Solvent Swelling and Optical Rotation Demonstrated on the Overhead Projector

• Dean J. Campbell ^[1] ; Sarah B. Rupe ^[1]
  1. [1] Bradley University

     Bradley University

     Township of Peoria City, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 77, Nº 7 (July), 2000, págs. 876-876
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • 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.