Ruthenium 2,2´-Bipyridine Complexes as Fluorescent Oxidation-Reduction Indicators.

Kratochvil, Byron; Zatko, David A.

doi:10.1021/ac60209a060

Cited by 17 publications

(6 citation statements)

References 6 publications

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“…Compound 191 was the first supramolecular electrocontrolled luminescence switch. Simpler molecular versions are available within classical luminescent redox indicators such as tris(2,2‘-bipyridyl)ruthenium(II) which need higher potentials for successful operation . The third member of this trilogy is Daub's 192 because, in contrast to 190 and 191 , metal centers are abandoned altogether with no sacrifice of concept or loss of performance.…”

Section: B “On−off” Switches Using Redox-active Guestsmentioning

confidence: 99%

Signaling Recognition Events with Fluorescent Sensors and Switches

et al. 1997

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Section: B “On−off” Switches Using Redox-active Guestsmentioning

confidence: 99%

Signaling Recognition Events with Fluorescent Sensors and Switches

et al. 1997

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“…The absence of any lead response under these conditions might be attributed, in principle, to slow reaction kinetics in the oxidation process. This assumption is supported by the work of Krakochvil (7), who proved that, in the organic phase, processes occur slowly. For this reason, the time of reaction between the lead and the oxidant added for plumbane generation was studied.…”

Section: Methodsmentioning

confidence: 79%

“…Subsequently, a number of "copycat" incidents occurred, involving such things as strychnine, mercuric chloride, and sodium hydroxide in capsules, hydrochloric acid in eyedrops, and sodium fluoride in an artificial sweetner (2)(3)(4). Concern about drug tampering has continued to grow; earlier this year cyanide-laced Tylenol capsules caused the death of a woman in the New York area (5, 6), and even more recently Excedrin capsules containing cyanide resulted in two further fatalities in the Seattle area (7).…”

mentioning

confidence: 99%

Behavior of several lead compounds in organic medium with a hydride generator. Direct determination of lead in gasoline

Nerín¹,

Olavide²,

Cacho³

1987

Anal. Chem.

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A study was carried out with atomic absorption spectrometry (AAS), using a silica tube, to determine whether lead hydride could be generated In organic medium, using solvents N,Ndimethylformamlde, formamide, and dimethyl sulfoxide. Pb-(N03)2 was used as a standard of Pb(II) and Pb02, Pb(C2-H302)4, and PbR4 (where R = CH3 or C2H5) were used as standards for Pb(IV). It was found that even with wide ranges of NaBH4 concentrations, type and concentration of the acid medium, and various oxidants, no plumbane Is generated. However, the hydrogen given out In the decomposition of NaBH4 carries the tetraalkyl compound to the silica tube. This tetraalkyl compound can be carried to the silica tube by C02, generated In situ by adding NaHCOg In acid medium, Instead of using NaBH4. This permits the determination of volatile organometallic lead. The optimal conditions for direct volatilization of PbR4, delivery to the silica tube, and AAS measurement were determined. The detection limit was found to be 17 ppb of Pb In a 20-mL sample. The relative standard deviation Is 2.31 %. Pb was directly determined In several gasoline samples.The widespread use of organometallic compounds as antiknock agents in gasolines has added considerably to the amount of lead in the environment. This element, whose toxicity is well-known, is found in the environment in many different forms: lead oxide, metallic lead, and different alkyllead compounds.Methods have been developed for speciating alkyllead derivatives. Messman et al. (!) used a combination of liquid chromatography and atomic absorption spectrometry (AAS) to differentiate between tetramethyl-, trimethylethyl-, dimethyldiethyl-, methyltriethyl-, and tetraethyllead compounds in gasoline, and Walter et al.(2) combined gas chromatography and AAS to analyze these compounds independently.

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“…Oxacyanine and thiacyanine dyes serve as fluorescent indicators in the cyanometric titration of silver halides (35). Ruthenium 2-2'-bipyridine complexes are successful as fluorescent oxidation-reduction indicators (246). The sodium salt of 2,7-dichlorofluorescein gives a distinct fluorescent color change from green to rose when used to determine potassium with sodium tetraphenyl borate and cetyltrimethyl ammonium bromide (192).…”

Section: Berylliummentioning

confidence: 99%

Fluorometric Analysis

White¹,

Weissler²

1966

Anal. Chem.

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This review coversthe two-year period from approximately December 1963 {465) to December 1965. Bozhevol'nov {56) has published a review on the luminescence of inorganic substances with 172 references and on fluorescence analysis for the determination of inorganic trace impurities in high purity substances {57).Shcherbov {388) has published a 259page book with 681 references on the use of fluorometry in the chemical analysis of mineral raw materials. Topics included are: general considerations, basic laws, apparatus, reagents

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Ruthenium 2,2´-Bipyridine Complexes as Fluorescent Oxidation-Reduction Indicators.

Cited by 17 publications

References 6 publications

Signaling Recognition Events with Fluorescent Sensors and Switches

Signaling Recognition Events with Fluorescent Sensors and Switches

Behavior of several lead compounds in organic medium with a hydride generator. Direct determination of lead in gasoline

Fluorometric Analysis

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