| 초록 |
We synthesized a donor-acceptor conjugated dye (6) possessing an acryloyl group and prepared a pH-sensitive optode membrane via the photo-copolymerization of 6 with a mixture of HEMA and triethylene glycol dimethacrylate on a silanized glass surface. The optode membrane exhibited two absorption bands at approximately 370 and 450 nm, and a strong fluorescence at approximately 630 nm after excitation at 450 nm. The optode membrane displayed a ratiometric absorption response to pH changes. As the pH increased from 0.0 to 2.0, the absorbance ratio of the membrane increased. The fluorescence of the membrane increased with increasing pH from 0.0 to 2.0 and showed a good linear response to pH changes in this range. The membrane operation was reversible, reproducible, and stable for repeated measurements under acidic conditions. The membrane showed an operable response time and good tolerance for high salt concentrations. |
