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ERIC Number: EJ921282
Record Type: Journal
Publication Date: 2010-Dec
Pages: 4
Abstractor: As Provided
Reference Count: 14
ISSN: ISSN-0021-9584
A Better Sunscreen: Structural Effects on Spectral Properties
Huck, Lawrence A.; Leigh, William J.
Journal of Chemical Education, v87 n12 p1384-1387 Dec 2010
A modification of the mixed-aldol synthesis of dibenzylideneacetone, prepared from acetone and benzaldehyde, is described wherein acetone is replaced with a series of cyclic ketones with ring sizes of 5-7 carbons. The structural variations in the resulting conjugated ketones produce regular variations in the UV-vis absorption spectra. The choice of the best sunscreen agent based on these variations is straightforward, and by considering simple molecular orbital diagrams in the context of the molecular geometries, students can go the next step and understand why the variation occurs. (Contains 2 tables and 3 figures.)
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:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A