ERIC Number: EJ1013548
Record Type: Journal
Publication Date: 2013-Apr
Pages: 3
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
Available Date: N/A
A Demonstration of Simultaneous Electrochemiluminescence
Ibanez, Jorge G.; Zavala-Araiza, Daniel; Sotomayor-Martinez Barranco, Biaani; Torres-Perez, Jonatan; Camacho-Zuniga, Claudia; Bohrmann-Linde, Claudia; Tausch, Michael W.
Journal of Chemical Education, v90 n4 p470-472 Apr 2013
Paired (simultaneous) electrochemical processes can increase energy savings in selected cases by using the reactions at both electrodes of an electrochemical cell to perform a desired process, as is the case in the commercially successful chlor-alkali process. In the demonstration described herein, simultaneous blue electrochemiluminescence (ECL) is obtained with luminol in a basic medium in a divided electrochemical cell. ECL is obtained in the anolyte through the direct oxidation of luminol, the reaction products of which interact with H[subscript 2]O[subscript 2] in the vicinity of the electrode to yield an excited emitting species. ECL is also obtained in the catholyte through an indirect, mediated process involving the initial reduction of ClO[subscript 2] - to ClO-, which then reacts with luminol and H[subscript 2]O[subscript 2] to produce the excited emitting species. The co-reactant (H[subscript 2]O[subscript 2]) is needed to complete the reaction sequences in both compartments of the cell. This ECL phenomenon is visible to the naked eye in a darkened room at a distance of up to 5 m. (Contains 4 figures.)
Descriptors: Science Instruction, College Science, Undergraduate Study, Energy, Molecular Structure, Scientific Concepts, Science Activities, Light
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A
Author Affiliations: N/A