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Permeability of micelles in surfactant-containing MCM-41 silica as monitored by embedded dye molecules
Journal article published in 2001 by
Barbara Onida,
L. Flora,
Barbara Bonelli 
,
Edoardo Garrone,
Francesco Geobaldo,
C. O. Arean
,
Edoardo Garrone,
Francesco Geobaldo,
C. O. Arean
Abstract
Mesoporosu (MCM-41 type) silica containing surfactant-embedded Congo Red has been prepared and tested against gas phase HCl and ammonia, as well as solutions of ionic species; it is shown that the hybrid (organic-inorganic) material is permeable to both gases and ionic species, and can act as a pH indicator and as a selective chelating agent.