A versatile method for the determination of photochemical quantum yields: Via online UV-Vis spectroscopy

Eduard Stadler*, Anna Eibel, David Fast, Hilde Freißmuth, Christian Holly, Mathias Wiech, Norbert Moszner, Georg Gescheidt

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung

Abstract

We have developed a simple method for determining the quantum yields of photo-induced reactions. Our setup features a fibre coupled UV-Vis spectrometer, LED irradiation sources, and a calibrated spectrophotometer for precise measurements of the LED photon flux. The initial slope in time-resolved absorbance profiles provides the quantum yield. We show the feasibility of our methodology for the kinetic analysis of photochemical reactions and quantum yield determination. The typical chemical actinometers, ferrioxalate and ortho-nitrobenzaldehyde, as well as riboflavin, a spiro-compound, phosphorus- and germanium-based photoinitiators for radical polymerizations and the frequently utilized photo-switch azobenzene serve as paradigms. The excellent agreement of our results with published data demonstrates the high potential of the proposed method as a convenient alternative to the time-consuming chemical actinometry.

Originalspracheenglisch
Seiten (von - bis)660-669
Seitenumfang10
FachzeitschriftPhotochemical and Photobiological Sciences
Jahrgang17
Ausgabenummer5
DOIs
PublikationsstatusVeröffentlicht - 1 Jan. 2018

ASJC Scopus subject areas

  • Physikalische und Theoretische Chemie

Fingerprint

Untersuchen Sie die Forschungsthemen von „A versatile method for the determination of photochemical quantum yields: Via online UV-Vis spectroscopy“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren