resumo
Luminescent thermometry allows the remote detection of the temperature and holds great potential in future technological applications in which conventional systems could not operate. Complementary approaches to measuring the temperature aiming to enhance the thermal sensitivity would however represent a decisive step forward. For the first time, we demonstrate the proof-of-concept that luminescence thermometry could be associated with a complementary temperature readout related to a different property. Namely, we propose to take advantage of the temperature dependence of both magnetic (canonical susceptibility and relaxation time) and luminescence features (emission intensity) found in Single-Molecule Magnets (SMM) to develop original dual magneto-optical molecular thermometers to conciliate high-performance SMM and Boltzmann-type luminescence thermometry. We highlight this integrative approach to concurrent luminescent and magnetic thermometry using an air-stable benchmark SMM [Dy(bbpen)Cl] (H(2)bbpen=N,N & PRIME;-bis(2-hydroxybenzyl)-N,N & PRIME;-bis(2-methylpyridyl)ethyl-enediamine)) exhibiting Dy3+ luminescence. The synergy between multiparametric magneto-optical readouts and multiple linear regression makes possible a 10-fold improvement in the relative thermal sensitivity of the thermometer over the whole temperature range, compared with the values obtained with the single optical or magnetic devices.
palavras-chave
EMISSION; MAGNETIZATION; LANTHANIDES; PERFORMANCE; RELAXATION; STRATEGIES
categoria
Chemistry
autores
Zanella, S; Aragon-Alberti, M; Brite, CDS; Salles, F; Carlos, LD; Long, JRM
nossos autores
Carlos Brites
Professor associado
Luís Carlos
Professor CatedráticoProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
The authors thank the University of Montpellier, CNRS and PAC of ICGM. J. L. also acknowledges the support from the Institut Universitaire de France. This work has been supported by ANR with grant number ANR-19-CE07-0026-01. The France/Portugal bilateral actions Campus France/FCT PESSOA (47823YE) and CNRS International Emerging Action are also acknowledged. This work was also developed within the scope of the projects CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by Portuguese funds through the FCT/MEC (PIDDAC), The Shape of Water (PTDC/NAN-PRO/3881/2020) and LogicALL (PTDC/CTM-CTM/0298/2020). SZ also acknowledges FCT for a PhD grant (SFRH/BD/144239/2019). We thank the reviewers whose suggestions helped to greatly improve the manuscript.