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Title: Synthesis and characterisation of new tripodal lanthanide complexes and investigation of their optical and magnetic properties
Authors: Craze, AR
Huang, XD
Etchells, I
Zheng, LM
Bhadbhade, MM
Marjo, CE
Clegg, JK
Moore, EG
Avdeev, M
Lindoy, LF
Li, F
Keywords: Rare earths
Magnetic properties
X-ray diffraction
Issue Date: 21-Aug-2017
Publisher: Royal Society of Chemistry
Citation: Craze, A. R., Huang, X. -D., Etchells, I., Zheng, L. -M., Bhadbhade, M. M., Marjo, C. E., Clegg, J. K., Moore, E. G., Avdeev, M., Lindoy, L. F., & Li, F. (2017). Synthesis and characterisation of new tripodal lanthanide complexes and investigation of their optical and magnetic properties. Dalton Transactions, 46(36), 12177-12184. doi:10.1039/C7DT02556D
Abstract: This paper presents the synthesis of a tripodal ligand (H3L) via the Schiff base condensation of N,N-diethylsalicylaldehyde and tris(2-aminoethyl)amine. The neutral complexes of type [EuL], [GdL] and [DyL] were synthesized and characterized by FT-IR, SEM-EDS, PXRD, single crystal X-ray diffraction, CHN analysis and high resolution ESI-MS. X-ray crystallographic studies demonstrated that the heptadentate ligand incorporating a cavity pre-organized by hydrogen bonding binds the Ln(III) ions to yield a face capped octahedral coordination geometry with three-fold symmetry. Photoluminescence studies show a typical Ln(III) absorption character for the three complexes, with [EuL] demonstrating considerably stronger lanthanide-based luminescence peaks, and a Eu(III) centered luminescence lifetime of 0.144 ± 0.01 ms. Temperature/field-dependent DC and temperature/frequency-dependent AC magnetic measurements carried out for the Dy(III) complex indicated obvious magnetic anisotropy and suggested slow relaxation behaviour with considerable quantum tunnelling of the magnetization contribution. © The Royal Society of Chemistry 2017
ISSN: 1477-9234
Appears in Collections:Journal Articles

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