resumo
New luminescent cage-like tetranuclear silsesquioxanes [NEt4][(Ph4Si4O8)(2)(Tb3Eu)(NO3)(4)(OH)(EtOH)(3)(H2O)]center dot 4(EtOH) (1) and [NEt4](2)[(Ph4Si4O8)(2)(Tb2Eu2)(NO3)(6)(EtOH)(2)(MeCN)(2)]center dot 4(MeCN) (2) present a tunable thermosensitive Tb3+-to-Eu3+ energy transfer driven by Tb3+ and Eu3+ emission and may be used as temperature sensors operating in the range 41-100 degrees C with excellent linearity (R-2 = 0.9990) and repeatability (>95%). The thermometer performance was evidenced by the maximum relative sensitivity of 0.63% degrees C-1 achieved at 68 degrees C.
palavras-chave
ELECTRONIC-ENERGY LEVELS; LANTHANIDE AQUO IONS; PHOTOLUMINESCENCE PROPERTIES; COORDINATION POLYMERS; LUMINESCENT; THERMOMETRY; EUROPIUM; TERBIUM
categoria
Chemistry, Multidisciplinary
autores
Nigoghossian, K; Kulakova, AN; Felix, G; Khrustalev, VN; Shubina, ES; Long, J; Guari, Y; Sene, S; Carlos, LD; Bilyachenko, AN; Larionova, J
nossos autores
Luís Carlos
Professor Catedráticoagradecimentos
This work was supported by the RFBR (project 19-53-15008). J. La., K. N., G. F., Y. G. and J. Lo. thank the University of Montpellier and CNRS for financial support (project PRC2287 Premium 2019-2021), as well as for the project MAGCELL which was co-financed by the European Union (European Regional Development Fund) as part of the support of interdisciplinary or innovative research projects in S3 fields of the Occitanie region. The work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by Portuguese funds through the FCT/MEC and, when appropriate, co-financed by FEDER under the PT2020 Partnership Agreement. Authors are grateful to Platform of Analysis and Characterization (PAC) of ICGM for magnetic and X-Ray diffraction measurements. J. La. and A. N. K. are grateful for Vernadski program (Embassy of France in Russian Federation). Elemental analyses were performed with the financial support from the Ministry of Science and Higher Education of the Russian Federation and using the equipment of the Center for Molecular Composition Studies of INEOS RAS. This paper was supported in part by the RUDN University Strategic Academic Leadership Program (A. N. K., A. N. B. and V. N. K.).