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A Multifunctional Dual-Luminescent Polyoxometalate@Metal-Organic Framework EuW10@UiO-67 Composite as Chemical Probe and Temperature Sensor

Abstract : The luminescent [EuW10O36]9− polyoxometalate has been introduced into the cavities of the highly porous zirconium luminescent metal-organic framework UiO-67 via a direct synthesis approach, affording the EuW10@UiO-67 hybrid. Using a combination of techniques (TGA, BET, elemental analysis, EDX mapping,…) this new material has been fully characterized, evidencing that it contains only 0.25% in europium and that the polyoxometalate units are located inside the octahedral cavities and not at the surface of the UiO-67 crystallites. Despite the low amount of europium, it is shown that EuW10@UiO-67 acts as a solid-state luminescent sensor for the detection of amino-acids, the growth of the emission intensity globally following the growth of the amino-acid pKa. In addition, EuW10@UiO-67 acts as a sensor for the detection ofmetallic cations, with a high sensitivity for Fe3+. Noticeably, the recyclability of the reported material has been established. Finally, it is shown that the dual-luminescent EuW10@UiO-67 material behave as a self-calibrated-ratiometric thermometer in the physiological range.
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https://hal.archives-ouvertes.fr/hal-02572116
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Submitted on : Wednesday, May 13, 2020 - 2:43:55 PM
Last modification on : Thursday, January 7, 2021 - 4:36:04 PM

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William Salomon, Anne Dolbecq, Catherine Roch-Marchal, Grégoire Paille, Remi Dessapt, et al.. A Multifunctional Dual-Luminescent Polyoxometalate@Metal-Organic Framework EuW10@UiO-67 Composite as Chemical Probe and Temperature Sensor. Frontiers in Chemistry, Frontiers, 2018, 6, ⟨10.3389/fchem.2018.00425⟩. ⟨hal-02572116⟩

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