Journal
DYES AND PIGMENTS
Volume 190, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109265
Keywords
Ratiometric; Colorimetric; Fluorescent sensor; pH; Large Stokes shift; Alkaline solution
Funding
- Innovation Project of Shandong Academy of Medical Sciences
- National Natural Science Foundation of China [21801158]
- Shandong Academy of Medical Sciences Foundation [2018-17]
- Graduate Instructor Guidance Ability Improvement Project of University of Jinan [JDYY1804]
- Academic Promotion Programme of Shandong First Medical University [2019LJ003]
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A facile hemicyanine-naphthalene-based fluorescent sensor was constructed for colorimetric and ratiometric sensing of pH through a simple synthesis process. Sensor 3 exhibited high sensitivity to extremely alkaline solutions and had a notably large Stokes shift. The fluorescence intensity increased significantly in the pH range of 5.0–12.0, making it a promising tool for detecting extremely alkaline solutions.
In this work, a facile hemicyanine-naphthalene-based fluorescent sensor for colorimetric and ratiometric sensing of pH was constructed via a simple synthesis process. Significantly, sensor 3 showed a high sensitivity to extremely alkaline solution and had a notably large Stokes shift (145 nm). Its absorbance and fluorescence enhanced or quenched obviously in the pH range of 5.0?12.0, accompanying with colour change. In addition, the fluorescence intensity increased 727-fold (F440/F710) when the pH was adjusted to 12, indicating that sensor 3 showed great potential in the detection of extremely alkaline solution.
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