Structure and properties of dynamic rigid rod-like metallo-supramolecular polyelectrolytes in solution
- Metal-ion-induced self-assembly in aqueous solution of the rigid ligand 1,4-bis(2,2':6',2 ''-terpyridine-4'-yl)benzene (1) with Fe(OAc)(2) and Ni(OAc)(2) is investigated with viscosimetry, SANS, and AFM. Ligand 1 forms extended, rigid-rod like metallo-supramolecular coordination polyeectrolytes (MEPEs) with a molar mass of up to 200 000 g mol(-1) under the Current experimental conditions. The molar mass depends oil concentration, stoichiometry, and time. By spin-coating MEPEs oil a solid surface, we call image the MEPEs in real space by AFM. Both AFM and SANS confirm the extended rigid-rod-type structure of the MEPEs. As a control experiment, we also studied the flexible ligand 1,3-bis[4'-oxa(2,2':6',2 ''-terpyridinyl)]propane (2). Ligand 2 does not form extended macro-assemblies but likely ringlike structures with three 10 four repeat units. Finally, we present it protocol to control the stoichiometry during self-assembly using conductometry, which is of paramount importance to obtain meaningful and reproducible results.
Verfasserangaben: | Guntram Schwarz, Yves Bodenthin, Thomas Geue, Joachim KoetzORCiDGND, Dirk G. Kurth |
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URL: | http://pubs.acs.org/doi/full/10.1021/ma902057f |
DOI: | https://doi.org/10.1021/Ma902057f |
ISSN: | 0024-9297 |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2010 |
Erscheinungsjahr: | 2010 |
Datum der Freischaltung: | 24.03.2017 |
Quelle: | Macromolecules. - ISSN 0024-9297. - 43 (2010), 1, S. 494 - 500 |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
Peer Review: | Referiert |