title: Holmium(III)-selective fluorimetric optode based on N,N-bis(salicylidene)-naphthylene-1,8-diamine as a neutral fluorogenic ionophore.
abstract: For the first time a highly sensitive and selective fluorimetric optode for determination of trace amounts of Ho(3+) ions was prepared. The sensing system was prepared by incorporating of N,N-bis(salicylidene)-naphthylene-1,8-diamine (L) as a neutral Ho(3+)-selective fluoroionophore, in a plasticized PVC membrane containing sodium tetraphenyl borate as a lipophilic anionic additive. The response of the sensor is based on the strong fluorescence quenching of L by Ho(3+) ions. At pH 5.4, the proposed sensor displays a calibration curve over a wide concentration range of 1.0×10(-10)-1.0×10(-3)M, with a relatively fast response time of less than 1 min. In addition to high stability, high reproducibility and a relatively long working lifetime, the sensor shows a good selectivity towards Ho(3+) ion with respect to common coexisting cations. The fluorescence optode was applied to determination of holmium ion contents of water samples.
authors.affiliation: Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran; Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran. Electronic address: ganjali@khayam.ut.ac.ir.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Ganjali
authors.affiliation: Department of Life Science Engineering, Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran.
authors.forename: Morteza
authors.initials: M
authors.lastname: Hosseini
authors.affiliation: Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran.
authors.forename: Anahita
authors.initials: A
authors.lastname: Karimi
authors.affiliation: Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran.
authors.forename: Hedieh
authors.initials: H
authors.lastname: Haji-Hashemi
authors.affiliation: Institute of Nano Science and Nano Technology, University of Kashan, Kashan, Iran.
authors.forename: Masoud
authors.initials: M
authors.lastname: Salavati-Niasari
authors.affiliation: Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran; Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Parviz
authors.initials: P
authors.lastname: Norouzi
mesh_terms: D015057:1-Naphthylamine / Q000031:analogs & derivatives* / Q000737:chemistry; D003959:Diamines / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D005470:Fluorometry / Q000379:methods*; D006695:Holmium / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D017736:Ion-Selective Electrodes; D007476:Ionophores / Q000737:chemistry*; D015203:Reproducibility of Results; D045483:Rivers / Q000737:chemistry; D012545:Schiff Bases / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013997:Time Factors; D014881:Water Supply
chemical_list: D003959:Diamines; D005456:Fluorescent Dyes; D007476:Ionophores; C000591531:N,N-bis(salicylidene)naphthylene-1,8-diamine; D012545:Schiff Bases; D012996:Solutions; D015057:1-Naphthylamine; D006695:Holmium
keywords: Fluorescence quenching; Ho(III); Optode; PVC membrane; Sensor