Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 50, Pages 13102-13105Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201803103
Keywords
pH sensing; poly(aryleneethynylene)s; sensors; slot-die coatings
Categories
Funding
- Ministry of Science, Research and Art Baden-Wurttemberg [AZ: 33-753-30-20/ 3/3]
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Fluorescent, water-soluble poly(p-aryleneethynylene)s (PAE) were immobilized on commercially available nylon membranes by using a slot plotter, creating fluorescent, barcode-like sensor strips. Digital imaging by using a standard digital camera, before and after immersion of the strips in buffers of different pH, displays a unique color for each pH value. Statistical evaluation, multivariate analysis of variance (MANOVA) and principal component analysis (PCA), of the acquired data revealed that the immobilized PAEs are superior to the identical fluorophores when dissolved. The pH sensor array discriminates 20 different brands of commercial-cola soft drinks through differences in pH and colorant-PAE interactions.
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