Journal
DYES AND PIGMENTS
Volume 157, Issue -, Pages 321-327Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2018.05.002
Keywords
Nanocomposites; Sensors; Luminescence; Thermometer
Funding
- National Natural Science Foundation of China [21771031, 21401018]
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Engineering novel ratiometric temperature sensors with high temperature sensitivity is still of a great challenge in versatile temperature measurement fields. Herein, a self-calibrated optical luminescent thermometer based on Eu3+ /Mn2+ dual-activator was fabricated in the same nanocomposite system, which integrated the photoluminescence originated from the temperature-insensitive Eu-metal organic framework with weak coupling effect and the temperature-sensitive Zn2GeO4:Mn2+ with strong coupling effect. Specifically, the as-prepared nanocomposites composed of lanthanide MOF Eu-BTC (BTC = 1,3,5-benzenetricarboxylic acid) and Zn2GeO4:Mn2+ nanorods possessed Eu3+ /Mn2+ dual red/green emission, which displays excellent ratiometric temperature-sensing functions and also has high relative sensitivity (S-r) of 4.1% C-Q(-1) when they are used as ratiometric luminescent thermometer in the physiological temperatures (25-45 degrees C). These results demonstrate that such a design strategy with synergistic weak/strong coupling luminescence is useful and the as -obtained Eu-MOF/Zn2GeO4:Mn2+ nanocomposites can be potential for temperature sensor applications.
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