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Photoluminescence analysis for terbium β-diketonate complex-based silica xerogel matrices

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Abstract

In this work, luminescent complex, terbium (III) β-diketonate (C24H16F9O8S3Tb), was prepared and incorporated into silica matrix by ordinary sol–gel method. The starting precursor which provide silica matrices was tetraethyl orthosilicate (SiOC2H5)4. The experimental conditions have been adopted, so that the sample formation via sol–gel route was started at neutral pH, whereas the final pH value was normalized to three before reaching gel point. The spectroscopic analysis of terbium β-diketonate complexes-based xerogel matrices as a function of Tb+3 concentrations has been realized using UV–visible absorption, (FTIR) spectroscopy and luminescence measurement. The luminescence behavior of Tb3+ ions can be improved in such matrices. The complex can be incorporated into the silica matrix at the same time as the hydrolysis and condensation reaction of the silanes start. The green emission of Tb3+ ions at 544 nm was clearly observed and indicates the good stability of Tb complex in silica sol–gel matrices.

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Acknowledgments

Authors would like to thank Dr. Oday A. Hammadi at Al-Iraqia University (Baghdad) for his valuable assistance in preparation and correspondences of the manuscript.

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Authors and Affiliations

  1. Department of Physics, College of Science, University of Baghdad, Baghdad, Iraq

    Firas J. Kadhim, Wesam A. A. Twej, Tawfiq S. Mahdi & Adel J. Majeed

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  1. Firas J. Kadhim
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  2. Wesam A. A. Twej
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  3. Tawfiq S. Mahdi
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  4. Adel J. Majeed
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Correspondence to Firas J. Kadhim.

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Kadhim, F.J., Twej, W.A.A., Mahdi, T.S. et al. Photoluminescence analysis for terbium β-diketonate complex-based silica xerogel matrices. J Sol-Gel Sci Technol 76, 150–155 (2015). https://doi.org/10.1007/s10971-015-3761-x

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  • DOI: https://doi.org/10.1007/s10971-015-3761-x

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