Nikolay Semyonov
Encyclopedia
Nikolay Nikolayevich Semyonov (April 15 (April 3, Old Style
Julian calendar
The Julian calendar began in 45 BC as a reform of the Roman calendar by Julius Caesar. It was chosen after consultation with the astronomer Sosigenes of Alexandria and was probably designed to approximate the tropical year .The Julian calendar has a regular year of 365 days divided into 12 months...
), 1896 – September 25, 1986) was a Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
n/Soviet
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....
physicist
Physicist
A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...
and chemist
Chemistry
Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties. Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds....
. Semyonov was awarded the 1956 Nobel Prize in Chemistry
Nobel Prize in Chemistry
The Nobel Prize in Chemistry is awarded annually by the Royal Swedish Academy of Sciences to scientists in the various fields of chemistry. It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895, awarded for outstanding contributions in chemistry, physics, literature,...
for his work on the mechanism of chemical transformation.
Life
Semyonov was born in SaratovSaratov
-Modern Saratov:The Saratov region is highly industrialized, due in part to the rich in natural and industrial resources of the area. The region is also one of the more important and largest cultural and scientific centres in Russia...
and graduated from the department of physics
Physics
Physics is a natural science that involves the study of matter and its motion through spacetime, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.Physics is one of the oldest academic...
of Petrograd University
Saint Petersburg State University
Saint Petersburg State University is a Russian federal state-owned higher education institution based in Saint Petersburg and one of the oldest and largest universities in Russia....
(1913–1917), where he was a student of Abram Fyodorovich Ioffe
Abram Ioffe
Abram Fedorovich Ioffe was a prominent Russian/Soviet physicist. He received the Stalin Prize , the Lenin Prize , and the Hero of Socialist Labor . Ioffe was an expert in electromagnetism, radiology, crystals, high-impact physics, thermoelectricity and photoelectricity...
. In 1918, he moved to Samara
Samara, Russia
Samara , is the sixth largest city in Russia. It is situated in the southeastern part of European Russia at the confluence of the Volga and Samara Rivers. Samara is the administrative center of Samara Oblast. Population: . The metropolitan area of Samara-Tolyatti-Syzran within Samara Oblast...
, where he was enlisted into Kolchak
Aleksandr Kolchak
Aleksandr Vasiliyevich Kolchak was a Russian naval commander, polar explorer and later - Supreme ruler . Supreme ruler of Russia , was recognized in this position by all the heads of the White movement, "De jure" - Kingdom of Serbs, Croats and Slovenes, "De facto" - Entente States...
's White Army
White movement
The White movement and its military arm the White Army - known as the White Guard or the Whites - was a loose confederation of Anti-Communist forces.The movement comprised one of the politico-military Russian forces who fought...
during Russian Civil War
Russian Civil War
The Russian Civil War was a multi-party war that occurred within the former Russian Empire after the Russian provisional government collapsed to the Soviets, under the domination of the Bolshevik party. Soviet forces first assumed power in Petrograd The Russian Civil War (1917–1923) was a...
.
In 1920, he returned to Petrograd
Saint Petersburg
Saint Petersburg is a city and a federal subject of Russia located on the Neva River at the head of the Gulf of Finland on the Baltic Sea...
and took charge of the electron
Electron
The electron is a subatomic particle with a negative elementary electric charge. It has no known components or substructure; in other words, it is generally thought to be an elementary particle. An electron has a mass that is approximately 1/1836 that of the proton...
phenomena laboratory of the Petrograd Physico-Technical Institute
Ioffe Physico-Technical Institute
Ioffe Physical-Technical Institute of the Russian Academy of Sciences is one of Russia's largest research centers specialized in physics and technology. The institute was established in 1918 in Petrograd and run for several decades by Abram Fedorovich Ioffe...
. He also became he vice-director of the intstitute. In 1921, he married philologist
Philology
Philology is the study of language in written historical sources; it is a combination of literary studies, history and linguistics.Classical philology is the philology of Greek and Classical Latin...
Maria Boreishe-Liverovsky (student of Zhirmunsky). She died two years later. In 1923, Nikolay married Maria's niece Natalia Nikolayevna Burtseva. She brought Nikolay a son (Yuri) and a daughter (Lyudmila).
During that difficult time, Semyonov, together with Pyotr Kapitsa
Pyotr Kapitsa
Pyotr Leonidovich Kapitsa was a prominent Soviet/Russian physicist and Nobel laureate.-Biography:Kapitsa was born in the city of Kronstadt and graduated from the Petrograd Polytechnical Institute in 1918. He worked for over ten years with Ernest Rutherford in the Cavendish Laboratory in Cambridge...
, discovered a way to measure the magnetic field
Magnetic field
A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude ; as such it is a vector field.Technically, a magnetic field is a pseudo vector;...
of an atomic nucleus
Atomic nucleus
The nucleus is the very dense region consisting of protons and neutrons at the center of an atom. It was discovered in 1911, as a result of Ernest Rutherford's interpretation of the famous 1909 Rutherford experiment performed by Hans Geiger and Ernest Marsden, under the direction of Rutherford. The...
(1922). Later the experimental setup was improved by Otto Stern
Otto Stern
Otto Stern was a German physicist and Nobel laureate in physics.-Biography:Stern was born in Sohrau, now Żory in the German Empire's Kingdom of Prussia and studied at Breslau, now Wrocław in Lower Silesia....
and Walther Gerlach and became known as Stern-Gerlach experiment.
In 1925, Semyonov, together with Yakov Frenkel
Yakov Frenkel
Yakov Il'ich Frenkel, was a Soviet physicist renowned for his works in the field of solid-state physics. He is also known as Jacov Frenkel....
, studied kinetics
Kinetic theory
The kinetic theory of gases describes a gas as a large number of small particles , all of which are in constant, random motion. The rapidly moving particles constantly collide with each other and with the walls of the container...
of condensation
Condensation
Condensation is the change of the physical state of matter from gaseous phase into liquid phase, and is the reverse of vaporization. When the transition happens from the gaseous phase into the solid phase directly, the change is called deposition....
and adsorption
Adsorption
Adsorption is the adhesion of atoms, ions, biomolecules or molecules of gas, liquid, or dissolved solids to a surface. This process creates a film of the adsorbate on the surface of the adsorbent. It differs from absorption, in which a fluid permeates or is dissolved by a liquid or solid...
of vapor
Vapor
A vapor or vapour is a substance in the gas phase at a temperature lower than its critical point....
s. In 1927, he studied ion
Ion
An ion is an atom or molecule in which the total number of electrons is not equal to the total number of protons, giving it a net positive or negative electrical charge. The name was given by physicist Michael Faraday for the substances that allow a current to pass between electrodes in a...
isation in gas
Gas
Gas is one of the three classical states of matter . Near absolute zero, a substance exists as a solid. As heat is added to this substance it melts into a liquid at its melting point , boils into a gas at its boiling point, and if heated high enough would enter a plasma state in which the electrons...
es and published an important book, Chemistry of the Electron. In 1928, he, together with Vladimir Fock
Vladimir Fock
Vladimir Aleksandrovich Fock was a Soviet physicist, who did foundational work on quantum mechanics and quantum electrodynamics....
, created a theory of thermal disruptive discharge of dielectric
Dielectric
A dielectric is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed in an electric field, electric charges do not flow through the material, as in a conductor, but only slightly shift from their average equilibrium positions causing dielectric...
s.
He lectured at the Petrograd Polytechnical Institute and was appointed Professor in 1928. In 1931, he organized the Institute of Chemical Physics of the U.S.S.R. Academy of Sciences
Russian Academy of Sciences
The Russian Academy of Sciences consists of the national academy of Russia and a network of scientific research institutes from across the Russian Federation as well as auxiliary scientific and social units like libraries, publishers and hospitals....
(which has moved to Chernogolovka
Chernogolovka
Chernogolovka is a town in Moscow Oblast, Russia, located northeast from Moscow border. Population: Chernogolovka does not have a rail link but long distance buses link the town to Moscow, Noginsk and Fryanovo.-Research facilities:...
in 1943) and became its first director. In 1932, he became a full member of the Soviet Academy of Sciences.
Significant works
Semyonov's outstanding work on the mechanism of chemical transformation includes an exhaustive analysis of the application of the chainChain reaction
A chain reaction is a sequence of reactions where a reactive product or by-product causes additional reactions to take place. In a chain reaction, positive feedback leads to a self-amplifying chain of events....
theory to varied reactions (1934–1954) and, more significantly, to combustion
Combustion
Combustion or burning is the sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species. The release of heat can result in the production of light in the form of either glowing or a flame...
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.
Semyonov wrote two important books outlining 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. In 1956, he was awarded the Nobel Prize in Chemistry
Nobel Prize in Chemistry
The Nobel Prize in Chemistry is awarded annually by the Royal Swedish Academy of Sciences to scientists in the various fields of chemistry. It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895, awarded for outstanding contributions in chemistry, physics, literature,...
(together with Sir Cyril Norman Hinshelwood
Cyril Norman Hinshelwood
Sir Cyril Norman Hinshelwood OM PRS was an English physical chemist.Born in London, his parents were Norman Macmillan Hinshelwood, a chartered accountant, and Ethe Frances née Smith. He was educated first in Canada, returning in 1905 on the death of his father to a small flat in Chelsea where he...
) for this work.
Honours and awards
- Orders of LeninOrder of LeninThe Order of Lenin , named after the leader of the Russian October Revolution, was the highest decoration bestowed by the Soviet Union...
, nine times (incl. 1945, 1953, 1956, 1966, 1971, 1976, 1981) - Stalin Prize (1941, 1949)
- Honorary Member of the British Chemical Society (1943)
- Order of the Red Banner of LabourOrder of the Red Banner of LabourThe Order of the Red Banner of Labour was an order of the Soviet Union for accomplishments in labour and civil service. It is the labour counterpart of the military Order of the Red Banner. A few institutions and factories, being the pride of Soviet Union, also received the order.-History:The Red...
(1946) - Honorary member of the Indian Academy of SciencesIndian Academy of SciencesThe Indian Academy of Sciences, Bangalore was founded by Sir C. V. Raman, and was registered as a Society on 24 April 1934. Inaugurated on 31 July 1934, it began with 65 founding fellows. The first general meeting of Fellows, held on the same day, elected Professor Raman as President, and adopted...
(1954) - Nobel PrizeNobel PrizeThe Nobel Prizes are annual international awards bestowed by Scandinavian committees in recognition of cultural and scientific advances. The will of the Swedish chemist Alfred Nobel, the inventor of dynamite, established the prizes in 1895...
in Chemistry (1956) - Foreign Member of the Royal Society of London (1958)
- Member of the German Academy of Naturalists (1959)
- Honorary member of the Hungarian Academy of SciencesHungarian Academy of SciencesThe Hungarian Academy of Sciences is the most important and prestigious learned society of Hungary. Its seat is at the bank of the Danube in Budapest.-History:...
(1961) - Honorary member of the New York Academy of SciencesNew York Academy of SciencesThe New York Academy of Sciences is the third oldest scientific society in the United States. An independent, non-profit organization with more than members in 140 countries, the Academy’s mission is to advance understanding of science and technology...
(1962) - Foreign member of the United States National Academy of SciencesUnited States National Academy of SciencesThe National Academy of Sciences is a corporation in the United States whose members serve pro bono as "advisers to the nation on science, engineering, and medicine." As a national academy, new members of the organization are elected annually by current members, based on their distinguished and...
(1963) - Honorary Member of the Romanian AcademyRomanian AcademyThe Romanian Academy is a cultural forum founded in Bucharest, Romania, in 1866. It covers the scientific, artistic and literary domains. The academy has 181 acting members who are elected for life....
(1965) - Hero of Socialist Labour, twice (1966, 1976)
- Lomonosov Gold MedalLomonosov Gold MedalThe Lomonosov Gold Medal, named after Russian scientist and polymath Mikhail Lomonosov, is awarded each year since 1959 for outstanding achievements in the natural sciences and the humanities by the USSR Academy of Sciences and later the Russian Academy of Sciences . Two medals are awarded...
(1969) - Lenin PrizeLenin PrizeThe Lenin Prize was one of the most prestigious awards of the USSR, presented to individuals for accomplishments relating to science, literature, arts, architecture, and technology. It was created on June 23, 1925 and was awarded until 1934. During the period from 1935 to 1956, the Lenin Prize was...
(1976) - Order of the October RevolutionOrder of the October RevolutionThe Order of the October Revolution was instituted on October 31, 1967, in time for the 50th anniversary of the October Revolution. It was awarded to individuals or groups for services furthering communism or the state, or in enhancing the defenses of the Soviet Union, military and civil...
(1986) - Medal "In commemoration of the centenary of the birth of Vladimir Ilyich Lenin"
- Mendeleev Prize
Semyonov was also an Honorary Doctor of several universities: Oxford
University of Oxford
The University of Oxford is a university located in Oxford, United Kingdom. It is the second-oldest surviving university in the world and the oldest in the English-speaking world. Although its exact date of foundation is unclear, there is evidence of teaching as far back as 1096...
(1960), Brussels (1962), London
University of London
-20th century:Shortly after 6 Burlington Gardens was vacated, the University went through a period of rapid expansion. Bedford College, Royal Holloway and the London School of Economics all joined in 1900, Regent's Park College, which had affiliated in 1841 became an official divinity school of the...
(1965), Budapest Technical University (1965), Polytechnic Institute of Milan (1964) and others.
External links
- Semyonov's Nobel Foundation biography
- Semyonov's Nobel Lecture Some Problems Relating to Chain Reactions and to the Theory of Combustion
- N.N. Semenov Institute of Chemical Physics