Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks

Sørensen, Thomas Just; Tropiano, Manuel; Kenwright, Alan M.; Faulkner, Stephen

Abstract

Three molecular structures, each containing three different lanthanide(III) centres, have been prepared by coupling three kinetically inert lanthanide(III) complexes in an Ugi reaction. These 2 kDa molecules were purified by dialysis and characterised by NMR and luminescence techniques. The photophysical properties of these heterotrimetallic complexes were investigated and are discussed by comparison with simpler, but related, heterodimetallic compounds. It was found that an aminonaphthalene unit inhibits the sensitisation of terbium, and that the spatial arrangement of the chromophores and lanthanide(III) centres in these molecules inhibits the efficient sensitisation of europium. We conclude that the intramolecular collisions required for efficient Dexter energy transfer from the sensitiser to the lanthanide(III) centre can be prevented by steric congestion.

Citation

Sørensen, T. J., Tropiano, M., Kenwright, A. M., & Faulkner, S. (2017). Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks. European Journal of Inorganic Chemistry, 2017(15), 2165-2172. https://doi.org/10.1002/ejic.201700027

• Journal Article Type: Article
• Acceptance Date: Jan 31, 2017
• Online Publication Date: Feb 20, 2017
• Publication Date: Apr 18, 2017
• Deposit Date: May 20, 2017
• Publicly Available Date: Apr 23, 2018
• Journal: European Journal of Inorganic Chemistry
• Print ISSN: 1434-1948
• Electronic ISSN: 1099-0682
• Publisher: Wiley-VCH Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 2017
• Issue: 15
• Pages: 2165-2172
• DOI: https://doi.org/10.1002/ejic.201700027
• Public URL: https://durham-repository.worktribe.com/output/1358677
• Related Public URLs: https://ora.ox.ac.uk/objects/uuid:53c03be0-1dbb-4622-8740-989397f52ffb