Issue 31, 2018

Highly luminescent lanthanide complexes sensitised by tertiary amide-linked carbostyril antennae

Abstract

Carbostyrils are among the most widely used sensitising antennae for luminescent lanthanides; they afford bright complexes with Eu and Tb, and can also sensitise the emissions of the less commonly used Sm, Dy, Yb and Nd. Systematic studies on the effect of structural variations on the photophysical properties and lanthanide sensitising abilities of carbostyrils can therefore have a large impact. We replaced the secondary amide linker that connects the metal binding site to the antenna with a carboxymethyl-substituted tertiary amide. Eight Tb and Eu complexes were prepared. All had higher lanthanide luminescence quantum yields (ΦLn) than their secondary amide analogues; three Tb emitters had ΦTb > 40%. Eu complexes had ΦEu up to 11.6%. The antenna singlet and triplet excited states are slightly shifted, while the metal coordination sphere is unchanged by the introduction of the carboxymethyl group.

Graphical abstract: Highly luminescent lanthanide complexes sensitised by tertiary amide-linked carbostyril antennae

Supplementary files

Article information

Article type
Paper
Submitted
31 Mar 2018
Accepted
12 Jun 2018
First published
13 Jun 2018
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2018,47, 10702-10714

Highly luminescent lanthanide complexes sensitised by tertiary amide-linked carbostyril antennae

D. Kovacs, D. Phipps, A. Orthaber and K. E. Borbas, Dalton Trans., 2018, 47, 10702 DOI: 10.1039/C8DT01270A

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