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Sol–Gel Encapsulation of Thymol Blue in Presence of Some Surfactants

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Abstract

Transparent monolithic discs were obtained in presence of different surfactants: sodium dodecyl sulfate (SDS), ethanediyl-1,2-bis (dimethyldodecylammonium bromide (Gemini 12-2-12) or alkyl hydroxyethyl dimethyl ammonium chloride (HY). The use of surfactants has modified the morphology and porosity of the silica host matrix for better sensing properties. The entrapment of TB into silica matrix has shifted pKa value to more basic and less acidic. The presence of Gemini 12-2-12 and HY surfactants has shifted pKa value to more acidic, whereas SDS has shifted pKa to more basic in comparison with that of entrapped TB/silica.

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Acknowledgements

The authors would like to thank the Chemistry Department at Al-Azhar University of Gaza for its generous support.

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Authors and Affiliations

  1. Department of Chemistry, Al-Azhar University, Jamal Abdel Nasser St., P.O. Box 1277, Gaza, Palestine

    Fawzi S. Kodeh & Issa M. El-Nahhal

  2. Department of Chemistry, Al-Azhar University, Cairo, Egypt

    Fatma H. Abd el-salam

Authors
  1. Fawzi S. Kodeh
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  2. Issa M. El-Nahhal
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  3. Fatma H. Abd el-salam
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Correspondence to Fawzi S. Kodeh.

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Kodeh, F.S., El-Nahhal, I.M. & Abd el-salam, F.H. Sol–Gel Encapsulation of Thymol Blue in Presence of Some Surfactants. Chemistry Africa 2, 67–76 (2019). https://doi.org/10.1007/s42250-018-00039-6

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  • DOI: https://doi.org/10.1007/s42250-018-00039-6

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