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Fluorescent dyes bound to hydrophilic copolymers: Applications in aqueous halide sensing
Author(s) -
Geddes Chris D.,
Douglas Peter
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(20000502)76:5<603::aid-app1>3.0.co;2-6
Subject(s) - halide , copolymer , iodide , aqueous solution , fluorescence , bromide , polymer chemistry , diffusion , selectivity , chemistry , materials science , photochemistry , inorganic chemistry , polymer , organic chemistry , catalysis , optics , physics , thermodynamics
A range of halide‐sensitive fluorophores were bound to two hydrophilic copolymers. Thin films of the copolymers swelled in the aqueous media, allowing dye fluorescence to be dynamically quenched by the diffusion of halide ions. The resultant sensor films were characterized in terms of their hydrophilicity, sensitivity, and selectivity toward halide. The sensor films were reversibly capable of determining aqueous bromide and iodide at a mildly alkaline pH with typical 90% response times of 30–70 s and a shelf life in excess of 2 years. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 603–615, 2000