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A fluorescent chemosensor for cobalt ions based on a multi-substituted phenol-ruthenium(II) tris(bipyridine) complex
- Source :
-
Analytica Chimica Acta . Nov2006, Vol. 580 Issue 2, p143-148. 6p. - Publication Year :
- 2006
-
Abstract
- Abstract: An amide-linked 2,6-bis{[(2-hydroxy-5-tert-butylbenzyl)(pyridyl-2-methyl)-amino]-methyl}-4-methylphenol-ruthenium(II) tris(bipyridine) 2PF6 − complex, 1, was first used to recognize Co(II) in EtOH/H2O (1:1, v/v) solution, with the ruthenium(II) tris(bipyridine) moiety selected as a fluorophore and the multi-substituted phenol unit chosen as a receptor. The fluorescence quenching of 1 was attributed to the formation of an inclusion complex between multi-substituted phenol unit and Co(II) by 1:1 complex ratio (K =2.5×105), which has been utilized as the basis of the fabrication of the Co(II)-sensitive fluorescent chemosensor. The analytical performance characteristics of the proposed Co(II)-sensitive chemosensor were investigated. The sensor can be applied to the quantification of Co(II) with a linear range covering from 1.0×10−7 to 5.0×10−5 M and a detection limit of 5×10−8 M. The experiment results show that the response behavior of 1 to Co(II) is pH-independent in medium condition (pH 4.5–9.5) and show excellent selectivity for Co(II) over transition metal cations except Cu(II). The chemosensor has been used for determination of Co(II) in water samples. [Copyright &y& Elsevier]
- Subjects :
- *BIPYRIDINE
*TRANSITION metals
*INTERMEDIATES (Chemistry)
*PROPERTIES of matter
Subjects
Details
- Language :
- English
- ISSN :
- 00032670
- Volume :
- 580
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Analytica Chimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 22943494
- Full Text :
- https://doi.org/10.1016/j.aca.2006.07.054