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A Dual Colorimetric/Fluorescence System for Determining pH Based on the Nucleophilic Addition Reaction of an o-Hydroxymerocyanine Dye

Title
A Dual Colorimetric/Fluorescence System for Determining pH Based on the Nucleophilic Addition Reaction of an o-Hydroxymerocyanine Dye
Authors
Yue, YongkangHuo, FangjunLee, SongyiYin, CaixiaYoon, JuyoungChao, JianbinZhang, YongbinCheng, Fangqin
Ewha Authors
윤주영
SCOPUS Author ID
윤주영scopus
Issue Date
2016
Journal Title
CHEMISTRY-A EUROPEAN JOURNAL
ISSN
0947-6539JCR Link1521-3765JCR Link
Citation
vol. 22, no. 4, pp. 1239 - 1243
Keywords
colorimetric probecyaninefluorescent probenucleophilic additionpH sensors
Publisher
WILEY-V C H VERLAG GMBH
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Owing to their ability to monitor pH in a precise and rapid manner, optical probes have widely been developed for biological and nonbiological applications. The strategies thus far employed to determine pH rely on two types of processes including reversible protonation of amine nitrogen atoms and deprotonation of phenols. We have developed a novel dual, colorimetric/fluorescence system for determining the pH of a solution. This system utilizes an o-hydroxymerocyanine dye that undergoes a nucleophilic addition reaction that subsequently causes reversible structural changes interconverting a merocyanine to a spirocyanine and a spirocyanine to a spiropyran. It was demonstrated that the dye can be employed to measure the pH of solutions in the 2.5-5.75 and 9.6-11.8 ranges with color changes from yellow to dark blue and then to lavender. Moreover, the fluorescence response associated with the spirocyanine-spiropyran transformation of the dye occurring in alkaline solutions provides a precise method.
DOI
10.1002/chem.201504395
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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