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  Carboxylic Acid-Doped SBA-15 Silica as a Host for Metallo-supramolecular Coordination Polymers

Akcakayiran, D., Mauder, D., Hess, C., Sievers, T. K., Kurth, D. G., Shenderovich, I., et al. (2008). Carboxylic Acid-Doped SBA-15 Silica as a Host for Metallo-supramolecular Coordination Polymers. Journal of Physical Chemistry B, 112(46), 14637-14647. Retrieved from http://dx.doi.org/10.1021/jp804712w.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-FB84-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-FB85-4
Genre: Journal Article

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 Creators:
Akcakayiran, D., Author
Mauder, D., Author
Hess, Christian1, Author              
Sievers, T. K.2, Author
Kurth, D. G.2, Author
Shenderovich, I., Author
Limbach, H. H., Author
Findenegg, G. H., Author
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Max Planck Society, ou_persistent13              

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Free keywords: Mesoscopically Organized Composites; Supported vanadia catalysts V-oxides: clusters and catalysts; preparation & internal structure
 Abstract: The adsorption of a metallo-supramolecular coordination polymer (Fe−MEPE) in the cylindrical pores of SBA-15 silica with pure and carboxylic acid (CA) carrying pore walls has been studied. Fe−MEPE is an intrinsically stiff polycation formed by complexation of Fe(II)−acetate with an uncharged ditopic bis-terpyridine ligand. The adsorption affinity and kinetics of the Fe−MEPE chains is strongly enhanced when the pore walls are doped with CA, and when the pH of the aqueous medium or temperature is increased. The initial fast uptake is connected with a decrease of pH of the aqueous solution, indicating an ion-exchange mechanism. It is followed by a slower (presumably diffusion-controlled) further uptake. The maximum adsorbed amount of Fe−MEPE in the CA-doped material corresponds to a monolayer of Fe−MEPE chains disposed side-by-side along the pore walls. The stoichiometry of Fe−MEPE in the pores (determined by XPS) was found to be independent of the loading and similar to that of the starting material. The mean chain length of Fe−MEPE before and after embedding in the CA-doped matrix was studied by solid-state 15N NMR using partially 15N-labeled Fe−MEPE. It is shown that the average chain length of Fe−MEPE is reduced when the complex is incorporated in the pores.

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Language(s): eng - English
 Dates: 2008-11-20
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 403370
URI: http://dx.doi.org/10.1021/jp804712w
 Degree: -

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Title: Journal of Physical Chemistry B
  Alternative Title : J. Phys. Chem. B
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 112 (46) Sequence Number: - Start / End Page: 14637 - 14647 Identifier: ISSN: 1520-6106