ELECTROSPUN NANOFIBROUS POLYMER AS RESPONSIVE FLUORESCENCE BASED DETECTOR FOR Cd (II) METAL ION IN AQUEOUS SOLUTION
Abstract
A new fluorescent electrospun fiber polymer 1-(2-Pyridylazo)-2-naphthol (PAN) − poly(acrylic acid) (PAA) previously synthesized by covalent functionalization of PAN into PAA and electrospinning technique was applied for Cd2+ probe via fluorescence enhancement due to coordination of the metal ion. The fluorescent indicator molecule (PAN−PAA) exhibits distinct and well-defined emission peak. Emission maximum of the functionalized polymer molecule appeared at 593 nm which is indicative of a good Stokes’ shift. In order to get clearer insight into the florescence of the functionalized polymer, the fluorescence behavior was measured with addition of various metal (Cd2+ ,Cr3+,Co2+,Fe2+ andNi2+). The fluorescence “turn-on†effect of PAN−PAA upon addition of Cd2+ was predominant. It was observed that addition of Cd2+ at trace concentration of 5.0 µM increases the emission intensity dramatically up to 75%. However, compared with other competing metal ions, reduction in emission intensity was observed. More importantly with Ni2+ where the fluorescence intensity at 593 nm decreased to less than 2%. Basically, non energy transfer and diamagnetic interactions are suggested to be responsible for this enhancement by transition metal ions. Keywords:  Nanofiber, fluorescence, 1-(2-Pyridylazo)-2-naphthol, polyacrylic acid, cadmiumDownloads
Published
2017-02-14
How to Cite
Adewuyi, S. (2017). ELECTROSPUN NANOFIBROUS POLYMER AS RESPONSIVE FLUORESCENCE BASED DETECTOR FOR Cd (II) METAL ION IN AQUEOUS SOLUTION. Journal of Chemical Society of Nigeria, 40(2). Retrieved from http://www.journals.chemsociety.org.ng/index.php/jcsn/article/view/32
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