C. Rest
Self-Assembly and (Hydro)gelation Triggered by Cooperative π–π and Unconventional C[BOND]H⋅⋅⋅X Hydrogen Bonding Interactions
Rest, C.; Mayoral, M.J.; Fucke, K.; Shellheimer, J.; Stepanenko, V.; Fernández, G.
Authors
M.J. Mayoral
K. Fucke
J. Shellheimer
V. Stepanenko
G. Fernández
Abstract
Weak C[BOND]H⋅⋅⋅X hydrogen bonds are important stabilizing forces in crystal engineering and anion recognition in solution. In contrast, their quantitative influence on the stabilization of supramolecular polymers or gels has thus far remained unexplored. Herein, we report an oligophenyleneethynylene (OPE)-based amphiphilic PtII complex that forms supramolecular polymeric structures in aqueous and polar media driven by π–π and different weak C-H⋅⋅⋅X (X=Cl, O) interactions involving chlorine atoms attached to the PtII centers as well as oxygen atoms and polarized methylene groups belonging to the peripheral glycol chains. A collection of experimental techniques (UV/Vis, 1D and 2D NMR, DLS, AFM, SEM, and X-Ray diffraction) demonstrate that the interplay between different weak noncovalent interactions leads to the cooperative formation of self-assembled structures of high aspect ratio and gels in which the molecular arrangement is maintained in the crystalline state.
Citation
Rest, C., Mayoral, M., Fucke, K., Shellheimer, J., Stepanenko, V., & Fernández, G. (2014). Self-Assembly and (Hydro)gelation Triggered by Cooperative π–π and Unconventional C[BOND]H⋅⋅⋅X Hydrogen Bonding Interactions. Angewandte Chemie International Edition, 53(3), 700-705. https://doi.org/10.1002/anie.201307806
Journal Article Type | Article |
---|---|
Online Publication Date | Dec 18, 2013 |
Publication Date | Jan 13, 2014 |
Deposit Date | Feb 28, 2014 |
Journal | Angewandte Chemie International Edition |
Print ISSN | 1433-7851 |
Electronic ISSN | 1521-3773 |
Publisher | Wiley |
Peer Reviewed | Peer Reviewed |
Volume | 53 |
Issue | 3 |
Pages | 700-705 |
DOI | https://doi.org/10.1002/anie.201307806 |
Keywords | Amphiphiles, Cooperativity, Supramolecular polymerization, X–H hydrogen bonds, π-conjugated systems. |
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