Vapochromic platinum (II) salts


Stephen D. Taylor, taylosd@email.uc.edu1, Robert T. Hart Jr., rhart@shepchem.com2, Jeanette A. Krause, jeanette.krause@uc.edu1, and W. B. Connick, connicwb@email.uc.edu1. (1) Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, OH 45221-0172, (2) Research and Development, The Shepherd Chemical Company, 4900 Beech Street, Norwood, OH 45212
Vapochromic materials, characterized by reversible changes of color and/or emission in the presence of volatile organic compounds (VOCs), are attracting increasing attention because of their utility in chemical sensing applications. Pt(II) salts are of interest in this area because of their tendency to undergo dramatic changes in color due to changes in Pt...Pt separation. Recently we have reported and characterized the vapochromic behavior of Pt(Me2bzimpy)Cl+ (Me2bzimpy=2,6-bis(1-methylbenzimidazol-2-yl)pyridine). This system exhibits a pronounced vapochromic response to polar VOCs, and the sensing selectivity can be tuned by substitution of the counter-anion (e.g., Cl-, PF6-, CF3SO3-). In this presentation, we will discuss the vapochromic behavior of a series of platinum(II) salts and the structural changes that accompany vapor absorption/desorption. Results from UV-visible absorption and emission spectroscopic studies, as well as diffraction experiments, will be presented.

General Inorganic Chemistry
9:00 AM-1:00 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. 219, Oral

Division of Inorganic Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008