[pH sensors based on rubbery ormosils preparation and their spectrum studies].

Area of Science:

• Materials Science
• Analytical Chemistry
• Organic Chemistry

Context:

• Development of novel sol-gel materials for chemical sensing applications.
• Need for stable and reliable matrices for immobilizing indicator dyes.
• Exploration of methyl-substituted ormosils as advanced materials.

Purpose:

• To describe a new methyl-substituted ormosil matrix for immobilizing bromophenol blue (BPhB) and bromocresol green (BCG).
• To investigate the influence of polymerization conditions on the photochemical properties of BPhB and BCG within the ormosil matrix.
• To prepare and characterize pH sensing films using these immobilized dyes.

Summary:

• A novel methyl-substituted ormosil material was synthesized, exhibiting properties of both TEOS sol-gel materials (organic solvent solubility) and sol-gel glasses (transparency, porosity, mechanical stability).
• The study examined how polymerization conditions affect the photochemical behavior of BPhB and BCG dyes within this matrix.
• pH sensing films were successfully prepared by immobilizing bromothymol blue and bromocresol green, with discussions on dye leaching, response times, spectral properties, and immobilization efficiency.

Impact:

• Provides a robust and versatile sol-gel matrix for developing advanced optical chemical sensors.
• Enhances the stability and performance of pH-sensitive dyes for sensing applications.
• Contributes to the field of materials science with a new class of ormosil materials for dye immobilization.