Gerhard Herzberg (1904-1999) was a renowned German-born Canadian physicist and chemist who made significant contributions to the field of molecular spectroscopy. He is best known for his work on the structure of molecules and the behavior of atoms in various states. Herzberg's research helped to elucidate the electronic structure of diatomic and polyatomic molecules, and he developed techniques for studying how these molecules interact with light.
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Gerhard Herzberg investigated molecular electronic structure and geometry through spectroscopy, especially for reactive radicals. Rotational, vibrational, and electronic features provide complementary information about a molecule's structure and energy levels.
This makes spectroscopy a way to study species that are difficult to isolate in bulk. Herzberg's contributions to molecular structure, particularly free radicals, were recognized by the 1971 Nobel Prize in Chemistry.[ref]
Portrait of Gerhard Herzberg
. GFHund; photograph from Friedrich Hund's estate, held by Gerhard Hund. CC BY 3.0, via Wikimedia Commons. Source.