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  Home > JCE Print > Journal of Chemical Education > Issues > 1997  > November  >
In the Laboratory
Visible Spectra Conjugated Dyes: Integrating Quantum Chemical Concepts with Experimental Data
George M. Shalhoub
Department of Chemistry and Biochemistry, La Salle University, Philadelphia, PA 19141
Cover
November 1997
Vol. 74 No. 11
p. 1317
Abstract
The visible spectra of the conjugated dyes pinacyanol chloride, 1-1'-diethyl-2,2'-cyanine iodide, and 1-1'-diethyl-2,2'-dicarbocyanine iodide are measured. Molar absorptivities and integrated absorption coefficients are then determined by deconvolution of the spectra. The absorption coefficients are used to calculate Einstein coefficients, oscillator strengths, and transition moment integrals of the dyes. Theoretical values for the Einstein coefficients, oscillator strengths, and transition moment integrals are predicted using the one - dimensional box model. Comparisons between theoretical and experimental values are made and the model is parameterized to improve agreement.
More Information
*  Citation
 Shalhoub, George M. J. Chem. Educ. 1997 74 1317.
*  Keywords
 Physical Chemistry, UV-Vis Spectroscopy, and Quantum Chemistry
*  History
 Created:
Last Updated:		 July 26, 1999
June 23, 2005
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