Issue 30, 2021

The effect of terminal N-donor aromatic ligands on the sensitization and emission of lanthanide ions in Zn2Ln (Ln = Eu, Tb) complexes with 4-biphenylcarboxylate anions

Abstract

The systematic series of Zn–Ln trinuclear carboxylate molecular complexes of general formula [Zn2Ln(NO3)(phbz)6(L)2] (Ln = Eu, Gd, and Tb, where phbz is the anion of 4-biphenylcarboxylic acid, and L is pyridine, 2,3-lutidine or 2,2′-bipyridine) were synthesized. It was found that [Zn2Eu(NO3)(phbz)6(py)2] can be obtained in two phases, crystallized in the triclinic P[1 with combining macron] and monoclinic P21/n space groups, and solvated acetonitrile molecules are able to prevent the formation of intermolecular π–π stacking interactions between the aromatic fragments of [Zn2Eu(NO3)(phbz)6(py)2]. Heterometallic Zn2Eu and Zn2Tb compounds possess bright metal-centered luminescence with quantum yields up to 62%. The influence of an N-donor ligand type on the efficiency of luminescence sensitization was studied.

Graphical abstract: The effect of terminal N-donor aromatic ligands on the sensitization and emission of lanthanide ions in Zn2Ln (Ln = Eu, Tb) complexes with 4-biphenylcarboxylate anions

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
08 Dec 2020
Accepted
15 Jun 2021
First published
17 Jun 2021

New J. Chem., 2021,45, 13349-13359

The effect of terminal N-donor aromatic ligands on the sensitization and emission of lanthanide ions in Zn2Ln (Ln = Eu, Tb) complexes with 4-biphenylcarboxylate anions

S. N. Melnikov, I. S. Evstifeev, S. A. Nikolaveskii, I. V. Ananyev, E. A. Varaksina, I. V. Taydakov, A. S. Goloveshkin, A. A. Sidorov, M. A. Kiskin and I. L. Eremenko, New J. Chem., 2021, 45, 13349 DOI: 10.1039/D0NJ05994C

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