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Solvent Swelling and Optical Rotation Demonstrated on the Overhead Projector
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Abstract
Reversible solvent swelling of the transparent elastomer polydimethylsiloxane (PDMS) with organic solvents can be shown on an overhead projector. Evaporation of the solvents from a swollen slab of PDMS can result in dramatic crack formation throughout the slab. Use of optically active solvents such as the (R)-(+) and (S)-(-) enantiomers of limonene results in the solvent-swollen slab of PDMS having optical activity that can be shown using an overhead projector.
Keywords (Audience):
Second-Year UndergraduateKeywords (Domain):
DemonstrationsKeywords (Feature):
Overhead Projector DemonstrationsKeywords (Subject):
Chirality / Optical ActivityCiting Articles
Citation data is made available by participants in CrossRef's Cited-by Linking service. For a more comprehensive list of citations to this article, users are encouraged to perform a search in SciFinder.
This article has been cited by 4 ACS Journal articles (4 most recent appear below).
Fabrication and Analysis of Photonic Crystals
Younan Xia , Dean J. Campbell and Kylee E. KorteJournal of Chemical Education2007 84 (11), 1824Fabrication and Analysis of Photonic Crystals
Younan Xia , Dean J. Campbell and Kylee E. KorteJournal of Chemical Education2007 84 (11), 1824These laboratory experiments are designed to explore aspects of nanoscale chemistry by constructing and spectroscopically analyzing thin films of photonic crystals. Films comprised of colloidal spheres and polydimethylsiloxane exhibit diffraction-based ...
Powder Diffraction Simulated by a Polycrystalline Film of Spherical Colloids
Younan Xia , Dean J. Campbell , George C. LisenskyJournal of Chemical Education2006 83 (11), 1638Powder Diffraction Simulated by a Polycrystalline Film of Spherical Colloids
Younan Xia , Dean J. Campbell , George C. LisenskyJournal of Chemical Education2006 83 (11), 1638This article describes a simple way to demonstrate powder diffraction in a classroom setting using a dry film of spherical colloids on a glass substrate. Use of transparent, elastomeric poly(dimethylsiloxane) as a supporting substrate for the spheres ...
Correction
Journal of Chemical Education2001 78 (2), 165Correction
Journal of Chemical Education2001 78 (2), 165
Solvent Swelling Demonstrations: Possible Extension to Other Types of Material
J. C. JonesJournal of Chemical Education2001 78 (2), 165Solvent Swelling Demonstrations: Possible Extension to Other Types of Material
J. C. JonesJournal of Chemical Education2001 78 (2), 165Demonstrating the solvent-induced swelling of rank coal (lignite).
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History
- Received: August 03, 2009
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