Hodgkin and colleagues used X-ray diffraction to determine the molecular structure of penicillin, confirming its unusual beta-lactam ring.
In 1946, after several years of intensive wartime and postwar research, Dorothy Hodgkin and her collaborators successfully determined the molecular structure of penicillin using X-ray crystallography, confirming its unusual and chemically controversial beta-lactam ring structure.
Penicillin, discovered by Alexander Fleming in 1928 and developed into a life-saving antibiotic during World War II, had a structure that chemists fiercely debated. Many prominent organic chemists doubted that the strained four-membered beta-lactam ring proposed by some researchers could actually exist in nature. Hodgkin's painstaking crystallographic analysis, conducted during wartime shortages and disrupted laboratory conditions, provided the definitive experimental proof that settled the controversy.
Her determination confirmed the correct structure and enabled chemists to understand penicillin's mechanism of action and begin efforts toward its industrial synthesis and modification, dramatically accelerating global antibiotic production at a critical historical moment when the drug was urgently needed for wounded soldiers and civilians.
This achievement showcased Hodgkin's extraordinary skill in solving structures of biological importance under difficult conditions and cemented her international reputation as one of the preeminent crystallographers of her generation, directly contributing to saving countless lives through improved antibiotic manufacturing.