Determination of Hg(II) at sub-nanomolar levels: A comparative study with nanofibrous materials and continuous thin films

Emission based response of highly luminescent carbozole derivative, 2-(9-methyl-9H-carbazol-3-yl)-5-(pyridin-4-yl)-1,3,4-oxadiazole (ODC-3), to Hg(II) ions was investigated. The dye was encapsulated in ionic liquid doped ethyl cellulose (EC) matrix in form of nanofibrous materials and continuous thi...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2013-05, Vol.181, p.244-250
Main Authors: Ongun, Merve Zeyrek, Ertekin, Kadriye, Hizliates, Cevher Gundogdu, Oter, Ozlem, Ergun, Yavuz, Celik, Erdal
Format: Article
Language:English
Subjects:
cellulose
Electrospinning
Fluorescence
ionic liquids
ions
luminescence
mercury
Nanofiber
nanofibers
Nanosensor
Optical Hg(II) sensor
quantitative analysis
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Summary:Emission based response of highly luminescent carbozole derivative, 2-(9-methyl-9H-carbazol-3-yl)-5-(pyridin-4-yl)-1,3,4-oxadiazole (ODC-3), to Hg(II) ions was investigated. The dye was encapsulated in ionic liquid doped ethyl cellulose (EC) matrix in form of nanofibrous materials and continuous thin films. The nanofibers were fabricated by electrospinning technique. The ratiometric response to Hg(II) ions was monitored at 418nm and 505nm. The quenching behavior follows Stern–Volmer quenching kinetics. The ODC-3 dye can be used for quantitative determination of Hg(II) in the concentration range of 1.0×10−11–1.0×10−3M. With respect to continuous thin films, the electrospun nanofibers offered enhanced sensitivity, lower LOD values and shorter response times in optical chemical sensing of Hg(II).
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2013.01.055