Luminescent thermometer based on Eu3+/Tb3+‐organic‐functionalized mesoporous silica |
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| Authors: | Anna M. Kaczmarek Dolores Esquivel Brecht Laforce Laszlo Vincze Pascal Van Der Voort Francisco J. Romero‐Salguero Rik Van Deun |
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| Affiliation: | 1. L3 – Luminescent Lanthanide Lab, Department of Chemistry, Ghent University, Ghent, Belgium;2. Departamento de Quimica Organica, Instituto Universitario de Investigacion en Quimica Fina y Nanoquimica IUIQFN, Facultad de Ciencias, Universidad de Córdoba, Córdoba, Spain;3. XMI group, Department of Chemistry, Ghent University, Ghent, Belgium;4. COMOC, Department of Chemistry, Ghent University, Ghent, Belgium |
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| Abstract: | In this work we investigate a mesoporous silica (MS) decorated with dipyridyl‐pyridazine (dppz) ligands and further grafted with a mixture of Eu3+/Tb3+ ions (28.45%:71.55%), which was investigated as a potential thermometer in the 10–360 K temperature range. The MS material was prepared employing a hetero Diels–Alder reaction: 3,6‐di(2‐pyridyl)‐1,2,4,5‐tetrazine was reacted with the double bonds of vinyl‐silica (vSilica) followed by an oxidation procedure. We explore using the dppz‐vSilica material to obtain visible emitting luminescent materials and for obtaining a luminescent thermometer when grafted with Eu3+/Tb3+ ions. For the dppz‐vSilica@Eu,Tb material absolute sensitivity Sa of 0.011 K?1 (210 K) and relative sensitivity Sr of 1.32 %K?1 (260 K) were calculated showing good sensing capability of the material. Upon temperature change from 10 K to 360 K the emission color of the material changed gradually from yellow to red. |
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| Keywords: | organic‐functionalized silica ratiometric sensors temperature sensors |
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