Mimicking biological cation-transport based on sphere-surface supramolecular chemistry: Simultaneous interaction of porous capsules with molecular plugs and passing cations

Merca A, Haupt ETK, Mitra T, Bögge H, Rehder D, Müller A (2007)
Chemistry - a European Journal 13(27): 7650-7658.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Spherical capsules of the type [{(Mo)Mo-5}(12)[Mo-2(ligand)}(30)](n-) exhibiting 20 {Mo9O9} pores with crown ether functions allowed us to perform a sophisticated study of the title phenomenon based on synthetic work as well as NMR spectroscopy. The pores of the host system interact in solution specifically with guests that can be noncovalently bonded, such as formamidinium and acetamidinium cations, while having different affinities to the pores. The exchange between the guest species present in solution and in the pores was investigated, including, besides the extreme scenarios of complete pore closing and complete opening, that of stepwise pore plugging. Because of this option it was possible to model for the first time passive transmembrane cation transport based on gated pores/channels. These have the appropriate dimensions and can even adopt different structure flexibilities in response to different cations. The present investigation is based on related syntheses as well as on numerous detailed Li-7 NMR studies of Li+ transport/exchange equilibria in dependence of the pore environment/guest situations. One compound containing capsules with sulfate ligands (2) could be obtained in which all the pores are plugged with formamidinium cations and another corresponding one was obtained with additionally encapsulated Ca2+ ions (3); these were taken up after temporary release of some of the formamidinium plugs/guests upon short heating of the related solution.
Stichworte
polyoxometalates; supramolecular chemistry; NMR spectroscopy; nanocapsules; ion transport
Erscheinungsjahr
2007
Zeitschriftentitel
Chemistry - a European Journal
Band
13
Ausgabe
27
Seite(n)
7650-7658
ISSN
0947-6539
eISSN
1521-3765
Page URI
https://pub.uni-bielefeld.de/record/1631949

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Merca A, Haupt ETK, Mitra T, Bögge H, Rehder D, Müller A. Mimicking biological cation-transport based on sphere-surface supramolecular chemistry: Simultaneous interaction of porous capsules with molecular plugs and passing cations. Chemistry - a European Journal. 2007;13(27):7650-7658.
Merca, A., Haupt, E. T. K., Mitra, T., Bögge, H., Rehder, D., & Müller, A. (2007). Mimicking biological cation-transport based on sphere-surface supramolecular chemistry: Simultaneous interaction of porous capsules with molecular plugs and passing cations. Chemistry - a European Journal, 13(27), 7650-7658. doi:10.1002/chem.200700294
Merca, A., Haupt, E. T. K., Mitra, T., Bögge, H., Rehder, D., and Müller, A. (2007). Mimicking biological cation-transport based on sphere-surface supramolecular chemistry: Simultaneous interaction of porous capsules with molecular plugs and passing cations. Chemistry - a European Journal 13, 7650-7658.
Merca, A., et al., 2007. Mimicking biological cation-transport based on sphere-surface supramolecular chemistry: Simultaneous interaction of porous capsules with molecular plugs and passing cations. Chemistry - a European Journal, 13(27), p 7650-7658.
A. Merca, et al., “Mimicking biological cation-transport based on sphere-surface supramolecular chemistry: Simultaneous interaction of porous capsules with molecular plugs and passing cations”, Chemistry - a European Journal, vol. 13, 2007, pp. 7650-7658.
Merca, A., Haupt, E.T.K., Mitra, T., Bögge, H., Rehder, D., Müller, A.: Mimicking biological cation-transport based on sphere-surface supramolecular chemistry: Simultaneous interaction of porous capsules with molecular plugs and passing cations. Chemistry - a European Journal. 13, 7650-7658 (2007).
Merca, Alice, Haupt, Erhard T. K., Mitra, Tamoghna, Bögge, Hartmut, Rehder, Dieter, and Müller, Achim. “Mimicking biological cation-transport based on sphere-surface supramolecular chemistry: Simultaneous interaction of porous capsules with molecular plugs and passing cations”. Chemistry - a European Journal 13.27 (2007): 7650-7658.

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