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

Autor(es):Mostrar menos -

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: ACS CENTRAL SCIENCE; v. 5, n. 7, p. 1187-1198, JUL 24 2019.
• Citações Web of Science: 3

Resumo

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)

• Processo FAPESP: 14/50906-9 - INCT 2014: em Materiais Complexos Funcionais (INOMAT)
• Beneficiário: Fernando Galembeck
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/16365-6 - Nanoestruturas de semicondutoras III-V e suas propriedades ópticas
• Beneficiário: Fernando Iikawa
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/22127-2 - Desenvolvimento de novos materiais estratégicos para dispositivos analíticos integrados
• Beneficiário: Lauro Tatsuo Kubota
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/11382-9 - Modulação ótica de sistemas nanoestruturados usando ondas acústicas de superfícies
• Beneficiário: Odilon Divino Damasceno Couto Júnior
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores