Supersonic jet/synchronous scan luminescence spectrometry

Abstract

Supersonic Jet spectrometry Is combined with synchronous scan luminescence spectrometry; the fluorescence wavelength Is synchronously scanned with the excitation wavelength. When the wavelength difference Is adjusted to 0 nm, a single component gives a single peak In most cases, like chromatography. The resolving power, the ratio of the dynamic range and the line width, is 2.5 X 10\ which corresponds to chromatography having a theoretical plate of 1010.

Suppression of background emission from high vibrational levels in the excited state through vibronic mixing in supersonic jet spectrometry by using synchronous scan luminescence

“…A Nd:YAG-laser-pumped dye laser (Quantel, YG581C-20, TDL50, UVX-2, DCC-3) was used for sample excitation. The vacuum system and the synchronous scan luminescence detection system are reported in detail elsewhere (9)(10)(11) and are briefly described here. For recording an excitation spectrum, fluorescence is collected by a quartz lens (focal length, 3 cm) onto a photocathode of photomultiplier 1 (Hamamatsu, R1477) after passing it through a color filter (cutoff wavelength, 350 or 317 nm) to discriminate against scattered light of the laser emission.…”

“…To overcome this problem, SSJ spectrometry is combined with synchronous scan luminescence spectrometry monitoring resonance fluorescence (R-SSL). As already reported, this approach is useful for simplification of the SSJ spectrum and is useful for discrimination between closely related compounds (9,10). In this work, conventional SSJ spectrometry is first applied to two sample mixtures consisting of anthracene (three aromatic rings) and ß-naphthol (two aromatic rings) and of 2-methylnaphthalene (two aromatic rings) and m-toluidine (one aromatic ring).…”

Critical assessment: Use of supersonic jet spectrometry for complex mixture analysis (IUPAC Technical Report)

“…These compounds are numerous, and a simple spectrum is desirable, hopefully one giving a single peak for each component. Synchronous scan luminescence spectrometry combined with supersonic jet spectrometry detecting either only resonance fluorescence (∆λ = 0 nm) or nonresonance fluorescence (∆λ ≠ 0 nm) can be used for the measurement of a mixture containing many polycyclic aromatic hydrocarbons [40,41]. The former gives a single peak for a single component in most cases, and the latter gives numerous peaks for each component.…”

The Science of Luminescence

“…This approach generates a single two-dimensional slice through an EEM surface (90) and is especially useful for rapid screening analyses of complex mixtures. Synchronous scan luminescence spectrometry has recently been used in combination with a supersonic jet expansion (91). By setting the wavelength difference to zero, a characteristic single very sharp emission line was obtained for each component in a mixture of seven polyaromatic hydrocarbons.…”