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Coldur M, Oguzlar S, Zeyrek Ongun M, Oter O, Yıldırım S. Usage of thiocyanate-based ionic liquid as new optical sensor reagent: Absorption and emission based selective determination of Fe (III) ions. Spectrochim Acta A Mol Biomol Spectrosc 2020; 224:117385. [PMID: 31336319 DOI: 10.1016/j.saa.2019.117385] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/09/2019] [Accepted: 07/13/2019] [Indexed: 06/10/2023]
Abstract
In this work, the ionic liquid 1-butyl-3-methylimidazolium thiocyanate ([BMIM][SCN]) was evaluated for the first time for its probable usage as new optical sensor reagent for the determination of several metal ions. The ionic liquid exhibited a selective and sensitive response to iron ions in acidic aqueous solutions among all of the tested metal ions. The ([BMIM][SCN]) was encapsulated in ethyl cellulose (EC) matrix in the form of continuous thin films. The effect of [BMIM][SCN] concentration and pH to iron response, the fluorescence quantum yield, the absorption, emission and excitation based characteristics of the ionic liquid in presence of Fe3+ and Fe2+ ions were investigated in both EC and [BMIM][SCN]/aqueous buffer solution mixtures. As a result, the highly sensitive, selective and rapid responding optical sensor reagent which does not need any time-consuming extraction, oxidation and reduction procedures was presented for the distinguishing determination of Fe3+ and Fe2+ in both aqueous solutions and solid thin film matrix. The ionic liquid exhibited a better emission and absorption based response for Fe3+ ions when compared with the Fe2+ ions. The molar absorptivity constant in presence of ionic liquid-based SCN- was enhanced 10 times to 1.21 × 104 L mol-1 cm-1 for Fe3+ ions in the solution phase. Linear absorption and emission-based calibration graphs were obtained for a wide concentration range of 8.0 × 10-8-6.2 × 10-4 M and 8.0 × 10-8-6.2 × 10-5 M for Fe3+, respectively. Limit of detection (LOD) values for absorption and emission-based methods were 2.48 × 10-5 and 2.4 × 10-8, respectively. The reaction is instantaneous and absorbance remains stable for over 4 months.
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Affiliation(s)
- Muge Coldur
- The Graduate School of Natural and Applied Sciences, Dokuz Eylul University, Izmir, Turkey
| | - Sibel Oguzlar
- Center for Fabrication and Application of Electronic Materials, Dokuz Eylul University, Izmir, Turkey
| | - Merve Zeyrek Ongun
- Chemistry Technology Program, Izmir Vocational High School, Dokuz Eylul University, Izmir, Turkey.
| | - Ozlem Oter
- Department of Chemistry, Faculty of Science, Dokuz Eylul University, Izmir, Turkey
| | - Serdar Yıldırım
- Center for Fabrication and Application of Electronic Materials, Dokuz Eylul University, Izmir, Turkey; Department of Metallurgical and Material Engineering, Dokuz Eylul University, Izmir, Turkey
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Kacmaz S, Ertekin K, Mercan D, Oter O, Cetinkaya E, Celik E. An ultra sensitive fluorescent nanosensor for detection of ionic copper. Spectrochim Acta A Mol Biomol Spectrosc 2015; 135:551-9. [PMID: 25123945 DOI: 10.1016/j.saa.2014.07.056] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 07/07/2014] [Accepted: 07/17/2014] [Indexed: 05/21/2023]
Abstract
A stable and ultra sensitive nano-scale fluorescent chemo-sensor for trace amounts of Cu(2+) was proposed. The Cu(2+) selective fluoroionophore 2-{[(2-aminophenyl)imino]methyl}-4,6-di-tert-butylphenol (DMK-7) was encapsulated in polymeric ethyl cellulose. The sensing membranes were fabricated in form of nanofibers and thin films. When embedded in polymers, the exploited DMK-7 dye exhibited enhanced photophysical characteristics in absorbance, Stoke's shift, fluorescence quantum yield, and short and long-term photostability with respect to the solution phase. Sensing abilities of the nanofibers and thin films were tested by steady state and time resolved fluorescence spectroscopy. To our knowledge, this is the first attempt using the DMK-7-doped electrospun nanofibrous materials for copper sensing. The offered sensor displayed a sensitive response with a detection limit of 3.3×10(-13) M for Cu(2+) ions over a wide concentration range of 5.0×10(-12)-5.0×10(-5). Additionally, exhibited high selectivity over convenient cations; Na(+), K(+), Ca(2+), Mg(2+), NH4(+) and Ag(+), Al(3+), Ba(2+), Co(2+), Cr(3+), Fe(3+), Fe(2+), Hg(2+), Li(+), Mn(2+), Ni(2+), Pb(2+), Sn(2+) and Zn(2+).
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Affiliation(s)
- Sibel Kacmaz
- Giresun University, Faculty of Engineering, Department of Food Engineering, 28200 Giresun, Turkey; University of Dokuz Eylul, The Graduate School of Natural and Applied Sciences, Department of Chemistry, 35160 Izmir, Turkey
| | - Kadriye Ertekin
- University of Dokuz Eylul, Faculty of Sciences, Department of Chemistry, 35160 Izmir, Turkey; University of Dokuz Eylul, Center for Fabrication and Application of Electronic Materials (EMUM), 35160 Izmir, Turkey
| | - Deniz Mercan
- University of Ege, Faculty of Sciences, Department of Chemistry, 35100 Izmir, Turkey
| | - Ozlem Oter
- University of Dokuz Eylul, Faculty of Sciences, Department of Chemistry, 35160 Izmir, Turkey
| | - Engin Cetinkaya
- University of Ege, Faculty of Sciences, Department of Chemistry, 35100 Izmir, Turkey
| | - Erdal Celik
- University of Dokuz Eylul, Faculty of Engineering, Department of Metallurgical and Materials Engineering, 35160 Izmir, Turkey; University of Dokuz Eylul, Center for Fabrication and Application of Electronic Materials (EMUM), 35160 Izmir, Turkey
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Oter O, Polat B. Spectrofluorometric Determination of Carbon Dioxide Using 8-Hydroxypyrene-1,3,6-trisulfonic Acid in a Zeolite Composite. ANAL LETT 2014. [DOI: 10.1080/00032719.2014.947538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Topal SZ, Önal E, Ertekin K, Oter O, Gürek AG, Hirel C. Significant sensitivity and stability enhancement of tetraphenylporphyrin-based optical oxygen sensing material in presence of perfluorochemicals. J PORPHYR PHTHALOCYA 2013. [DOI: 10.1142/s1088424613500193] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Emission-based oxygen sensing properties of highly luminescent tetraphenylporphyrin molecules were investigated in polystyrene, ethyl cellulose, poly(1-trimethylsilyl-1-propyne) and poly(isobutylmethacrylate) matrices. The effect of perfluorochemicals (PFCs) on oxygen sensitivity and stability of the sensor materials was also examined. Fluorescence intensity and lifetime measurements of meso-tetraphenylporphyrinato Zn ( II ) (ZnTPP) and meso-tetraphenylporphyrin (H2TPP) materials were performed in the concentration range of 0–100% pO 2. The fluorescence intensity variation of H2TPPvs. oxygen was 86%. H2TPP-based composite also yielded higher Stern–Volmer constant, faster response and regeneration time, excellent long term photostability and larger linear response range with respect to ZnTPP. The detection limit of oxygen for H2TPP was less than 0.5%. When stored in sealed bags protected from sunlight, no decrease in oxygen sensitivity was observed during approximately five months. As far as we know, the gathered utilization of PFCs and H2TPP embedded in polymer matrices was not previously described in literature, and has present amelioration compared to materials already existing.
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Affiliation(s)
- Sevinc Z. Topal
- Gebze Institute of Technology, Department of Chemistry, P.O.Box 141, 41400 Gebze, Kocaeli, Turkey
| | - Emel Önal
- Gebze Institute of Technology, Department of Chemistry, P.O.Box 141, 41400 Gebze, Kocaeli, Turkey
| | - Kadriye Ertekin
- University of Dokuz Eylul, Faculty of Arts and Sciences, Department of Chemistry, 35160 Buca, Izmir, Turkey
| | - Ozlem Oter
- University of Dokuz Eylul, Faculty of Arts and Sciences, Department of Chemistry, 35160 Buca, Izmir, Turkey
| | - Ayşe G. Gürek
- Gebze Institute of Technology, Department of Chemistry, P.O.Box 141, 41400 Gebze, Kocaeli, Turkey
| | - Catherine Hirel
- Gebze Institute of Technology, Department of Chemistry, P.O.Box 141, 41400 Gebze, Kocaeli, Turkey
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Oter O, Aydogdu S. Determination of Aluminum Ion with Morin in a Medium Comprised by Ionic Liquid–Water Mixtures. J Fluoresc 2010; 21:43-50. [DOI: 10.1007/s10895-010-0688-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Accepted: 06/01/2010] [Indexed: 10/19/2022]
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Ertekin K, Oter O, Ture M, Denizalti S, Cetinkaya E. A Long Wavelength Excitable Fluorophore; Chloro Phenyl Imino Propenyl Aniline (CPIPA) for Selective Sensing of Hg (II). J Fluoresc 2009; 20:533-40. [DOI: 10.1007/s10895-009-0577-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2009] [Accepted: 12/07/2009] [Indexed: 10/20/2022]
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Oter O, Ribou AC. Quenching of Long Lifetime Emitting Fluorophores with Paramagnetic Molecules. J Fluoresc 2008; 19:389-97. [DOI: 10.1007/s10895-008-0425-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2008] [Accepted: 10/07/2008] [Indexed: 11/29/2022]
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Oter O, Ertekin K, Derinkuyu S. Ratiometric sensing of CO2 in ionic liquid modified ethyl cellulose matrix. Talanta 2008; 76:557-63. [DOI: 10.1016/j.talanta.2008.03.047] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2007] [Revised: 03/20/2008] [Accepted: 03/25/2008] [Indexed: 11/26/2022]
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Derinkuyu S, Ertekin K, Oter O, Denizalti S, Cetinkaya E. Fiber optic pH sensing with long wavelength excitable Schiff bases in the pH range of 7.0–12.0. Anal Chim Acta 2007; 588:42-9. [PMID: 17386792 DOI: 10.1016/j.aca.2007.01.070] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2006] [Revised: 01/22/2007] [Accepted: 01/27/2007] [Indexed: 11/16/2022]
Abstract
Most of the fluorescent pH probes work near neutral or acidic regions of the pH scale. In this work, two different fluorescent Schiff bases, chloro phenyl imino propenyl aniline (CPIPA) and nitro phenyl imino propenyl aniline (NPIPA), have been investigated for pH sensing in the alkaline region. Absorption and emission based spectral data, quantum yield, fluorescence lifetime, photostability and acidity constant (pK(a)) of the Schiff bases were determined in conventional solvents and in PVC. The long wavelength excitable immobilized Schiff bases CPIPA (lambda(ex)=556 nm) and NPIPA (lambda(ex)=570 nm) exhibited absorption and emission based optical response to proton in the pH range of 8.0-12.0 and 7.0-12.0, respectively. Response of the CPIPA was fully reversible within the dynamic working range. The response times were between 3-13 min. A relative signal change of 95% and 96% have been achieved for sensor dyes of CPIPA and NPIPA, respectively. The CPIPA displayed better fluorescence quantum yield (varphi(F)=3.7 x 10(-1)) and higher matrix compatibility compared to NPIPA (varphi(F)=1.6 x 10(-1)) in immobilized PVC. The CPIPA and NPIPA exhibited a slight cross sensitivity to the ions of Hg(+) and Fe(3+), respectively.
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Affiliation(s)
- Sibel Derinkuyu
- University of Dokuz Eylul, Faculty of Arts and Sciences, Department of Chemistry, 35160 Buca, Izmir, Turkey
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Oter O, Akcay H. Use of natural clinoptilolite to improve water quality: sorption and selectivity studies of lead(II), copper(II), zinc(II), and nickel(II). Water Environ Res 2007; 79:329-35. [PMID: 17469665 DOI: 10.2175/106143006x111880] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Natural clinoptilolite can be used as an ion exchanger for removal of heavy metals and treatment of environmental pollution because of its desirable characteristics of high ion exchange selectivity and resistance to different media. In this work, the potential of natural clinoptilolite from Gördes mines (West Anatolia, Turkey) for the uptake of lead(II), nickel(II), copper(II), and zinc(II), from their single and mixed ion solutions, was evaluated using the batch method. The mineralogical and chemical properties of the sorption material were carried out by X-ray diffraction, X-ray fluoremetry, scanning electron microscopy, and wet analysis. Contact time, initial solution pH, solid-to-liquid ratio, and initial metal cation concentration were determined as single ion sorption parameters. The silicon/aluminum ratio and the theoretical and equivalent exchange capacities, both in single and mixed solutions, were established. Corresponding adsorption constants and distribution coefficients have been found.
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Affiliation(s)
- Ozlem Oter
- Department of Chemistry, Dokuz Eylül University, 35160, Tinaztepe, Izmir, Turkey.
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Oter O, Ertekin K, Kirilmis C, Koca M. Spectral characterization of a newly synthesized fluorescent semicarbazone derivative and its usage as a selective fiber optic sensor for copper(II). Anal Chim Acta 2007; 584:308-14. [PMID: 17386620 DOI: 10.1016/j.aca.2006.11.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2006] [Revised: 11/16/2006] [Accepted: 11/20/2006] [Indexed: 11/18/2022]
Abstract
In this work photoluminescent properties of highly Cu(2+) selective organic fluoroionophore, semicarbazone derivative; bis(naphtho[2,1-b]furan-2-yl)methanone semicarbazone (BNF) was investigated in different solvents (dichloromethane, tetrahydrofuran, toluene and ethanol) and in polymer matrices of polyvinylchloride (PVC) and ethyl cellulose (EC) by absorption and emission spectrometry. The BNF derivative displayed enhanced fluorescence emission quantum yield, Q(f)=6.1 x 10(-2) and molar extinction coefficient, epsilon=29,000+/-65 cm(-1)M(-1) in immobilized PVC matrix, compared to 2.6 x 10(-3) and 24,573+/-115 in ethanol solution. The offered sensor exhibited remarkable fluorescence intensity quenching upon exposure to Cu(2+) ions at pH 4.0 in the concentration range of 1.0 x 10(-9) to 3.0 x 10(-4)M [Cu(2+)] while the effects of the responding ions (Ca(2+), Hg(+), Pb(2+), Al(3+), Cr(3+), Mn(2+), Mg(2+), Sn(2+), Cd(2+), Co(2+) and Ni(2+)) were less pronounced.
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Affiliation(s)
- Ozlem Oter
- University of Dokuz Eylul, Faculty of Arts and Sciences, Department of Chemistry, 35160 Tinaztepe, Izmir, Turkey
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Oter O, Ertekin K, Topkaya D, Alp S. Emission-based optical carbon dioxide sensing with HPTS in green chemistry reagents: room-temperature ionic liquids. Anal Bioanal Chem 2006; 386:1225-34. [PMID: 16896616 DOI: 10.1007/s00216-006-0659-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2006] [Revised: 05/30/2006] [Accepted: 06/28/2006] [Indexed: 10/24/2022]
Abstract
We describe the characterization of a new optical CO(2) sensor based on the change in the fluorescence signal intensity of 8-hydroxypyrene-1,3,6-trisulfonic acid trisodium salt (HPTS) in green chemistry reagents--room-temperature ionic liquids (RTILs). As far as we are aware, this is the first time RTILs, 1-methyl-3-butylimidazolium tetrafluoroborate (RTIL-I) and 1-methyl-3-butylimidazolium bromide (RTIL-II), have been used as matrix materials with HPTS in an optical CO(2) sensor. It should be noted that the solubility of CO(2) in water-miscible ionic liquids is approximately 10 to 20 times that in conventional solvents, polymer matrices, or water. The response of the sensor to gaseous and dissolved CO(2) has been evaluated. The luminescence intensity of HPTS at 519 and 521 nm decreased with the increasing concentrations of CO(2) by 90 and 75% in RTIL-I and RTIL-II, respectively. The response times of the sensing reagents were in the range 1-2 min for switching from nitrogen to CO(2), and 7-10 min for switching from CO(2) to nitrogen. The signal changes were fully reversible and no significant hysteresis was observed during the measurements. The stability of HPTS in RTILs was excellent and when stored in the ambient air of the laboratory there was no significant drift in signal intensity after 7 months. Our stability tests are still in progress.
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Affiliation(s)
- Ozlem Oter
- Faculty of Arts and Science, Department of Chemistry, University of Dokuz Eylul, 35160 Tinaztepe, Izmir, Turkey
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