Issue 46, 2018

The lanthanide complexes of 2,2′-bipyridyl-6,6′-dicarboxylic dimethylanilides: the influence of a secondary coordination sphere on the stability, structure, luminescence and f-element extraction

Abstract

Four of the six possible isomeric 2,2′-bipyridyl-6,6′-dicarboxylic dimethylanilides were studied from the point of view of the impact of a secondary coordination sphere on the formation of complexes with lanthanides in solution, as well as the crystal structure and photophysical properties of the complexes. All ligands form complexes with a 1 : 1 metal-to-ligand ratio with an lg β1 in the range of 6.0–8.8, and strong correlations between secondary coordination sphere modulation and stability of the complexes within the lanthanide series. Although substitution at the o-position of the aromatic ring leads to significant elongation of M–OL bonds in a crystal, this significantly affects the stability of the complexes. The luminescence of the complexes is the most effective for europium complexes. From luminescence measurements of gadolinium complexes, the triplet energy levels of ligands were located as follows: o-methylated ligands show 10% higher levels than other isomers. Also, o-methylation of the phenyl ring increases the lifetime value while m-methylation reduces this value.

Graphical abstract: The lanthanide complexes of 2,2′-bipyridyl-6,6′-dicarboxylic dimethylanilides: the influence of a secondary coordination sphere on the stability, structure, luminescence and f-element extraction

Supplementary files

Article information

Article type
Paper
Submitted
15 sen 2018
Accepted
01 noy 2018
First published
01 noy 2018

Dalton Trans., 2018,47, 16755-16765

The lanthanide complexes of 2,2′-bipyridyl-6,6′-dicarboxylic dimethylanilides: the influence of a secondary coordination sphere on the stability, structure, luminescence and f-element extraction

N. E. Borisova, T. B. Sumyanova, A. V. Kharcheva, P. I. Matveev, A. V. Ivanov, E. A. Razumova and S. V. Patsaeva, Dalton Trans., 2018, 47, 16755 DOI: 10.1039/C8DT03734E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements