标题: | Colorimetric sensing of Cu(II): Cu(II) induced deprotonation of an amide responsible for color changes |
作者: | Wu, Shu-Pao Du, Kun-Ju Sung, Yi-Ming 应用化学系 Department of Applied Chemistry |
公开日期: | 2010 |
摘要: | 9,10-Anthraquinone-based chemosensor 1 indicates the presence of Cu(II) ions among other transition metal ions with high selectivity by a color change from yellow to dark red. Chemosensor 2 shows binding toward Cu(II), Ni(II) and Co(II) with color changes from yellow to dark red, red and pale green, respectively. Especially, Co(II) binding with chemosensor 2 causes significantly green fluorescence. On addition of Cu(II), 1 and 2 exhibit 76 and 80 nm red shifts in absorption wavelength (pH 7.0). The effect on pH by the formation of these 1-Cu(II) and 2-Cu(II) complexes was determined by UV-vis spectroscopic pH titration. In the pH range of 6-7.5, a maximum absorption was observed at 473 nm and exhibited the formation of deprotonated 1-Cu(II) and 2-Cu(II) complexes. |
URI: | http://hdl.handle.net/11536/6096 http://dx.doi.org/10.1039/b925898a |
ISSN: | 1477-9226 |
DOI: | 10.1039/b925898a |
期刊: | DALTON TRANSACTIONS |
Volume: | 39 |
Issue: | 18 |
起始页: | 4363 |
结束页: | 4368 |
显示于类别: | Articles |
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