A highly versatile stable optical sensor based on 4-decyloxy-2-(2-pyridylazo)-1-naphthol in Nafion for the determination of copper

Sands, Terry J.; Cardwell, Terence J.; Cattrall, Robert W.; Farrell, John R.; Iles, Peter J.; Kolev, Spas D.

doi:10.1016/s0925-4005(02)00047-3

Cited by 33 publications

(14 citation statements)

References 17 publications

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“…Many optical chemical sensors utilize colored complexes [14][15][16] or redox reagents [17,18] immobilized in suitable matrix. Several methods have been used to immobilize reagents in optical sensors used for heavy metal ions, such as covalent binding [19,20], electrostatic attraction to a resin [21,22], incorporation into PVC membranes [23][24][25][26][27][28], and entrapment inside Nafion films [14,17,29]. Since polymer matrix, particularly PVC, can easily trap the ionophorebased liquid membrane system, a great deal of interesting has been focused on the PVC-based membranes [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Nickel(II) Selective PVC‐Based Membrane Sensor Using a Schiff Base

Rezaei

Hadadzadeh

Azimi

2011

International Journal of Spectroscopy

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A polyvinylchloride (PVC) membrane optode was prepared by using 1,2-di(o-salicylaldiminophenylthio)ethane (H 2 DSALPTE) as a chelating reagent for selective determination of Ni(II) ions. The optimized membranes incorporating H 2 DSALPTE as an ionophore, sodium tetraphenylborate (NaTPB) as an anion excluder, and tributyl phosphate (TBP) as a solvent mediator were prepared and applied for determination of Ni(II) ions. The membrane responded to Ni(II) ion by changing the color from yellow to green in an acetate buffer solution at pH 6.0. The best performance was observed when the membrane having a composition of 3.17% ligand, 31.64% PVC, 63.29% TBP, and 1.90% NaTPB. The membrane can be worked well over a wide concentration range from 1.0×10−5 to 5.0×10 −3 M. The membrane exhibited a detection limit of 8.51×10 −6 M, and the response time of the membrane was within 7-12 min depending on the concentration of Ni(II) ions. The selectivity of the probe towards nickel determination was found to be very good. Experimental results showed that the probe could be used as an effective tool in analyzing the Ni(II) content of water samples.

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Section: Introductionmentioning

confidence: 99%

Nickel(II) Selective PVC‐Based Membrane Sensor Using a Schiff Base

Rezaei

Hadadzadeh

Azimi

2011

International Journal of Spectroscopy

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“…In recent years, many efforts have been made to prepare heterogeneous heavy metal ion sensors based on solid materials [1,[9][10][11][12][13][14][15]. For example, nanosensors designed for the naked-eye detection of toxic metal ions have been developed by the immobilization of commercially available chromophores into spherical nanosized cavities and surfaces [1,9].…”

Section: Introductionmentioning

confidence: 99%

“…This sensor selectively responds to Hg 2+ but its reusability is unsatisfactory. Other heavy metal ion sensors based on cellulose supported platforms [11], polyvinylchloride (PVC) [12,13], ethyl cellulose (EC) [13], Nafion membranes [14] or other polymers [15] also have been prepared. These sensors are inexpensive and reusable, but the response time is longer and the sensitivity is lower than that of the nanosized sensors.…”

Section: Introductionmentioning

confidence: 99%

“…It has been widely employed in the complexing of heavy metal ions due to it's remarkable color change from yellow to red when complexed with metal ions such as Zn 2+ , Cd 2+ , Ni 2+ , Hg 2+ , Pb 2+ and Cu 2+ . Some applications based on PAR and its analogues have been put into practice [11,14,[24][25][26]. The Mannich reaction is one of the most suitable reactions for the modification of compounds containing phenol moieties.…”

Section: Introductionmentioning

confidence: 99%

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PAR immobilized colorimetric fiber for heavy metal ion detection and adsorption

Zhang

et al. 2010

Journal of Hazardous Materials

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“…[5][6][7][8][9] Thus optochemical sensors can offer advantages in terms of size, cost, not requiring a reference element, and transmitting without the influence of an electromagnetic field. Most of these optodes are based on absorption or reflectance measurements of immobilized colorimetric reagents in various matrices.…”

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confidence: 99%

An Optode Sensor for Cu2+ with High Selectivity Based on Porphyrin Derivative Appended with Bipyridine

et al. 2007

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Copper is an essential trace element in plants and animals. Following zinc and iron, it ranks the third in abundance in human bodies among the essential heavy metals. 1 Copper participates in many biological processes, such as haemoglobin synthesis (in Fe utilization and Hb regeneration), connective tissue development, normal functions of the central nervous system, and oxidative phosphorylation. [2][3][4] Owing to the growing awareness of the toxicity of copper at elevated concentrations, searching for effective analytical methods in general, and for optochemical sensors in particular, for the copper assay is of considerable interest.The recent years have seen a growing interest in the development of optical chemical sensors for Cu 2+ with different chemical transducers. [5][6][7][8][9] Thus optochemical sensors can offer advantages in terms of size, cost, not requiring a reference element, and transmitting without the influence of an electromagnetic field. Most of these optodes are based on absorption or reflectance measurements of immobilized colorimetric reagents in various matrices. Although fluorescence signaling offers the advantage of high sensitivity over absorption or reflectance signaling, only a few optical sensors based on fluorescence are reported for Cu 2+ determination. 10-12 These fluorescence sensors are commonly composed of two structural subunits: a fluorophore (for signal transduction) and an ionophore (for selective recongnition of metal ion). The two subunits are connected through a linking bridge. The fluorescence of the fluorophore would be affected when the ionophore recognizes some metal ions as a result of electron or energy transfer. 13,14 Searching for new fluorescence sensors which would respond toward Cu 2+ with sufficient high selectivity is still an active field as well as a challenge for the analytical chemistry research. [15][16][17][18][19] Porphyrins are a class of naturally occurring macrocyclic compounds, which play a very important role in the metabolism of living organisms. Moreover, porphyrins show good photophysical properties with large Stokes shifts and relatively long excitation (>400 nm) and emission (>600 nm) wavelengths that minimize the effects of the background fluorescence. This makes porphyrin derivatives potential fluorophores for preparation of new fluorescence molecular sensors. In the present study, a porphyrin derivative appended with bipyridine (H2TPPBPy) was chosen for preparation of a Cu 2+ -sensitive optical chemical sensor. H2TPPBPy has been used to investigate the rate of photoinduced charge separation. 20 Quenching of porphyrin fluorescence on irradiation is attributed to electron transfer from porphyrin to the acceptor (rhenium), which is linked with the porphyrin by bipyridine. It is interesting to explore the possibility of using a similar approach in designing the Cu 2+ -sensitive optical chemical sensor. Bipyridine coordination of Cu 2+ would quench the fluorescence of porphyrin. In this study, a sensor based on H2TPPBPy was first reported. T...

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A highly versatile stable optical sensor based on 4-decyloxy-2-(2-pyridylazo)-1-naphthol in Nafion for the determination of copper

Cited by 33 publications

References 17 publications

Nickel(II) Selective PVC‐Based Membrane Sensor Using a Schiff Base

Nickel(II) Selective PVC‐Based Membrane Sensor Using a Schiff Base

PAR immobilized colorimetric fiber for heavy metal ion detection and adsorption

An Optode Sensor for Cu2+ with High Selectivity Based on Porphyrin Derivative Appended with Bipyridine

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