Singlet-triplet energy difference as a parameter of selectivity in synchronous phosphorimetry

Vo-Dinh, T.; Gammage, R.B.

doi:10.1021/ac50036a029

Cited by 64 publications

(33 citation statements)

References 21 publications

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“…35 Synchronous methodology has been proposed as a means for increasing the selectivity of phosphorimetry, due to its associated band-narrowing effect. 36 A synchronous phosphorescence scan gives a narrow and simpler spectrum compared to the conventional excitation/emission spectrum. Therefore it is more effective for separating two overlapping spectra.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Carbaryl and 1-Naphthol by First-Derivative Synchronous Non-Protected Room Temperature Phosphorescence

Machicote

Bruzzone

2009

ANAL. SCI.

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The applicability of non-protected room temperature phosphorescence (NP-RTP) in real samples was demonstrated in the present work. In this methodology, only two reagents, potassium iodide and sodium sulfite, were used to obtain phosphorescent signals. Overlapping of the phosphorescence spectra was resolved by using first-derivative synchronous phosphorimetry. The synchronous first-derivative spectra of carbaryl and 1-naphthol in the mixture were completely separated by changing the synchronous wavelength interval; with 240 nm the first-derivative spectra of carbaryl were recorded, while with 200 nm those of 1-naphthol appeared. The intensities in the spectra were proportional to the concentration of carbaryl and 1-naphthol. The calibration graphs were linear up to at least 1.1 ¥ 10 -5 mol L -1 for carbaryl and 1.3 ¥ 10 -5 mol L -1 for 1-naphthol, and the correlation coefficients were 0.9971 and 0.9932, respectively. Carbaryl and 1-naphthol were successfully determined by the proposed method in a hydrolyzed sample of a commercial formulation.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Carbaryl and 1-Naphthol by First-Derivative Synchronous Non-Protected Room Temperature Phosphorescence

Machicote

Bruzzone

2009

ANAL. SCI.

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“…This methodology, synchronously scanned luminescence (24)(25), is based upon selection of a wavelength difference which corresponds to the difference in energies between a prominent absorption and a prominent luminescence transition for a particular species. By simultaneously scanning both excitation and emission while maintained this fixed wavelength difference between the two light beams, it is possible to produce spectra that are much less complicated.…”

Section: Synchronously Scanned Luminescencementioning

confidence: 99%

“…For a single compound, the spectrum can be as simple as a single slightly narrowed peak (24,25) instead of the band rich spectra produced by other dispersed luminescence techniques.…”

Section: Synchronously Scanned Luminescencementioning

confidence: 99%

“…The increased luminescence structure for mixtures which is produced by the simplified spectra of each component has been used to demonstrate the presence of a compound in an unseparated natural mixture (25). Also the individual species in a few five and six component artificial mixtures have been resolved and quantitated (24,25).…”

Section: Synchronously Scanned Luminescencementioning

confidence: 99%

“…However, the energy differences between strong transitions turn out to be shared by many PAH species due to structural and thus vibrational similarities (25). This and the still broad bands result in many interferences in any complex mixture (26 (27)(28)(29).…”

Section: Synchronously Scanned Luminescencementioning

confidence: 99%

See 2 more Smart Citations

Fluorescence line narrowing spectrometry of polycyclic aromatic hydrocarbons in organic glasses

Brown

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Luminescence in Environmental Analysis

Campiglia

2000

Encyclopedia of Analytical Chemistry

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An overview of the applications of photoluminescence techniques for the analysis of polycyclic aromatic compounds (PACs) in environmental samples is presented. The basic experimental procedures of several techniques, such as room‐temperature fluorimetry, low‐temperature phosphorimetry (LTP), micelle‐stabilized room‐temperature phosphorimetry (MSRTP), sensitized room‐temperature phosphorimetry (RTP), solid‐surface room‐temperature phosphorimetry (SSRTP), and Shpol'skii spectrometry at 77 K are provided. Analytical figures of merit, such as linear dynamic ranges (LDRs) of calibration curves, limits of detection, and relative standard deviations (RSDs), are compared. Basic spectrofluorimeters for direct laboratory analysis of organic pollutants and instrumental systems utilized for chromatographic detection are discussed. Emphasis to portable devices using laser excitation is given to illustrate the usefulness of photoluminescence techniques for field and remote analysis of contaminated sites. Specific examples of emerging technology developed in the author's laboratory are presented to illustrate recent advances in photoluminescence analysis of environmental samples.

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Singlet-triplet energy difference as a parameter of selectivity in synchronous phosphorimetry

Cited by 64 publications

References 21 publications

Simultaneous Determination of Carbaryl and 1-Naphthol by First-Derivative Synchronous Non-Protected Room Temperature Phosphorescence

Simultaneous Determination of Carbaryl and 1-Naphthol by First-Derivative Synchronous Non-Protected Room Temperature Phosphorescence

Fluorescence line narrowing spectrometry of polycyclic aromatic hydrocarbons in organic glasses

Luminescence in Environmental Analysis

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