Development of a Spectrophotometric Optode for the Determination of Hg(II)

Ensafi, Ali A.; Fouladgar, Masoud

doi:10.1109/jsen.2008.917482

Cited by 20 publications

(8 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the synthesis of the β-ketoiminato palladium(II) complex [Pd(OAc)L] (3), bis(benzoylacetone)diethylenetriamine (1, = LH) [36] was reacted with [Pd(OAc) 2 ] (2) in a 1:1 molar ratio in acetonitrile at ambient temperature for 16 h (eq. (1)).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A β-ketoiminato palladium(II) complex for palladium deposition

Preuß

Korb

Rüffer

et al. 2019

Zeitschrift Für Naturforschung B

View full text Add to dashboard Cite

The β-ketoiminato complex [Pd(OAc)L] (3) can be synthesized by the reaction of bis(benzoylacetone)diethylenetriamine (1, = LH) with [Pd(OAc) 2 ] (2). The structure of 3 in the solid state has been determined by single X-ray diffraction analysis. Complex 3 crystallizes as a dimer (3 2 ), which is formed by hydrogen bonds between NH and O OAc functionalities of two adjacent ligands. Each of the Pd atoms is complexed by one ON 2 donor unit of the polydentate ligand L − and an acetate group. Pd-Pd interactions and hydrogen bond formation between a NH and the C=O acetate moiety lead to a [4 + 2] coordination at Pd. The non-coordinated part of L exists in its β-keto-enamine form. The thermal decomposition behavior of 3 2 was studied by TG (thermogravimetry) and TG-MS showing that 3 2 decomposes between 200 and 500°C independent of the applied atmosphere. Under oxygen PdO is produced, while under argon Pd is formed as confirmed by PXRD measurements. Complex 3 2 was applied as a spin-coating precursor (conc. 0.1 mol L −1 , volume 1.5 mL, 3000 rpm, deposition time 6 min, heating rate 50 K min −1 , holding time 60 min (Ar) and 120 min (air) at T = 800°C). The as-obtained samples are characterized by granulated particles of Pd/PdO on the substrate surface. EDX (energy-dispersive X-ray spectroscopy) and XPS (X-ray photoelectron spectroscopy) measurements confirmed the formation of Pd (Ar) or PdO (O 2 ) with up to 12 mol% C impurity.

show abstract

Section: Resultsmentioning

confidence: 99%

“…All chemicals were purchased from commercial suppliers and were used without any further purification. Bis(benzoylacetone)diethylenetriamine (1) was synthesized according to a previously published method [36].…”

Section: Experimental Section 41 General Proceduresmentioning

confidence: 99%

A β-ketoiminato palladium(II) complex for palladium deposition

Preuß

Korb

Rüffer

et al. 2019

Zeitschrift Für Naturforschung B

View full text Add to dashboard Cite

show abstract

“…This corresponds to saturation of the sensing reagent with analyte. A number of several recent studies have also used logarithm of analyte concentration in constructing calibration curves [31][32][33]. By extending the linear range using a semi-logarithmic scale (Figure 6), a whole range of concentrations between 0.3 and 40 ppm could be accurately measured.…”

Section: Analytical Characteristic Of the Sensormentioning

confidence: 99%

Rapid Determination of Calcium in Milk and Water Samples by Reflectance Spectroscopy

Filik¹,

Aksu²,

Apak³

2011

AJAC

View full text Add to dashboard Cite

Reflectance spectroscopy (RS) can be used as a rapid and sensitive method for the quantitative determination of low amounts of calcium. In this analytical technique, the analyte in complex samples is extracted onto a solid sorbent matrix loaded with glyoxal bis (2-hydroxyanil (GBHA) and then quantified directly on the sorbent surface. The measurements were carried out at a wavelength of 566.1 nm yielding the largest divergence of reflectance spectra before and after reaction with the analyte element. The optimum response was obtained in 0.2 mol⋅L -1 NaOH solution, and the response time of the sensor was about 5 min, depending on the concentration of Ca(II). The calibration curve of Ca(II) was found to be linear on semi-logarithmic scale within the concentration range of 0.3 -40 mg⋅L -1 , with a LOD of 0.15 mg⋅L -1 in the low concentration range. The sensor response from different sensors (n = 5) gave an R.S.D. of 1.4% at 10 mg⋅L -1 Ca(II). The response characteristics of the sensor including dynamic range, reversibility, reproducibility, response time and lifetime are discussed in detail. The main advantages of this prototype device are sensitivity and higher selectivity over Mg(II). The proposed method has been successfully applied to the determination of Ca(II) in milk and drinking water samples.

show abstract

“…So far, many sensors for detecing Hg 2+ have been reported, such as electrochemical sensors 7,8 and fluorescent sensors, [9][10][11][12] however, the former cannot achieve remote monitoring and are not suitable for deep water while the latter have inherent drawbacks since they are influenced by light intensity fluctuations, temperature, and the concentration of indicator. To overcome the shortages mentioned, an optical fiber was adopted to prepare fiber-optic sensors because of its many advantages, including immunity to electromagnetic interference, remote control, small dimensions, light weight, and the potential for multiplexed arrays.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive and selective fiber-optic modal interferometric sensor for detecting trace mercury ion in aqueous solution

Yin

Qian

et al. 2012

Anal. Methods

View full text Add to dashboard Cite

A novel type of fiber-optic mercury ion (Hg 2+ ) sensor was prepared by coating poly (N-ethyl-4vinylpyridinium chloride) (P4VP$HCl) and poly (sodium-p-styrenesulfonate) (PSS) ultrathin film on the surface of a thin-core fiber modal interferometer (TCFMI) with layer-by-layer (LbL) electrostatic self-assembly method. The fabricated TCFMI Hg 2+ sensor exhibits a high selectivity to Hg 2+ and its detection limit and response time are 10 À9 M and 30 s, respectively. The LbL electrostatic self-assembly process is monitored with a quartz crystal microbalance (QCM) and UV-vis spectroscopy for film growth. Atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM) were used to characterize the morphology of the ultrathin film. Both demonstrated nanoporous film, which is helpful in shortening the response time of the TCFMI Hg 2+ sensor.

show abstract

Development of a Spectrophotometric Optode for the Determination of Hg(II)

Cited by 20 publications

References 26 publications

A β-ketoiminato palladium(II) complex for palladium deposition

A β-ketoiminato palladium(II) complex for palladium deposition

Rapid Determination of Calcium in Milk and Water Samples by Reflectance Spectroscopy

Highly sensitive and selective fiber-optic modal interferometric sensor for detecting trace mercury ion in aqueous solution

Contact Info

Product

Resources

About