Arie Jan Haagen-Smit
Arie Jan Haagen- Smit ( born December 22, 1900 in Utrecht, † 17 March 1977 in Pasadena ) was a Dutch chemist.
Haagen- Smit studied chemistry at the University of Utrecht. In 1926 he graduated with a Master's and a doctorate in 1929. From 1929 to 1935 he worked as a research assistant to Fritz Kögl at the University of Utrecht. During this time he was involved together with Kögl and Hanni Erxleben in the discovery of auxin. From 1936 he was with Kenneth Thiemann as a lecturer in organic chemistry at the University of Cambridge. In 1937 he joined the faculty and was from 1940 to 1971 Professor of Bioorganic Chemistry at Caltech in Pasadena.
From 1948 he studied the air pollution and coined the term smog.