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A porphyrin derivative containing 2-(oxymethyl)pyridine units showing unexpected ratiometric fluorescent recognition of Zn2+ with high selectivity
- Source :
-
Analytica Chimica Acta . Jun2008, Vol. 616 Issue 2, p214-221. 8p. - Publication Year :
- 2008
-
Abstract
- Abstract: A porphyrin derivative (1), containing two 2-(oxymethyl)pyridine units has been designed and synthesized as chemosensor for recognition of metal ions. Unlike many common porphyrin derivatives that show response to different heavy metal ions, compound 1 exhibits unexpected ratiometric fluorescence response to Zn2+ with high selectivity. The response of the novel chemosensor to zinc was based on the porphyrin metallation with cooperating effect of 2-(oxymethyl)pyridine units. The change of fluorescence of 1 was attributed to the formation of an inclusion complex between porphyrin ring and Zn2+ by 1:1 complex ratio (K =1.04×105), which has been utilized as the basis of the fabrication of the Zn2+-sensitive fluorescent chemosensor. The analytical performance characteristics of the proposed Zn2+-sensitive chemosensor were investigated. The sensor can be applied to the quantification of Zn2+ with a linear range covering from 3.2×10−7 to 1.8×10−4 M and a detection limit of 5.5×10−8 M. The experiment results show that the response behavior of 1 to Zn2+ is pH-independent in medium condition (pH 4.0–8.0) and show excellent selectivity for Zn2+ over transition metal cations. [Copyright &y& Elsevier]
- Subjects :
- *IONS
*RADIOACTIVITY
*IONIZING radiation
*PYRIDINE
Subjects
Details
- Language :
- English
- ISSN :
- 00032670
- Volume :
- 616
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Analytica Chimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 32075703
- Full Text :
- https://doi.org/10.1016/j.aca.2008.04.024