Journal
RSC ADVANCES
Volume 11, Issue 55, Pages 34735-34741Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ra06755a
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Funding
- RFBR [19-53-15008]
- University of Montpellier
- CNRS [PRC2287]
- European Union (European Regional Development Fund)
- FCT/MEC [UIDB/50011/2020, UIDP/50011/2020]
- FEDER under the PT2020 Partnership Agreement
- Ministry of Science and Higher Education of the Russian Federation
- RUDN University Strategic Academic Leadership Program
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The new luminescent cage-like tetranuclear silsesquioxanes exhibit a tunable thermosensitive Tb3+-to-Eu3+ energy transfer, making them suitable as temperature sensors operating in the range 41-100 degrees C with excellent linearity (R2 = 0.9990) and repeatability (>95%). The maximum relative sensitivity of 0.63% degrees C-1 is achieved at 68 degrees C, demonstrating their effective performance as thermometers.
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.
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