Oxygen-sensing materials based on [Ru(bpy)3] covalently grafted MSU-3 mesoporous molecular sieves |
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| Authors: | Haoran Zhang Bin Li Bingfu Lei |
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| Institution: | a Key Laboratory of Excited State Processes, Changchun Institute of Optics Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
b Faculty of Chemistry, Northeast Normal University, Changchun 130024, China |
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| Abstract: | Novel oxygen-sensing materials consisting of Ru(bpy)2(Bpy-Si)]2+ portions covalently grafted onto the backbone of MSU-3 mesostructured silica-based network were prepared in a two-step process with the help of P123 surfactant. The 2,2′-bipyridyl covalently grafted with 3-aminopropyltriethoxysilane was used not only as sol-gel precursor but also as the second ligand of the Ru(bpy)2Cl2·2H2O complex for the preparation of sol-gel-derived silicates for oxygen-sensing materials. The downward oxygen-sensing Stern-Volmer plots can be attributed to the heterogeneous environment of the luminophore within the MSU-3 silica. The MSU-3 sample obtained at 10 °C showed better oxygen-sensing performance due to its special morphology. |
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| Keywords: | Ruthenium complex Covalent grafting Oxygen sensor Mesoporous molecular sieves |
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