title: Selective recognition of Pr3+ based on fluorescence enhancement sensor.
abstract: (E)-2-(1-(4-hydroxy-2-oxo-2H-chromen-3-yl)ethylidene)hydrazinecarbothioamide (L) has been used to detect trace amounts of praseodymium ion in acetonitrile-water solution (MeCN/H2O) by fluorescence spectroscopy. The fluorescent probe undergoes fluorescent emission intensity enhancement upon binding to Pr(3+) ions in MeCN/H2O (9/1:v/v) solution. The fluorescence enhancement of L is attributed to a 1:1 complex formation between L and Pr(3+), which has been utilized as the basis for selective detection of Pr(3+). The sensor can be applied to the quantification of praseodymium ion with a linear range of 1.6×10(-7) to 1.0×10(-5) M. The limit of detection was 8.3×10(-8) M. The sensor exhibits high selectivity toward praseodymium ions in comparison with common metal ions. The proposed fluorescent sensor was successfully used for determination of Pr(3+) in water samples.
authors.affiliation: Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran. ganjali@khayam.ut.ac.ir
authors.forename: M R
authors.initials: MR
authors.lastname: Ganjali
authors.forename: M
authors.initials: M
authors.lastname: Hosseini
authors.forename: A
authors.initials: A
authors.lastname: Ghafarloo
authors.forename: M
authors.initials: M
authors.lastname: Khoobi
authors.forename: F
authors.initials: F
authors.lastname: Faridbod
authors.forename: A
authors.initials: A
authors.lastname: Shafiee
authors.forename: P
authors.initials: P
authors.lastname: Norouzi
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D007477:Ions; D007700:Kinetics; D011221:Praseodymium / Q000032:analysis*; D012663:Semicarbazides / Q000138:chemical synthesis / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D014867:Water / Q000737:chemistry
chemical_list: D000097:Acetonitriles; D007477:Ions; D012663:Semicarbazides; D012996:Solutions; D014867:Water; D011221:Praseodymium; C032159:acetonitrile
keywords: Enhancement; Fluorescence; Fluorescent sensor; Praseodymium