Triboluminescent Crystals from the Microwave Oven

David M. Wilhite
Pharmacia Corporation, Kalamazoo, MI 49001
Bruce W. Baldwin
Department of Chemistry, Spring Arbor University, Spring Arbor, MI 49283
J. Chem. Educ., 2002, 79 (11), p 1344
DOI: 10.1021/ed079p1344
Publication Date (Web): November 1, 2002

Abstract

Anthranilic acid was acetylated in a microwave oven (1,000 W) by irradiating for one minute at full power in a 100 mL beaker fitted with a glass funnel as condenser. After cooling, yellow fluorescing crystals were often obtained; but, if not, recrystallization from 10% water–methanol yielded cubes that fluoresced brightly under 360 nm light. Crushing the crystals between two watch glasses in a darkened room demonstrated the triboluminescent effect (i.e., the production of bright blue sparks when the crystals are fractured).

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Organic Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Aromatic Compounds
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  • Received: August 03, 2009

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