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Title: Pyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanide
Authors: Li, Junbo
Gao, Junkuo
Xiong, Wei-Wei
Li, Pei-Zhou
Zhang, Huacheng
Zhao, Yanli
Zhang, Qichun
Keywords: DRNTU::Science::Chemistry
Issue Date: 2014
Source: Li, J., Gao, J., Xiong, W.-W., Li, P.-Z., Zhang, H., Zhao, Y., et al. (2014). Pyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanide. Chemistry - An Asian Journal, 9(1), 121-125.
Series/Report no.: Chemistry - an Asian journal
Abstract: A new chemodosimeter based on pyridinium-fused pyridinone iodide (PI) has been obtained through a “clean reaction” method. This compound can detect CN− in aqueous solution with a high selectivity and rapid response. The detection of CN− occurs through the nucleophilic attack of CN− on the C[DOUBLE BOND]N bond, which induces the destruction of the π-conjugation on the pyridinium ring. Support of this detection mechanism was obtained by 1H NMR titration, HR-MS, and DFT calculations. Upon the addition of 10 equivalents CN− to a solution of PI in THF/H2O (1:1, v/v), a 57-fold enhancement in fluorescence intensity was observed at the maximum emission wavelength of 457 nm. Meanwhile, the maximum absorption wavelength was also blue-shifted from 447 nm to 355 nm. Other common anions such as BF4−, PF6−, F−, Cl−, Br−, I−, H2PO4−, ClO4−, CH3COO−, NO2−, N3−, and SCN− had little effect on the detection of CN−. The response time of PI for CN− was less than 5 seconds. The detection limit was calculated to be 5.4×10−8 m, which is lower than the maximum permission concentration in drinking water (1.9 μm) set by the World Health Organization (WHO).
ISSN: 1861-4728
DOI: 10.1002/asia.201301144
Schools: School of Materials Science & Engineering 
School of Physical and Mathematical Sciences 
Rights: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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