Chemist's Pursuit of Molecular Beauty May Yield Energy Breakthroughs

Omar M. Yaghi's shelves and bookcases are lined with a colorful assortment of plastic models, a seeming kaleidoscope of oversized snowflakes that give his office the whimsical feel of a toy-design workshop.

But the plastic models of molecular structures might hold the secret to virtually pollution-free automobiles and power-generation plants.

Mr. Yaghi, a professor of chemistry and biochemistry at the University of California at Los Angeles, has spent the past two decades

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