Issue 36, 2023

Single molecule magnet features in luminescent lanthanide coordination polymers with heptacoordinate Dy/Yb(iii) ions as nodes

Abstract

Two sets of 1D/2D lanthanide coordination polymers with formulas of Ln(oqa)3·2H2O [Hoqa = 2-(4-oxoquinolin-1(4H)-yl) acetic acid, Ln = Dy (1), Yb (2)] and Ln(oaa)2(HCOO)(H2O) [Hoaa = 2-(9-oxoacridin-10(9H)-yl) acetic acid, Ln = Dy (3), Yb (4)] have been synthesized and their physical properties were investigated. All four complexes are constructed from seven-coordinate lanthanide ions and corresponding organic linkers. The lanthanide ions in 1 and 2 adopt a pentagonal bipyramid coordination geometry, whereas the coordination geometry of lanthanide ions in 3 and 4 can be described as a capped octahedron. Slow magnetic relaxation behaviors were observed in these four products at a zero/non-zero static magnetic field. Complexes 1, 2 and 4 exhibit the characteristic emission of Ln(III) ions, whereas complex 3 shows ligand-based emission. Bright yellow light emission was also observed when a voltage was applied, demonstrating the potential of 1 for application in light-emitting diodes (LEDs). Compounds 3 and 4 are the first examples of lanthanide complexes based on Hoaa ligands.

Graphical abstract: Single molecule magnet features in luminescent lanthanide coordination polymers with heptacoordinate Dy/Yb(iii) ions as nodes

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
05 Jul 2023
Accepted
11 Aug 2023
First published
11 Aug 2023

Dalton Trans., 2023,52, 12686-12694

Single molecule magnet features in luminescent lanthanide coordination polymers with heptacoordinate Dy/Yb(III) ions as nodes

X. Dong, M. Yu, Y. Peng, G. Zhou, G. Peng and X. Ren, Dalton Trans., 2023, 52, 12686 DOI: 10.1039/D3DT02106H

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