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

Author(s):Show less -

Errulat, Dylan ^[1] ; Marin, Riccardo ^[1] ; Galico, Diogo A. ^{[2, 1]} ; Harriman, Katie L. M. ^[1] ; Pialat, Amelie ^[1] ; Gabidullin, Bulat ^[1] ; Iikawa, Fernando ^[3] ; Couto, Jr., Odilon D. D. ^[3] ; Moilanen, Jani O. ^[4] ; Hemmer, Eva ^[1] ; Sigoli, Fernando A. ^[2] ; Murugesu, Muralee ^[1]

Affiliation

^[1] Univ Ottawa, Dept Chem & Biomol Sci, Ottawa, ON K1N 6N5 - Canada

^[2] Univ Estadual Campinas, Inst Chem, UNICAMP, POB 6154, BR-13083970 Campinas, SP - Brazil

^[3] Univ Estadual Campinas, Inst Chem, Inst Phys Gleb Wataghin, POB 6165, BR-13083970 Campinas, SP - Brazil

^[4] Univ Jyvaskyla, Nanosci Ctr, Dept Chem, POB 35, FI-40014 Jyvaskyla - Finland

• Document type: Journal article
• Source: ACS CENTRAL SCIENCE; v. 5, n. 7, p. 1187-1198, JUL 24 2019.
• Web of Science Citations: 26

Abstract

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. (AU)

• FAPESP's process: 16/16365-6 - Nanostructures of III-V semiconductors and their optical properties
• Grantee: Fernando Iikawa
• Support type: Regular Research Grants
• FAPESP's process: 14/50906-9 - INCT 2014: in Functional Complex Materials
• Grantee: Fernando Galembeck
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 12/11382-9 - Optical modulation of semiconductor nanostructures using surface acoustic waves
• Grantee: Odilon Divino Damasceno Couto Júnior
• Support type: Research Grants - Young Investigators Grants
• FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
• Grantee: Lauro Tatsuo Kubota
• Support type: Research Projects - Thematic Grants