Synthesis and characterisation of new tripodal lanthanide complexes and investigation of their optical and magnetic properties

Craze, Alexander R, Huang, Xin-Da, Etchells, Isaac, Zheng, Li-Min, Bhadbhade, Mohan M, Marjo, Christopher E, Clegg, Jack K, Moore, Evan G, Avdeev, Maxim, Lindoy, Leonard F and Li, Feng (2017) Synthesis and characterisation of new tripodal lanthanide complexes and investigation of their optical and magnetic properties. Dalton transactions (Cambridge, England : 2003), 46 36: 12177-12184. doi:10.1039/c7dt02556d


Author Craze, Alexander R
Huang, Xin-Da
Etchells, Isaac
Zheng, Li-Min
Bhadbhade, Mohan M
Marjo, Christopher E
Clegg, Jack K
Moore, Evan G
Avdeev, Maxim
Lindoy, Leonard F
Li, Feng
Title Synthesis and characterisation of new tripodal lanthanide complexes and investigation of their optical and magnetic properties
Journal name Dalton transactions (Cambridge, England : 2003)   Check publisher's open access policy
ISSN 1477-9234
Publication date 2017-09-28
Year available 2017
Sub-type Article (original research)
DOI 10.1039/c7dt02556d
Open Access Status Not yet assessed
Volume 46
Issue 36
Start page 12177
End page 12184
Total pages 8
Place of publication CAMBRIDGE
Publisher ROYAL SOC CHEMISTRY
Language eng
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.
Keyword Improved Relaxation Efficiency
Single-Molecule Magnets
Schiff-Base Ligands
Mri Contrast Agents
Structural-Characterization
Metal-Complexes
Ion Magnets
Solid-State
Rare-Earth
Heptadentate
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Pubmed Import
 
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Created: Wed, 15 Nov 2017, 13:47:30 EST