Synergistic weak/strong coupling luminescence in Eu-metal-organic framework/Zn2GeO4:Mn2+ nanocomposites for ratiometric luminescence thermometer. (October 2018)

• Record Type: Journal Article
• Authors: Zhang, Yuchi; Yao, Hanzhi; Xu, Yan; Xia, Zhiguo
• Is Part Of: Dyes and pigments. Volume 157(2018)
• Page Start: 321
• Page End: 327
• Publication Date: 2018-10
• Subjects: Nanocomposites -- Sensors -- Luminescence -- Thermometer; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2018.05.002
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: 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 Eu 3+ /Mn 2+ 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 Zn2 GeO4 :Mn 2+ with strong coupling effect. Specifically, the as-prepared nanocomposites composed of lanthanide MOF Eu-BTC (BTC = 1, 3, 5-benzenetricarboxylic acid) and Zn2 GeO4 :Mn 2+ nanorods possessed Eu 3+ /Mn 2+ dual red/green emission, which displays excellent ratiometric temperature-sensing functions and also has high relative sensitivity ( S r ) of 4.1% ºC −1 when they are used as ratiometric luminescent thermometer in the physiological temperatures (25–45 °C). These results demonstrate that such a design strategy with synergistic weak/strong coupling luminescence is useful and the as-obtained Eu-MOF/Zn2 GeO4 :Mn 2+ nanocomposites can be potential for temperature sensor applications. Graphical abstract: We reported a Eu 3+ /Mn 2+ dual-activator luminescent thermometer composed of Eu-metal-organic framework and Zn2 GeO4 :Mn 2+ nanocomposites exhibiting excellent self-calibrated luminescent response towards temperature change. Highlights: A dual-activator Eu 3+ /Mn 2+ luminescent thermometer nanocomposite is designed. The self-calibrated luminescent response towards temperature is investigated. The as-prepared nanocomposite displays high temperature sensitivity.