A Luminescent Thermometer Exhibiting Slow Relaxation of the Magnetization: Toward Self-Monitored Building Blocks for Next-Generation Optomagnetic Devices.

Autor: Errulat D; Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada., Marin R; Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada., Gálico DA; Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, Campinas, Sao Paulo 13083-970, Brazil., Harriman KLM; Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada., Pialat A; Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada., Gabidullin B; Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada., Iikawa F; Institute of Physics 'Gleb Wataghin', University of Campinas, UNICAMP, P.O. Box 6165, Campinas, Sao Paulo 13083-970, Brazil., Couto ODD Jr; Institute of Physics 'Gleb Wataghin', University of Campinas, UNICAMP, P.O. Box 6165, Campinas, Sao Paulo 13083-970, Brazil., Moilanen JO; Department of Chemistry, Nanoscience Centre, University of Jyväskylä, P.O. Box 35, Jyväskylä FI-40014, Finland., Hemmer E; Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada., Sigoli FA; Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, Campinas, Sao Paulo 13083-970, Brazil., Murugesu M; Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
Jazyk: angličtina
Zdroj: ACS central science [ACS Cent Sci] 2019 Jul 24; Vol. 5 (7), pp. 1187-1198. Date of Electronic Publication: 2019 May 22.
DOI: 10.1021/acscentsci.9b00288
Abstrakt: The development and integration of Single-Molecule Magnets (SMMs) into molecular electronic devices continue to be an exciting challenge. In such potential devices, heat generation due to the electric current is a critical issue that has to be considered upon device fabrication. To read out accurately the temperature at the submicrometer spatial range, new multifunctional SMMs need to be developed. Herein, we present the first self-calibrated molecular thermometer with SMM properties, which provides an elegant avenue to address these issues. The employment of 2,2'-bipyrimidine and 1,1,1-trifluoroacetylacetonate ligands results in a dinuclear compound, [Dy 2 (bpm)(tfaa) 6 ], which exhibits slow relaxation of the magnetization along with remarkable photoluminescent properties. This combination allows the gaining of fundamental insight in the electronic properties of the compound and investigation of optomagnetic cross-effects (Zeeman effect). Importantly, spectral variations stemming from two distinct thermal-dependent mechanisms taking place at the molecular level are used to perform luminescence thermometry over the 5-398 K temperature range. Overall, these properties make the proposed system a unique molecular luminescent thermometer bearing SMM properties, which preserves its temperature self-monitoring capability even under applied magnetic fields.
Competing Interests: The authors declare no competing financial interest.
Databáze: MEDLINE
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