Better View Of Solid-State Reactions | January 4, 2010 Issue - Vol. 88 Issue 1 | Chemical & Engineering News
Volume 88 Issue 1 | p. 26 | Concentrates
Issue Date: January 4, 2010

Better View Of Solid-State Reactions

Using nanocrystals suspended in water, researchers probe the properties solid-state organic reactions using solution spectroscopy techniques
Department: Science & Technology
News Channels: Nano SCENE, JACS In C&EN
Keywords: solid-state reaction, green chemistry, electron paramagnetic resonance
[+]Enlarge
Solid-state conversion of dicumyl ketone to dicumene proceeds through radical-pair intermediates.
8801scon_sch
 
Solid-state conversion of dicumyl ketone to dicumene proceeds through radical-pair intermediates.

Light-driven solid-state organic reactions, while potentially useful for environmentally clean industrial processes, are difficult to probe spectroscopically in fine powders or in single crystals because of high optical densities and light scattering. An international team that includes Malcolm D. E. Forbes of the University of North Carolina, Chapel Hill; Miguel A. Garcia-Garibay of the University of California, Los Angeles; and Valery F. Tarasov of the Semenov Institute of Chemical Physics, in Moscow, has turned to nanocrystals suspended in water as a system that maintains the properties of bulk solids but enables examination by solution techniques (J. Am. Chem. Soc., DOI: 10.1021/ja909521u). The researchers studied the UV-induced conversion of dicumyl ketone to dicumene as a model system for synthesizing molecules with adjacent quaternary carbons. Laser flash photolysis of the ketone produced a nanocrystalline radical-pair triplet state, which the group observed transforming into dicumene by using time-resolved electron paramagnetic resonance spectroscopy. The work sets the stage for new depth of understanding and manipulation of organic solid-state reactions, the researchers say.

 
Chemical & Engineering News
ISSN 0009-2347
Copyright © American Chemical Society

Leave A Comment

*Required to comment