Luminescent properties of encapsulation of europium complex into meso-structured silica monoliths |
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| Authors: | Yu Chen Li Song Feng-zhen Hou |
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| Institution: | a Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
b Department of Inorganic Materials, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: | Meso-structured silica monoliths using PEG (PEG=polyethylene glycol) as a low-cost template and synthesized via sol-gel methods were used as host materials for incorporation of europium complexes Eu(BA)3Phen (BA=benzoic acid and Phen=1,10-phenanthroline). The meso-structured silica was silylated by 3-aminopropyltriethoxysilane (APTES) or 3-glycidoxypropyltrimethoxysilane (GPTMS) before wet impregnation. Samples were characterized by BET, diffuse reflectance (DR) spectroscopy, infrared spectroscopy and fluorescence measurements. The results showed that the emission quantum efficiency of GPTMS silylated meso-structured silica with larger pore size was up to 44.6%. Also, the lifetime measurement showed the complex encapsulated in this rigid matrix had longer lifetime than the pure complex in solid or liquid. |
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| Keywords: | Sol-gel Meso-structured Monolith Emission quantum efficiency Lifetime |
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