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Near-infrared luminescence and magnetic properties of dinuclear rare earth complexes modulated by β-diketone co-ligand

Abstract

Seven phenoxo–O and carbonyl–O bridged dinuclear rare earth complexes have been assembled utilizing the 3-methoxysalicylaldehyde-2-aminobenzoylhydrazone (H2L) and three β-diketone ligands (Hdbm = 1,3-diphenyl-1,3-propanedione, Hacac = acetylacetone, Hbeac = 1-phenyl-1,3-butanedione): [RE2L(HL)(acac)3]·3CH3CH2OH (RE(III) = Eu (1), Tb (2), Dy (3), Ho (4), Er (5)), [Yb2L2(dbm)2(CH3OH)2]·CH3OH (6), [Dy2L(HL)(beac)3] (7). Complexes 5 and 6 exhibit the characteristic emission peaks of the corresponding Er3+ and Yb3+ ions, respectively. The studies on magnetic properties for complexes reveal that complexes 3 and 7 exhibit slow magnetic relaxation behavior, typical of SMM behavior, resulting in the energy barrier of 140 K for 3 and 75 K for 7. Meanwhile, this research demonstrates that the magnetic properties can be modulated by subtle changes in the coordination environment resulting from changes in the co-ligand substituents.

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Supplementary files

Article information


Accepted
28 Jan 2020
First published
29 Jan 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Near-infrared luminescence and magnetic properties of dinuclear rare earth complexes modulated by β-diketone co-ligand

L. Li, J. Gou, D. Wu, Y. Wang, Y. Duan, H. Chen, H. Gao and J. Cui, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ00164C

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