers behave as almost ideal flexible chains in solution. When deposited on ​gold surfaces, the cyclic polymers display a new mode of two-dimensional supramolecular organization, combining encapsulation and nesting; one nanoring adopts a near-circular conformation, thus allowing a second nanoring to be captured within its perimeter, in a tightly folded conformation. Scanning tunnelling microscopy reveals that nesting occurs in combination with stacking when nanorings are deposited under vacuum, whereas when they are deposited directly from solution under ambient conditions there is stacking or nesting, but not a combination of both.

Journal Article Type Article
Publication Date 2015-04
Journal Nature Chemistry
Print ISSN 1755-4330
Electronic ISSN 1755-4349
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 7
Issue 4
Pages 317-322
APA6 Citation Kondratuk, D. V., Perdigão, L. M., Esmail, A. M., O'Shea, J. N., Beton, P. H., & Anderson, H. L. (2015). Supramolecular nesting of cyclic polymers. Nature Chemistry, 7(4), 317-322. https://doi.org/10.1038/nchem.2182
DOI https://doi.org/10.1038/nchem.2182
Keywords Molecular self-assembly, Scanning probe microscopy, Self-assembly, Surface assembly
Publisher URL http://www.nature.com/nchem/journal/v7/n4/full/nchem.2182.html
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information Received: 1 August 2014; Accepted: 13 January 2015; First Online: 16 February 2015; : The authors declare no competing financial interests.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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