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  Synthesis and characterization of dinuclear heterometallic lanthanide complexes exhibiting MRI and luminescence response

Mamedov, I., Parac-Vogt, T., Logothetis, N., & Angelovski, G. (2010). Synthesis and characterization of dinuclear heterometallic lanthanide complexes exhibiting MRI and luminescence response. Dalton Transactions, 39(24), 5721-5727. doi:10.1039/b925556g.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-C02E-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-76C1-F
Genre: Journal Article

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Mamedov, I1, 2, Author              
Parac-Vogt, TN, Author
Logothetis, NK1, 2, Author              
Angelovski, G1, 2, Author              
Affiliations:
1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: A molecule bearing a macrocyclic DOTA-type chelator and an acyclic chelator based on the 5-aminoisophthalamide diethylenediaminetetraacid (5A-PADDTA) was synthesized by linking these two moieties via an amide bond. The ligand has the possibility to complex two identical or different lanthanide ions, depending on the desire for its potential application. Luminescence studies involving titrations of the Eu3+ or Gd3+ complex with Tb3+ confirm the formation of heterometallic complexes, as well as the presence of different species in the solution. Comparative 1H NMR spectra of the ligand, its Eu3+ complex, and that containing both Eu3+ and Tb3+ proves the existence of respective monometallic or bimetallic species. NMR diffusion measurements on 5A-PADDTA as a model compound indicate the formation of aggregates upon the addition of Y3+ (chosen as a diamagnetic analogue of lanthanide ions). Hydration values were calculated from the respective luminescence lifetime values. They show the dominance of a q = 1 species for both ions in monometallic complexes, or q = 1 and q = 2 species of ions in aggregated complexes, for DOTA and 5A-PADDTA chelators, respectively.

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 Dates: 2010-05
 Publication Status: Published in print
 Pages: -
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 Rev. Method: -
 Identifiers: DOI: 10.1039/b925556g
BibTex Citekey: 6594
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Title: Dalton Transactions
  Abbreviation : Dalton Trans.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 39 (24) Sequence Number: - Start / End Page: 5721 - 5727 Identifier: ISSN: 1477-9226
CoNE: https://pure.mpg.de/cone/journals/resource/954925269323