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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > September  >
In the Classroom
Teaching Molecular Applications of the Particle-in-a-Ring Model Using Azulene
Miguel A. R. B. Castanho
Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, and Centro de Química Física Molecular, Instituto Superior Técnico, Lisboa, Portugal
Cover
September 2002
Vol. 79 No. 9
p. 1092
Abstract
A particle in a box is a model widely used to bridge theoretical and experimental fields in introductory physical chemistry courses. Azulene is proposed as a model compound for an application as a particle in the ring—that is, a two-dimensional circular model. Students calculate the expected transition wavelength and compare this value with the absorption spectrum. The expected wavelength, λ, is 314 nm, within the range of the experimental absorption spectrum. Some caution is advised during data analysis. Azulene fluorescence and color enable extended work on the quantum mechanics and spectral characteristics of this molecule.
More Information
*  Citation
 Castanho, Miguel A. R. B. J. Chem. Educ. 2002 79 1092.
*  Keywords
 Molecular Properties / Structure; Physical Chemistry; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 August 12, 2002
March 16, 2005
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