Development of pH-sensitive indicator dyes for the preparation of micro-patterned optical sensor layers
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Functional hydroxyazobenzene dyes for optically monitoring pH in the range from 6 to 10 were synthesised. The pKa values of the dyes have been tailored by appropriate choice of substituents in position para to the hydroxy group, resulting in lower pKa values for electron acceptor substituents and higher pKa for electron donors. Furthermore, substituent effects on absorbance spectra have been evaluated, with expected shifts to longer wavelength in the case of electron donors. For immobilisation, the indicator dyes were covalently linked to cellulose films via vinylsulfonyl chemistry. Mechanical stabilization of the cellulose films was achieved by lamination onto polyethylene terephthalate foils. In order to obtain patterned sensor layers with geometrical defined sensing areas a laser-structured adhesive tape was used as protective mask in the dyeing step.
Details
Original language | English |
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Pages (from-to) | 206-210 |
Number of pages | 5 |
Journal | Sensors and Actuators, B: Chemical |
Volume | 150 |
Issue number | 1 |
Publication status | Published - 21 Oct 2010 |
Peer-reviewed | Yes |
External IDs
ORCID | /0000-0002-0757-3325/work/139064952 |
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Keywords
ASJC Scopus subject areas
Keywords
- Chemosensor, Optical sensor film, pH-sensitive dyes, Vinylsulfonyl chemistry