Influential Organic Chemist Dies

John Roberts, the MIT and Caltech researcher who pioneered nuclear magnetic resonance spectroscopy as a tool to elucidate molecular structure, has passed away.

Written byBob Grant
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NSF COLLECTIONThe field of physical organic chemistry lost one of its giants last month with the passing of John Roberts, the scientist who popularized the use of nuclear magnetic resonance (NMR) spectroscopy for determining chemical structures and molecular dynamics. Roberts, who spent much of his career at Caltech, died on Saturday (October 29) after having a stroke, his daughter Anne told The New York Times. He was 98.

In the 1950s, Roberts convinced Caltech and his chemistry division chairman, two-time Nobel Laureate Linus Pauling, to purchase the first NMR spectroscopy machine ever bought by a university. “This was a real revolution for organic chemists at the time,” Caltech’s Peter Dervan told the New York Times. “Jack saw the potential use of this spectroscopy and mastered it, and then, by publishing papers in this area, convinced other organic chemists that this was a powerful tool.”

Roberts’s research also contributed greatly to establishing the use of isotopic forms of atoms as tracers to track the motion of atomic particles involved in chemical reactions. The chemist also had a profound impact on the culture of science when he lobbied Caltech to begin admitting women by refusing ...

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  • From 2017 to 2022, Bob Grant was Editor in Chief of The Scientist, where he started in 2007 as a Staff Writer. Before joining the team, he worked as a reporter at Audubon and earned a master’s degree in science journalism from New York University. In his previous life, he pursued a career in science, getting a bachelor’s degree in wildlife biology from Montana State University and a master’s degree in marine biology from the College of Charleston in South Carolina. Bob edited Reading Frames and other sections of the magazine.

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