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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Triplet-State Position and Crystal-Field Tuning in Opto-Magnetic Lanthanide Complexes: Two Sides of the Same Coin

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Author(s):
Galico, Diogo A. [1, 2] ; Marin, Riccardo [2] ; Brunet, Gabriel [2] ; Errulat, Dylan [2] ; Hemmer, Eva [2] ; Sigoli, Fernando A. [1] ; Moilanen, Jani O. [3] ; Murugesu, Muralee [2]
Total Authors: 8
Affiliation:
[1] Univ Estadual Campinas, UNICAMP, Inst Chem, POB 6154, BR-13083970 Campinas, SP - Brazil
[2] Univ Ottawa, Dept Chem & Biomol Sci, Ottawa, ON K1N 6N5 - Canada
[3] Univ Jyvaskyla, Nanosci Ctr, Dept Chem, POB 35, Jyvaskyla 40014 - Finland
Total Affiliations: 3
Document type: Journal article
Source: CHEMISTRY-A EUROPEAN JOURNAL; v. 25, n. 64, p. 14625-14637, NOV 18 2019.
Web of Science Citations: 9
Abstract

Lanthanide-complex-based luminescence thermometry and single-molecule magnetism are two effervescent fields of research, owing to the great promise they hold from an application standpoint. The high thermal sensitivity achievable, their contactless nature, along with sub-micrometric spatial resolution make these luminescent thermometers appealing for accurate temperature probing in miniaturised electronics. To that end, single-molecule magnets (SMMs) are expected to revolutionise the field of spintronics, thanks to the improvements made in terms of their working temperature-now surpassing that of liquid nitrogen-and manipulation of their spin state. Hence, the combination of such opto-magnetic properties in a single molecule is desirable in the aim of overcoming, among others, addressability issues. Yet, improvements must be made through design strategies for the realisation of the aforementioned goal. Moving forward from these considerations, we present a thorough investigation of the effect that changes in the ligand scaffold of a family of terbium complexes have on their performance as luminescent thermometers and SMMs. In particular, an increased number of electron-withdrawing groups yields modifications of the metal coordination environment and a lowering of the triplet state of the ligands. These effects are tightly intertwined, thus, resulting in concomitant variations of the SMM and the luminescence thermometry behaviour of the complexes. Supported by ab initio calculations, we can rationally interpret the observed trends and provide solid foundations for the development of opto-magnetic lanthanide complexes. (AU)

FAPESP's process: 14/50906-9 - INCT 2014: in Functional Complex Materials
Grantee:Fernando Galembeck
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
Grantee:Lauro Tatsuo Kubota
Support Opportunities: Research Projects - Thematic Grants