Abstract
Here we report recent studies of pH and polarity fluorescent molecular sensorics involving range of 4-bora-3a,4a-diaza-s-indacene (BODIPY) derivatives. Photophysical characteristics of the dyes were investigated in liquid solutions and in bulk materials, doped to sol-gel silicon dioxide (pure and with surface modifiers), polymethylmethacrylate (PMMA), polysulfone (PSU) and polyvinyl chloride (PVC) matrices. Investigated compounds were shown to be effective fluorescent probes for precise evaluation of H+ concentration in a broad range of input values (pH 2–12). Factors affecting accuracy of the measurements in solvents and matrices of a different nature are discussed. Finally, Catalan linear regression is introduced as a potential approach for discrimination of solvent polarity effects from acidity.
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