The Lanthanide Complexes of 2,2’-Bipyridyl-6,6’-dicarboxylic Dimethylanilides: the Influence of Secondary Coordination Sphere on the Stability, Structure, Luminescence and f-Elements Extraction

Borisova, N.E.; Tsagana, S.; Kharcheva, A.V.; Matveev, P.I.; Ivanov, A.V.; Razumova, E.A.; Svetlana, P.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.

Авторы: Borisova Nataliya E., Tsagana Sumyanova, Kharcheva Anastasia V., Matveev Petr I., Ivanov Alexey V., Razumova Elizaveta A., Svetlana Patsaeva
Журнал: Dalton Transactions
Том: 47
Номер: 46
Год издания: 2018
Издательство: Royal Society of Chemistry
Местоположение издательства: United Kingdom
Первая страница: 16755
Последняя страница: 16765
DOI: 10.1039/C8DT03734E
Аннотация: 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 crystal structure and photophysical properties of the complexes. All ligands form complexes with a 1:1 metal-to-ligand ratio with an lgβ1 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 the 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.
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The Lanthanide Complexes of 2,2’-Bipyridyl-6,6’-dicarboxylic Dimethylanilides: the Influence of Secondary Coordination Sphere on the Stability, Structure, Luminescence and f-Elements Extractionстатья

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