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Entrapment of phenol red (PR) pH indicator into sol–gel matrix in presence of some surfactants

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Abstract

Sol–gel entrapment method was used to entrap phenol red (PR) pH indicator into mesoporous silica materials, in presence of ethanediyl-1,2-bis (dimethyldodecylammonium bromide (Gemini 12-2-12), alkyl hydroxyethyl dimethyl ammonium chloride (HY, R = 12–14) and sodium dodecyl sulfate (SDS) surfactants. The use of surfactants has modified the morphology and porosity of silica host matrix for better sensing capabilities. The physical interactions of the different surfactants between PR molecules and host mesoporous silica network are well explained. The presence of SDS, Gemini 12-2-12 and HY surfactants has shifted pKa values of to less acidic and more basic in comparison with that of free PR and PR-entrapped silica system.

Graphical Abstract

Behavior of PR-entrapped porous silica in presence of Gemini 12-2-12.

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Acknowledgments

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, P O Box 1277, Gaza, Palestine

    Issa M. El-Nahhal, Fawzi S. Kodeh & Asma Al swearky

  2. Laboratoire de Chimie de la Matière Condensée de Paris, Université Piere Curie-Paris 6, CNRS, College de France, 11 place Marcelin Berthelot, 75231, Paris, France

    Jacques Livage

  3. University of Palestine, Gaza, Palestine

    Shehata M. Zourab

Authors
  1. Issa M. El-Nahhal
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  2. Jacques Livage
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  3. Shehata M. Zourab
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  4. Fawzi S. Kodeh
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  5. Asma Al swearky
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Correspondence to Issa M. El-Nahhal.

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El-Nahhal, I.M., Livage, J., Zourab, S.M. et al. Entrapment of phenol red (PR) pH indicator into sol–gel matrix in presence of some surfactants. J Sol-Gel Sci Technol 75, 313–322 (2015). https://doi.org/10.1007/s10971-015-3702-8

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  • DOI: https://doi.org/10.1007/s10971-015-3702-8

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