Single-Ion Magnetism in a Luminescent Er3+ β-Diketonato Complex with Multiple Relaxation Mechanisms

In the crystal structure of tris(2,2,6,6‐tetramethyl‐3,5‐heptanedionato)mono(bathophenanthroline)erbium(III), C57H73ErN2O6, the Er3+ ion is in an antiprismatic environment, surrounded by two N atoms and six O atoms. The β‐diketonato ligands show structural disorder. The ac susceptibility studies con...

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Published in:European journal of inorganic chemistry Vol. 2014; no. 3; pp. 511 - 517
Main Authors: Martín-Ramos, Pablo, Ramos Silva, Manuela, Coutinho, Joana T., Pereira, Laura C. J., Chamorro-Posada, Pedro, Martín-Gil, Jesús
Format: Journal Article
Language:English
Published: Weinheim WILEY-VCH Verlag 01.01.2014
WILEY‐VCH Verlag
Wiley Subscription Services, Inc
Subjects:
Crystal structure
Erbium
Inorganic chemistry
Lanthanides
Luminescence
Magnetic induction
Magnetic properties
Magnetic relaxation
Single-ion magnets
β-Diketonates
ISSN:1434-1948, 1099-0682
Online Access:Get full text
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Summary:In the crystal structure of tris(2,2,6,6‐tetramethyl‐3,5‐heptanedionato)mono(bathophenanthroline)erbium(III), C57H73ErN2O6, the Er3+ ion is in an antiprismatic environment, surrounded by two N atoms and six O atoms. The β‐diketonato ligands show structural disorder. The ac susceptibility studies conducted at frequencies from 33 to 9995 Hz and at temperatures from 1.7 to 10 K revealed that the application of a static magnetic field induces a slow magnetic relaxation. Two relaxation modes (fast relaxation = FR; slow relaxation = SR) could be distinguished with energy barriers UFR/kB = 15.6 K and USR/kB = 22.4 K and relaxation times of 10–6 and 10–4 s, respectively. The Er3+ compound is luminescent in the solid state, emitting in the near IR region. A new Er3+ β‐diketonato compound is presented. In the presence of a variable magnetic field, this compound undergoes a dual relaxation process with distinct energy barriers and relaxation times. Furthermore, the compound absorbs radiation in the visible and UV region and emits in the near IR region.
Bibliography:istex:1BD85AA16533E91FFE1617456E7E4D3AE7841EAB
ark:/67375/WNG-31CLJ5W2-T
ArticleID:EJIC201301076
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.201301076