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The Nobel Prize in Chemistry 1956
before March 9, 2006

"for his researches into the mechanism of chemical reactions"


Nikolai Nikolaevic Semenov was born in Saratov on April 3, 1896. He graduated from Petrograd University in 1917 and in 1920 he took charge of the electron phenomena laboratory of the Leningrad Physico-Technical Institute. He lectured at the Polytechnical Institute and was appointed Professor in 1928. In 1931, he became Director of the Institute of Chemical Physics of the U.S.S.R. Academy of Sciences (which has moved to Moscow in 1943); from 1944 he has been a Professor at the Moscow State University.

Semenov's outstanding work on the mechanism of chemical transformation includes an exhaustive analysis of the application of the chain theory to varied reactions and, more especially, to combustion processes. He proposed a theory of degenerate branching which led to a better understanding of the phenomena associated with the induction periods of oxidation processes. Semenov has made valuable contributions to the field of molecular physics; he has also carried out investigations on electron phenomena, dielectric breakdown and the propagation of explosive waves.

Semenov has written two important books concerned with his work. Chemical Kinetics and Chain Reactions was published in 1934 with an English edition in 1935. It was the first book in the U.S.S.R. to develop a detailed theory of unbranched and branched chain reactions in chemistry. Some Problems of Chemical Kinetics and Reactivity, first published in 1954, was revised in 1958; there are also English, American, German, and Chinese editions.

He became a Corresponding Member of the U.S.S.R. Academy of Sciences in 1929 and Academician in 1932: he was awarded five Orders of Lenin and the Order of Red Banner of Labour. He is a member of the Chemical Society (London), Foreign Member of the Royal Society, and foreign member of the American, Indian, German, and Hungarian Academies of Sciences. He also holds Honorary Doctorate degrees of Oxford and Brussels Universities, and since 1960 he has been Chairman of the All-Union Society for Propagation of Political and Scientific Knowledge.

He married Natalya Nikolaevna Semenova; they have one son and one daughter.

From Nobel Lectures, Chemistry 1942-1962, Elsevier Publishing Company, Amsterdam, 1964

This autobiography/biography was written at the time of the award and later published in the book series Les Prix Nobel/Nobel Lectures. The information is sometimes updated with an addendum submitted by the Laureate. To cite this document, always state the source as shown above.

Nikolay Semenov died on September 25, 1986

Link to Nikolay Semenov's Nobel Lecture:
Link to Nikolay Semenov's Banquet Speech:

Tags: Nobel Prize Russian science    

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