Improved detection of salicylic acids using terbium-sensitized luminescence in aqueous micellar solutions of cetyltrimethylammonium chloride

Arnaud, Nadine; Georges, Joseph

doi:10.1039/a902195g

Cited by 45 publications

(25 citation statements)

References 22 publications

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“…Terbium(III) ions can form stable complexes or chelates with various organic ligands and undergo intramolecular energy transfer through the triplet state of the ligand to the emitting level of the lanthanide ion [13]. It has been also reported that the fluorescence intensity of Tb(III) is enhanced in the presence of cationic (e.g., cetyltrimethylammonium bromide) [14] or anionic (e.g., sodium dodecyl sulfate and sodium dodecylbenzene sulfonate) [10,15] surfactants.…”

Section: Introductionmentioning

confidence: 97%

Effect of terbium(III) chloride on the micellization properties of sodium decyl- and dodecyl-sulfate solutions

Neves

Valente

Burrows

et al. 2007

Journal of Colloid and Interface Science

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The effect of TbCl 3 on the aggregation processes of the anionic surfactants sodium decyl sulfate (SDeS) and sodium dodecyl sulfate (SDS) has been investigated. Electrical conductivity data, combined with Tb(III) luminescence measurements suggest that the formation of micelles involving TbCl 3 and SDS occurs at concentrations below the critical micelle concentration (cmc) of the pure surfactants; the formation of these mixed aggregates was also monitored by light scattering, which indicates that the addition of TbCl 3 to surfactant concentration at values below the pure surfactant cmc results in a much greater light scattering than that found with pure sodium alkylsulfate surfactant micelles. This phenomenon is dependent upon the alkyl chain length of the surfactant. With Tb(III)/DS − , complexes are formed with a cation/anion binding ratio varying from 3 to 6, which depends upon the initial concentration of Tb(III). This suggests that the majority of the cation hydration water molecules can be exchanged by the anionic surfactant. When the carbon chain length decreases, interactions between surfactant and Tb(III) also decrease, alterations in conductivity and fluorescence data are not so significant and, consequently, no binding ratio can be detected even if existing. The surfactant micellization is dependent on the presence of electrolyte in solution with apparent cmc being lower than the corresponding cmc value of pure SDS.

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Section: Introductionmentioning

confidence: 97%

Effect of terbium(III) chloride on the micellization properties of sodium decyl- and dodecyl-sulfate solutions

Neves

Valente

Burrows

et al. 2007

Journal of Colloid and Interface Science

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“…2, 4 The spectrum of the Tb 3+ complex was identified by peaks at about 490, 545, 590 and 620 nm (wavelengths of the 5 D4 → 7 F6, 5 D4 → 7 F5, 5 D4 → 7 F4, and 5 D4 → 7 F3 transition, respectively), as shown in Fig. 3(b).…”

Section: Figs 3(a) -(E)mentioning

confidence: 99%

“…3(b). 4 A grain of marker with a particle diameter of several tens of micrometers was sufficient for these nondestructive analyses. The broad bands at approximately 450 and 415 nm in the spectra shown in Figs.…”

Section: Figs 3(a) -(E)mentioning

confidence: 99%

“…However, these masking agents exhibit small Stokes shifts and fluorescence emissions with a broad monotonous peak, whereas the Eu 3+ and Tb 3+ complexes exhibit large Stokes shifts and a fluorescence emission with multiple characteristic narrow peaks. [3][4][5] The combination of ultraviolet (UV) light and fluorescence spectrometer clearly distinguishes the Eu 3+ and Tb 3+ complexes from the visible photoluminescent compounds available in the living area. Eu 3+ and Tb 3+ complexes have been prepared by many researchers in various fields, and characteristically emit red and green luminescence under UV light at approximately 365 nm, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Eu 3+ and Tb 3+ complexes have been prepared by many researchers in various fields, and characteristically emit red and green luminescence under UV light at approximately 365 nm, respectively. [3][4][5][6][7][8][9][10][11][12][13][14][15] The retina of the human eye has three types of receptors: one for red, one for green, and one for blue light, and receives a mixture of two colors to form another color of light. For example, it forms yellow from red and green, magenta from red and blue, and cyan from green and blue.…”

Section: Introductionmentioning

confidence: 99%

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Development of Micromarkers with Various Photoluminescence Colors as Tracers for Shadowing Pursuits

2008

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Micromarkers with five photoluminescence colors were developed as tracers for shadowing pursuits. The markers are colorless powders with particle diameters of several tens to several hundreds of micrometers, prepared using a cryogenic sample crusher. They were visualized using red, green, yellow, magenta or cyan photoluminescence under ultraviolet light at approximately 365 nm. The markers were composed of photoluminescent compounds dispersed in polyvinyl butyral. The photoluminescent compounds in the polyvinyl butyral were stable under ambient conditions for more than one year after application. The compounds with the red, green, yellow, magenta and cyan photoluminescence contained a europium (Eu 3+ ) complex, a terbium (Tb 3+ ) complex, a mixture of Tb 3+ and Eu 3+ complexes, a mixture of Eu 3+ complex and o-coumaric acid, and a mixture of Tb 3+ complex and 7-hydroxycoumarin along with a few drops of a sodium bicarbonate aqueous solution, respectively. Neodymium (Nd 3+ ) and ytterbium (Yb 3+ ) complexes with photoluminescence in the near-IR wavelength region can also be added to these visible photoluminescent compounds as secret markers for discrimination. The markers were non-destructively identified using a microscopic FT-IR spectrometer and a microscopic spectrometer equipped with a fluorescence detector.

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Fluorescence in Organized Assemblies

Hinze¹

2000

Encyclopedia of Analytical Chemistry

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This article provides an overview of the general properties of organized assembly (ordered media) systems such as aqueous surfactant and bile salt micelles, lipid and surfactant vesicles (liposomes) and cyclodextrins (CDs) and summarizes their utilization to enhance the performance of analytical fluorescence measurements. In many instances, organic molecules and metal complex species, when included within a CD cavity or solubilized and bound to surfactant aggregates, exhibit enhanced fluorescence. This gives rise to improved detectability of such analytes. The altered microenvironment within the organized medium is capable of impeding the interfering action of other species (inorganic or organic) present in the sample matrix. This often can improve the selectivity of the analytical method. These benefits of improved sensitivity and selectivity arise from the compartmentalization, isolation and shielding of the excited singlet state of the guest analyte from quenching and nonradiative decay processes as well as prevent side reactions that otherwise can occur in bulk solution (or sample matrix). In addition, organic solvents or time‐consuming extraction steps can be avoided owing to the increased solubility of the nonpolar organic or inorganic reagents and/or analyte molecules in water in the presence of the organized medium; allowing for the use of an aqueous medium to perform the procedure. The possibility of conducting reactions and forming fluorescent organic or metal chelates in micellar (or other organized) media that are not observed in a bulk homogeneous solvent system serves to expand the scope of chemistries that one can consider using to design/develop new, unique and improved fluorescent assays. Numerous representative examples of fluorescent methods for determination of both organic and inorganic analytes are provided which serve to illustrate the advantages and benefits accrued from the use of the micelles, vesicles, liposomes or CDs in such procedures. Some experimental considerations and cautions to keep in mind when utilizing organized media are also delineated. An extensive reference section is provided so that the interested reader can easily refer to such for more detailed information on these systems and topics.

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Improved detection of salicylic acids using terbium-sensitized luminescence in aqueous micellar solutions of cetyltrimethylammonium chloride

Cited by 45 publications

References 22 publications

Effect of terbium(III) chloride on the micellization properties of sodium decyl- and dodecyl-sulfate solutions

Effect of terbium(III) chloride on the micellization properties of sodium decyl- and dodecyl-sulfate solutions

Development of Micromarkers with Various Photoluminescence Colors as Tracers for Shadowing Pursuits

Fluorescence in Organized Assemblies

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