JCE Online Journal of Chemical Education
 | Subscriptions  | Software Orders  | Support  | Contributors  | Advertisers  | 

JCE Print
   Current Issue
 Previous Issues
 Supplements
 Search JCE Index

JCE Digital Library
   DigiDemos
 QBank
 SymMath
 WebWare

JCE Software
   Latest Releases
 Software & Video
 Downloads
 Support

Only@JCE Online
   JCE Online Store
 JCE HS CLIC
 JCE Discussion Forums
   Biographical Snapshots
 ChemEd Resource Shelf
 Featured Molecules
 Hal's Picks
 Project Chemlab
 Reviewed WWW Sites
 "Web-Ed" Articles

About JCE
   Features
 Publications
 Operations
 Outreach
 Contact Us


  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > February  >
In the Classroom
Colorful Azulene and Its Equally Colorful Derivatives
Robert S. H. Liu
Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822-2275
Cover
February 2002
Vol. 79 No. 2
p. 183
Abstract
A simple pictorial method using HOMO, LUMO, and LUMO+1 of azulene coupled with interaction between the electrons in the singly occupied orbitals is introduced to show how the S2-S0 energy gap relative to the S1-S0 gap can be changed by a choice of substituents. The result is changing the characteristic blue color of azulene to an array of other colors: emerald green for 1,3-difluoroazulene, magenta for azulene-1-carboxaldehyde, and red for azulene-1,3-dicarboxaldehyde.
Supplement
The PDF version of this article presents Figures 1 and 4 in color.
More Information
*  Citation
 Liu, Robert S. H. J. Chem. Educ. 2002 79 183.
*  Keywords
 Excited States / Energy Transfer; MO Theory; Organic Chemistry; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 January 2, 2002
March 16, 2005
<< Previous Article Table of Contents Next Article >>
  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > February  > Page 183


Subscriptions
 Subscription Info
 Order Forms

JCE HS CLIC

Our Secondary School editors work hard to distill all the JCE materials to produce a fraction of particular interest to high school teachers. We call it CLIC.
 JCE HS CLIC

Contributions Welcome
JCE welcomes your submission
 Contributors' Corner

Advertisers
In recent years we have worked hard to better match our advertisers with our readers. When shopping for chemistry education materials, visit our advertisers' WWW sites first.
 Recent Advertisers

Be An Ambassador
Take JCE along on your outreach missions. Copies of the Journal, guest access to JCE Online, our publications catalog, and more are available for your participants.
 Outreach with JCE

Comments to
jceonline@chem.wisc.edu		 Copyright © Division of Chemical Education, Inc., American Chemical Society.
All rights reserved.