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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > May  >
In the Classroom
Tested Demonstrations
Light Emission at Electrodes: An Electrochemiluminescence Demonstration
Ed Bolton and Mark M. Richter
Department of Chemistry, Southwest Missouri State University, Springfield, MO 65804
Cover
May 2001
Vol. 78 No. 5
p. 641
Abstract
Electrochemiluminescence involves the production of light near an electrode surface by the generation of species that can undergo highly energetic electron transfer reactions. A demonstration is presented that uses Ru(bpy)32+ (bpy = 2,2'-bipyridine) as the light-emitting molecule and tri-n-propylamine (C9H21N) as a coreactant (i.e., a species capable of generating a strong reductant upon oxidation). Upon application of a 3-volt potential to a platinum electrode immersed in a Ru(bpy)32+-C9H21N solution, an orange glow, readily visible in a semidarkened room, is produced at the electrode.
More Information
*  Citation
 Bolton, Ed; Richter, Mark M. J. Chem. Educ. 2001 78 641.
*  Keywords
 Demonstrations; Electrochemistry; Excited States / Energy Transfer; Luminescence; Teaching / Learning Aids
*  History
 Created:
Last Updated:		 March 22, 2001
August 31, 2005
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