Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 383, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2019.111982
Keywords
Terthiophene; Colorimetric; Fluorescent sensor; Fe3+; Cu2+
Categories
Funding
- National Natural Science Foundation of China [21376125, 21776143]
- Natural Science Foundation of Shandong Province [ZR2017LB009]
- Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province [0308150302]
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A novel terthiophene-derived colorimetric and fluorescent dual-channel sensor termed TTA was designed and synthesized. The sensor TTA showed a significant fluorescence turn-on response to Fe3+ and obvious fluorescence turn-off response to Cu2+ with some good features including chromogenic reaction, high sensitivity and selectivity, ultrafast response time, high reversibility, wide pH working range along with low detection limits (1.09 x 10(-7) and 4.48 x 10(-7) M). The Fe3+/Cu2+-binding mode and recognition mechanism of the sensor were investigated by Job's plot, H-1 NMR titration, FTIR and HRMS spectra. Moreover, the sensor was employed to rapidly and visually determine Fe3+ and Cu2+ in water based on TTA-based paper test strips and solid silica gel with good results.
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