dc.contributor.authorLi, Junbo
dc.contributor.authorGao, Junkuo
dc.contributor.authorXiong, Wei-Wei
dc.contributor.authorLi, Pei-Zhou
dc.contributor.authorZhang, Huacheng
dc.contributor.authorZhao, Yanli
dc.contributor.authorZhang, Qichun
dc.identifier.citationLi, 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.en_US
dc.description.abstractA 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).en_US
dc.relation.ispartofseriesChemistry - an Asian journalen_US
dc.rights© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.en_US
dc.titlePyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanideen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US

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