Title: Lanthanide(III)-induced conversion of 12-metallacrown-4 to 5-metallacrown-5 complexes in solution
Authors: Pacco, Antoine
Parac-Vogt, Tatjana
van Besien, Els
Pierloot, Kristine
Görller-Walrand, Christiane
Binnemans, Koen # ×
Issue Date: 2005
Publisher: Wiley-v c h verlag gmbh
Series Title: European journal of inorganic chemistry issue:16 pages:3303-3310
Abstract: The conversion of 12-metallacrown-4 complexes with copper(II) in the central cavity to 15-metallacrown-5 complexes with lanthanide(iii) ions in the central cavity upon addition of trivalent lanthanide ions was analysed in solution by electrospray ionisation mass spectrometry (ESI-MS), absorption spectrophotometry, circular dichroism and proton NMR spectroscopy. In all cases, copper(II) ions were the ring metals. The lanthanide-induced shifts of the proton resonances in the NMR spectra of different lanthanide (m)-containing 15-metallacrown-5 complexes with tyrosinehydroximate ligands were studied. The dynamics of ligand exchange of alpha-aminohydroximate-based lanthanide (iii) -containing 15-metallacrown-5 complexes were studied in methanol solutions. The ring structure of the 12-metallacrown-4 complex that acts as starting compound for the formation of the 15-metallacrown-5 complexes was optimized by DFT methods using alanine-hydroximate as a model ligand.
ISSN: 1434-1948
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Design and Synthesis
Quantum Chemistry and Physical Chemistry Section
Chemistry - miscellaneous
× corresponding author
# (joint) last author

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