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ERIC Number: EJ1062305
Record Type: Journal
Publication Date: 2015-Apr
Pages: 5
Abstractor: As Provided
Reference Count: 7
ISSN: ISSN-0021-9584
Decay Kinetics of UV-Sensitive Materials: An Introductory Chemistry Experiment
Via, Garrhett; Williams, Chelsey; Dudek, Raymond; Dudek, John
Journal of Chemical Education, v92 n4 p747-751 Apr 2015
First-order kinetic decay rates can be obtained by measuring the time-dependent reflection spectra of ultraviolet-sensitive objects as they returned from their excited, colored state back to the ground, colorless state. In this paper, a procedure is described which provides an innovative and unique twist on standard, undergraduate, kinetics experiments. Specifically, UV-sensitive beads and threads are utilized as the time changing system, as opposed to more conventional wet chemical systems. The spectral data is collected and analyzed by the students during a standard laboratory session, and the class results are pooled so that the reflection spectra and decay curves of all colors for both UV sensitive beads and threads can be compared. This new approach to a kinetics experiment increases student interest in a safe, inexpensive, and environmentally friendly way.
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; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A