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Discovery of new family of pseudo-metallic chemicals

COLUMBIA, Mo. The periodic table of elements, all 111 of them, just got a little competition. A new discovery by a University of Missouri-Columbia research team, published in Angewandte Chemie, the journal of the German Society of Chemists, allows scientists to manipulate a molecule discovered 50 years ago in such as way as to give the molecule metal-like properties, creating a new, "pseudo" element. The pseudo-metal properties can be adjusted for a wide range of uses and might change the way scientists think about attacking disease or even building electronics.

Five decades ago, Fred Hawthorne, professor of radiology and director of the International Institute for Nano and Molecular Medicine at MU, discovered an extremely stable molecule consisting of 12 boron atoms and 12 hydrogen atoms. Known as "boron cages," these molecules were difficult to change or manipulate, and sat dormant in Hawthorne's laboratory for many years.

Recently, Hawthorne's scientific team found a way to modify these cages, resulting in a large, new family of nano-sized compounds. In their study, which was published this month, Hawthorne, and Mark Lee, assistant professor at the institute and first author of the study, found that attaching different compounds to the cages gave them the properties of many different metals.

"Since the range of properties for these pseudo-metals is quite large, they might be referred to as 'psuedo-elements belonging to a completely new pseudo-periodic table,'" Lee said. Potential applications of this discovery are abundant, especially in medicine.

"All living organisms are essentially a grand concert of chemical reactions involving the transfer of electrons between molecules and metals,'" Lee said. "The electron transfer properties of this new family of molecules span the entire range of those found within living systems. Because of this, these pseudo-metals may be tuned for use as specific probes in living system
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Contact: Christian Basi
BasiC@missouri.edu
573-882-4430
University of Missouri-Columbia
24-Apr-2007


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