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  Home > JCE Print > Journal of Chemical Education > Issues > 1997  > November  >
In the Laboratory
An Easy and Cheap Flash Spectroscopy Experiment
Mauro Maestri, Roberto Ballardini, Fernando Jorge Silva Pina, and Maria João Melo
Dipartimento di Chimica "G. Ciamician" dell'Università, 40126, Bologna, Italy
Cover
November 1997
Vol. 74 No. 11
p. 1314
Abstract
In this work we applied a flash photolysis technique to the study of the kinetic behavior of a synthetic flavylium salt in aqueous solution. The kinetic processes triggered by the light pulse of a common camera flash, are followed by means of a sligthly modified, computer controlled, spectrophotometer. Light induces reversible absorbance changes and two different transient species are evidenced prior the full recovery of the system. The kinetic behavior and the spectra of the transient species are reported. The proposed experiment is cheap and easy and allows students of all levels to become familiar with the concepts of transient decay kinetics and time resolved spectra.
More Information
*  Citation
 Maestri, Mauro; Ballardini, Roberto; Pina, Ferando Jorge Silva; Melo, Maria Joao. J. Chem. Educ. 1997 74 1314.
*  Keywords
 Instrumental Methods, Laboratory, Kinetics, Mechanisms, Photochemistry, and UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 July 26, 1999
June 23, 2005
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