Lanthanide Complexation of 2,6-Bis(5,6-dipyridyl-1,2,4-triazinyl)pyridine - Solvent- and Lanthanide-Ion-Controlled Ligand Coordination Mode and Denticity

Document Type

Article

Publication Date

1-1-2016

Publication Title

European Journal of Inorganic Chemistry

Volume

2016

Issue

6

First page number:

921

Last page number:

927

Abstract

2,6-Bis(5,6-dipyridyl-1,2,4-triazinyl)pyridine (PyBTP) is an interesting ligand owing to the possible variation of its coordination sites and denticity in complexation. Therefore, solution and solid-phase lanthanide complexations were studied with PyBTP in two solvents, viz., acetonitrile and methanol, through various spectroscopic and single-crystal X-ray diffraction techniques. The results from all of these studies consistently showed the interesting observation of solvent-dependent changes to the ligand coordination mode and denticity, which are reported for the first time for trivalent lanthanide (Ln3+) complexes. The ligand coordination is affected by the size of the lanthanide ion. This observation can provide clues for the development of intra-lanthanide and lanthanide-actinide separation methods through the exploitation of the variable complexing behaviour of a particular ligand. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

Coordination modes; Denticity; Lanthanides; N ligands; Solvent effects; Structure elucidation

Language

English

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