Spectroscopic study of sulforhodamine 640-doped sol-gel silica |
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Authors: | Haider Abbas KP Tiwary LSS Singh Mohd Zulfequar ZH Zaidi M Husain |
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Institution: | Department of Physics, Jamia Millia Islamia (Central University), New Delhi - 110025, India |
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Abstract: | The sol-gel process is a technique which provides a low-temperature route for the preparation of organic dye-doped porous silica glass. Extended UV transmission was observed for HCl-catalysed sol-gel silica. Properties of a solute may differ greatly between a free solution and that solution confined in pores of a sol-gel glass. Absorption and fluorescence properties of sulforhodamine 640-doped silica samples prepared by sol-gel process were investigated. In the TEOS-derived gel, the emission of the dye does not shift during aging but exhibits a large change during drying. The emission maximum of sulforhodamine 640 blue shifts was discussed as a function of increasing rigidity of the surrounding matrix. |
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Keywords: | Sulforhodamine 640 Sol-gel silica |
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