Journal
TALANTA
Volume 208, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2019.120363
Keywords
Fluorescence; Ratiometric sensor; Nitroaromatic compound; Metal-organic framework
Categories
Funding
- National Natural Science Foundation of China [21601050]
- NSFC-Henan region joint funds [U1604124]
- Science and Technology Department of Henan Province [182300410183, 162300410011]
- key scientific research project of Henan higher education [16A150010]
- Thousand Talents Program of China
- Liaoning Revitalization Talents Program-Pan Deng Scholars [XLYC1802005]
- Science and Technology Innovative Talents Support Program of Shenyang [RC180166]
- Australian Research Council (ARC) [DE150101306, LP160100927]
- University of Newcastle
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In this paper, we report the synthesis of a multifunctional fluorescent probe Tb-CP, Tb(HL)(EtOH)(2)(NO3)(2) (HPU-10) (H2L = 2,6-bis-(5-pyridin-4-yl-1H-[1,2,4]triazol-3-yl)- pyridine), and demonstrate that this novel chemosensor has the property of ratiometric detection of Zn2+ and Cd2+. The detection limit of HPU-10 sensing Zn2+ and Cd2+ is 0.319 and 0.965 mu M, respectively. The sensing mechanism can be explained by (i) the decomposition of HPU-10 and (ii) the recombination of Zn2+ or Cd2+ with ligand forming 2HL(-)-Zn2+ or 2HL(-)-Cd2+, respectively. Moreover, the fluorescent sensor HPU-10 can detect the nitroaromatic compound 2, 4-DNP via a fluorescence quenching mechanism. The detection limits obtained from linear regression curve plots of 2, 4-DNP is calculated to be 1.69 mu M. In addition, the possible use of the probe coated paper for tracing the target analytes has also been presented.
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