Novel Ytterbium Complexes of Two Calix[4]resorcinarenes

Shevchuk, Sergey V.; Русакова, Н. В.; Turianskaya, Anna M.; Korovin, Yurii V.; Nazarenko, N.A.; Gren, A. I.; Shapiro, Yurii E.

doi:10.1039/a703834h

Cited by 6 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spectral properties of some chelates of these ions with porphyrins (), azo compounds ( − ), calixarenes (), and macrocyclic compounds ( − ) have been studied, and an Yb(III) chelate has been described as a label in a qualitative immunoassay method for human chorionic gonadotropin (). The scarce analytical applicability of these ions can be ascribed in part to the fact that the luminescence of their chelates in solution is strongly influenced by some factors such as dissolved oxygen or −OH oscillator vibrations ( , ).…”

Section: Introductionmentioning

confidence: 99%

“…Eu(III) and Tb(III) ions, which emit green and red light, have been extensively used for analytical purposes (1,2), but other lanthanide ions such as Yb(III), Nd(III), and Er(III), which emit in the near-infrared (NIR) region, have been scarcely described as analytical reagents. The spectral properties of some chelates of these ions with porphyrins (3), azo compounds (4-7), calixarenes (8), and macrocyclic compounds (9)(10)(11)(12) have been studied, and an Yb(III) chelate has been described as a label in a qualitative immunoassay method for human chorionic gonadotropin (13). The scarce analytical applicability of these ions can be ascribed in part to the fact that the luminescence of their chelates in solution is strongly influenced by some factors such as dissolved oxygen or -OH oscillator vibrations (5,8).…”

Section: Introductionmentioning

confidence: 99%

“…This approach can minimize the potential interference of some background signals. The system is developed in aqueous solution, avoiding the presence of organic solvents such as dimethyl sulfoxide or dimethylformamide, which have been used to obtain luminescence signals of several Yb(III) complexes previously reported (8). The high initial rate of the Yb(III)-sulfite complex is automatically measured using a stopped-flow mixing technique, which also allows the automatic mixing of the reactants.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Usefulness of Ytterbium(III) as Analytical Reagent for Total Sulfite Determination in White Wine Samples

Rodríguez-Díaz

Aguilar-Caballos

Gómez‐Hens

2004

J. Agric. Food Chem.

View full text Add to dashboard Cite

Ytterbium(III) is used as reagent for the determination of sulfite by measuring the formation of the Yb(III)-sulfite complex through the variation of the light scattering intensity with time. The low solubility of this complex causes an efficient dispersion of the radiation at 490 nm, which is measured at 980 nm. Each kinetic datum is automatically obtained in only 0.5 s by stopped-flow mixing technique. The application of the initial rate method using a long emission wavelength minimizes the potential interference of fluorescent background signals from the sample matrix. The dynamic range of the calibration graph is 1-250 microg/mL, and the calculated detection limit is 0.35 microg/mL. The precision, expressed as relative standard deviation, is <6%. The method has been applied to the determination of total sulfites in white wine samples, which requires only the sample dilution and the use of two aliquots to improve selectivity. However, the matrix effect found for red wines precludes the application of the method to the direct analysis of these samples. Analytical recoveries ranged from 96.0 to 106.7%. The results obtained with the proposed method agreed with those provided by the p-rosaniline method. Unlike this method, in which toxic reagents are required, the use of ytterbium(III) as analytical reagent shows the advantage of its low acute toxic rating.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Usefulness of Ytterbium(III) as Analytical Reagent for Total Sulfite Determination in White Wine Samples

Rodríguez-Díaz

Aguilar-Caballos

Gómez‐Hens

2004

J. Agric. Food Chem.

View full text Add to dashboard Cite

show abstract

“…10 ‡ The complexes of Ln III ions with compounds 1-5 were synthesized as described previously. 9 From elemental analysis data the composition of Ln III complexes with compounds 1-5 was equal to 1:1. The Ln III content was determined by a complexometric method with Arsenazo III as indicator.…”

mentioning

confidence: 99%