Water‐Stable Lanthanide Coordination Polymers with Triple Luminescent Centers for Tunable Emission and Efficient Self‐Calibration Sensing Wastewater Pollutants

Advanced Optical Materials - Tập 8 Số 8 - 2020
Enjun Gao1,2, Shuangyan Wu2, Jing Wang2, Mingchang Zhu2, Ying Zhang2, Vladimir P. Fedin3
1School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, 114051 P. R. China
2The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, 11th Street, Shenyang Economic and Technological Development Zone, Shenyang, Liaoning, 110142 P. R. China
3Nikolaev Institute of Inorganic Chemistry, Lavrentiev Avenue 3, Novosibirsk, 630090 Russia

Tóm tắt

AbstractConventional luminescent sensors relying on single emission responsive to analytes demonstrate limited sensitivity and selectivity and developing novel self‐calibration probes is highly required. A series of water‐stable coordination polymers (CPs) with three emitting centers for tunable emissions is reported. They are facilely synthesized by simultaneously doping red‐emitting Eu3+ and green‐emitting Tb3+ into the same framework. The versatile Eu0.67Tb0.33–CP is applied to conveniently distinguishing different nitroaromatics pollutants and multidimensional ratiometric sensing CrO42−/Cr2O72−. Specific nitroaromatics can cause unique changes to the ligand→Eu3+/Tb3+ energy transfer efficiency, while CrO42−/Cr2O72− intriguingly quench the three emissions at different rates. Each nitroaromatic exhibits notably correlation to a unique combination of the two ligand→Eu3+/Tb3+ emission intensity ratios, enabling a 2D fingerprint recognition. Furthermore, the concentration‐dependent evolution of the two ratios upon exposure to CrO42−/Cr2O72− can be mapped out, achieving a 3D code recognition. As a result, the sensor demonstrates selective recognition of 4‐nitrophenol and CrO42−/Cr2O72− with high sensitivity and selectivity as well as great recycling ability. Both the synthetic and sensing strategies present a promising strategy to develop facile and effective ratiometric sensors.

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Advanced Optical Materials

Tập 8 Số 8

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