title: Development of a novel fluorimetric bulk optode membrane based on meso-tetrakis(2-hydroxynaphthyl) porphyrin (MTHNP) for highly sensitive and selective monitoring of trace amounts of Hg2+ ions.
abstract: The fluorescence spectra and response characteristics of two porphyrin compounds meso-tetrakis(2-hydroxynaphthyl) porphyrin and meso-tetra (2-thiophene) porphyrin (MTHNP) to Hg(2+) were investigated. MTHNP showed preferable fluorescence response to Hg(2+). Thereby, an efficient and selective fluorimetric optode membrane based on the fluorescence quenching of MTHNP for Hg(2+) ion determination at low concentration levels has been developed. The sensing membrane containing MTHNP reversibly responded to Hg(2+) with a working concentration range covering from 5.0×10(-9) to 1.25×10(-5)M with a relatively fast response time less than 3min. In addition to high stability, reversibility and reproducibility, the sensor showed extremely high selectivity toward Hg(2+) ion with respect to some alkali, alkaline earth and heavy metal ions. The limit of detection for Hg(2+) was 5.0×10(-9)M. The proposed fluorescent sensor was successfully applied to the direct determination of mercury content of biofenac eye drop, hair and different water samples.
authors.affiliation: Department of Chemistry, Razi University, Kermanshah, Iran. Electronic address: mshamsipur@yahoo.com.
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Shamsipur
authors.affiliation: Department of Chemistry, Razi University, Kermanshah, Iran. Electronic address: m.sadeghi@razi.ac.ir.
authors.forename: Marzieh
authors.initials: M
authors.lastname: Sadeghi
authors.affiliation: Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston IL 60208-3113, USA.
authors.forename: Mohammad Hassan
authors.initials: MH
authors.lastname: Beyzavi
authors.affiliation: Department of Chemistry, Shiraz University, Shiraz, Iran.
authors.forename: Hashem
authors.initials: H
authors.lastname: Sharghi
mesh_terms: D002413:Cations, Divalent / Q000032:analysis*; D005453:Fluorescence; D008567:Membranes, Artificial; D008628:Mercury / Q000032:analysis*; D011166:Porphyrins / Q000737:chemistry*; D012680:Sensitivity and Specificity
chemical_list: D002413:Cations, Divalent; D008567:Membranes, Artificial; D011166:Porphyrins; D008628:Mercury
keywords: Fluorescent sensor; Hg(II); Porphyrin