A selective, sensitive probe for mercury(II) ions based on oxazine-thione
2010; Elsevier BV; Volume: 52; Issue: 5 Linguagem: Inglês
10.1016/j.tetlet.2010.11.130
ISSN1873-3581
AutoresQianqian Zhang, Jian‐Feng Ge, Qingfeng Xu, Xue-Bo Yang, Xueqin Cao, Najun Li, Jianmei Lu,
Tópico(s)Luminescence and Fluorescent Materials
ResumoA selective, sensitive probe for Hg(II) ions, 7-(diethylamino)-3-methyl-2H-benzo[b][1,4] oxazine-2-thione (1), is developed. Compound 1 behaves as a ratiometric probe, exhibiting a large blue shift of 100 nm in its absorption spectra upon exposure to Hg(II) ions. The dramatic color change of the solution made ‘naked-eye’ detection of Hg(II) ions possible. Emission spectra of 1 displayed a selective enhancement in intensity in the presence of Hg(II) ions. ESI+-MS analysis indicated that Hg2+-induced desulfurization caused the large absorption response.
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