Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 240, Issue -, Pages 793-800Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.09.054
Keywords
Fluorescent chemosensor; Oligothiophene; Schiff base; Hg2+; Cu2+
Funding
- National Natural Science Foundation of China [21376125]
- Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province
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A novel oligothiophene-phenylamine based Shiff-base 3TN was successfully developed as a dual fluorescent chemosensor for the rapid detection of Hg2+ and Cu2+ ions in THE/H2O (7/3, v/v) solution. Interestingly, 3TN upon interaction with various metal cations displays highly selective fluorescent turn on response to Hg2+ and selective fluorescent turn-off response to Cu2+. The recognition process was highly reversible and completed within 2 min. The 1:1 binding modes (3TN/Hg2+ and 3TN/Cu2+) were proved by fluorescence measurements and FT-IR. Sensor 3TN also exhibits high anti-interference performance towards Hg7+/Cu2+ over other metal ions in a wide pH range. Moreover, the quite low detection limit was found to be 1.16 x 10(-7) M for Hg2+ and 7.06 x 10(-8) M for Cu2+. Therefore, these investigated results demonstrates that sensor 3TN has great potential to detect Hg2+ and Cu7+ ions in environmental analysis systems. (C) 2016 Elsevier B.V. All rights reserved.
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