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Enantioselective assembly of a ruthenium(II) polypyridyl complex into a double helix

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Abstract
Evolution can increase the complexity of matter by self-organization into helical architectures, the best example being the DNA double helix. One common aspect, apparently shared by most of these architectures, is the presence of covalent bonds within the helix backbone. Here, we report the unprecedented crystal structures of a metal complex that self-organizes into a continuous double helical structure, assembled by non-covalent building blocks. Built up solely by weak stacking interactions, this alternating tread stairs-like double helical assembly mimics the DNA double helix structure. Starting from a racemic mixture in aqueous solution, the ruthenium(II) polypyridyl complex forms two polymorphic structures of a left-handed double helical assembly of only the Lambda-enantiomer. The stacking of the helices is different in both polymorphs: a crossed woodpile structure versus a parallel columnar stacking.
Keywords
LIGANDS, SINGLE, INTERCALATION, STACKING, MATTER, CRYSTAL-STRUCTURES, SUPRAMOLECULAR POLYMERS, SELF-ORGANIZATION, HYDROGEN-BONDED PAIRS, self-assembly, double helix, enantiomer, polypyridyl, ruthenium

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Citation

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MLA
Van Hecke, Kristof, Thomas Cardinaels, Peter Nockemann, et al. “Enantioselective Assembly of a ruthenium(II) Polypyridyl Complex into a Double Helix.” ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 53.34 (2014): 8959–8962. Print.
APA
Van Hecke, K., Cardinaels, T., Nockemann, P., Jacobs, J., Vanpraet, L., Parac-Vogt, T. N., Van Deun, R., et al. (2014). Enantioselective assembly of a ruthenium(II) polypyridyl complex into a double helix. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 53(34), 8959–8962.
Chicago author-date
Van Hecke, Kristof, Thomas Cardinaels, Peter Nockemann, Jeroen Jacobs, Louis Vanpraet, Tatjana N Parac-Vogt, Rik Van Deun, Koen Binnemans, and Luc Van Meervelt. 2014. “Enantioselective Assembly of a ruthenium(II) Polypyridyl Complex into a Double Helix.” Angewandte Chemie-international Edition 53 (34): 8959–8962.
Chicago author-date (all authors)
Van Hecke, Kristof, Thomas Cardinaels, Peter Nockemann, Jeroen Jacobs, Louis Vanpraet, Tatjana N Parac-Vogt, Rik Van Deun, Koen Binnemans, and Luc Van Meervelt. 2014. “Enantioselective Assembly of a ruthenium(II) Polypyridyl Complex into a Double Helix.” Angewandte Chemie-international Edition 53 (34): 8959–8962.
Vancouver
1.
Van Hecke K, Cardinaels T, Nockemann P, Jacobs J, Vanpraet L, Parac-Vogt TN, et al. Enantioselective assembly of a ruthenium(II) polypyridyl complex into a double helix. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION. 2014;53(34):8959–62.
IEEE
[1]
K. Van Hecke et al., “Enantioselective assembly of a ruthenium(II) polypyridyl complex into a double helix,” ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, vol. 53, no. 34, pp. 8959–8962, 2014.
@article{4443120,
  abstract     = {Evolution can increase the complexity of matter by self-organization into helical architectures, the best example being the DNA double helix. One common aspect, apparently shared by most of these architectures, is the presence of covalent bonds within the helix backbone. Here, we report the unprecedented crystal structures of a metal complex that self-organizes into a continuous double helical structure, assembled by non-covalent building blocks. Built up solely by weak stacking interactions, this alternating tread stairs-like double helical assembly mimics the DNA double helix structure. Starting from a racemic mixture in aqueous solution, the ruthenium(II) polypyridyl complex forms two polymorphic structures of a left-handed double helical assembly of only the Lambda-enantiomer. The stacking of the helices is different in both polymorphs: a crossed woodpile structure versus a parallel columnar stacking.},
  author       = {Van Hecke, Kristof and Cardinaels, Thomas and Nockemann, Peter and Jacobs, Jeroen and Vanpraet, Louis and Parac-Vogt, Tatjana N and Van Deun, Rik and Binnemans, Koen and Van Meervelt, Luc},
  issn         = {1433-7851},
  journal      = {ANGEWANDTE CHEMIE-INTERNATIONAL EDITION},
  keywords     = {LIGANDS,SINGLE,INTERCALATION,STACKING,MATTER,CRYSTAL-STRUCTURES,SUPRAMOLECULAR POLYMERS,SELF-ORGANIZATION,HYDROGEN-BONDED PAIRS,self-assembly,double helix,enantiomer,polypyridyl,ruthenium},
  language     = {eng},
  number       = {34},
  pages        = {8959--8962},
  title        = {Enantioselective assembly of a ruthenium(II) polypyridyl complex into a double helix},
  url          = {http://dx.doi.org/10.1002/anie.201404496},
  volume       = {53},
  year         = {2014},
}

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