John Lennard-Jones

Sir John Edward Lennard-Jones

Early life and education Lennard-Jones was born John Edward Jones on 27 October 1894 at Leigh, Lancashire, the eldest son of Mary Ellen and Hugh Jones, an insurance agent. He was educated at Leigh Grammar School, going on to study at the University of Manchester, graduating in 1915 with a first-class honours degree in mathematics. Following service with the Royal Flying Corps during World War I, where he trained as a pilot, he studied for a Doctorate of Science (DSc) degree in Mathematics at Manchester, graduating in 1922. On the advice of Sydney Chapman, he then successfully applied for a Senior 1851 Exhibition at Trinity College, Cambridge, where he was supervised by Ralph H. Fowler and graduated with a second doctorate in 1924.

Career Lennard-Jones is well known among scientists for his work on molecular structure, valency and intermolecular forces. Much research of these topics over several decades grew from a paper he published in 1929. Subsequently, he returned to the University of Cambridge and was then appointed as the first Chair of Theoretical Chemistry in the United Kingdom. There, he established a research school applying to phenomena in physics and organic chemistry new concepts of quantum mechanics and the interactions of subatomic particles. The department attracted many notable scientists and mathematicians, including S.F. Boys, C.A. Coulson, G.G. Hall, A. Hurley, and J. Pople.

Atoms of a noble gas interact via a potential in which an attracting van der Waals force balances a repelling force which results from overlapping electron orbits. A well-known approximation to this potential is the so-called Lennard-Jones potential, a description of the potential energy as a function of the separation of the atoms. Also named after him, the Lennard-Jones Laboratory houses the School of Chemistry and Physics at Keele University. The Royal Society of Chemistry awards a Lennard-Jones Medal and hosts the Lennard-Jones lecture every second year.

Keele University holds a collection of Lennard-Jones's published work, as well as a laboratory named in his honour. Professor C.A. Coulson's collected lecture notes from 1928 to 1932, held in Cambridge University Library, record Lennard-Jones' lectures. Coulson wrote 'I suspect that these are the first lectures on theoretical chemistry (or perhaps more accurately quantum chemistry) that had been given in Britain'. Lennard-Jones's private papers are held at Churchill Archives Centre, in Cambridge.

On 26 August 1925 he married Kathleen Mary Lennard, and added her surname to his own to become Lennard-Jones. The couple had two children, John and Mary. He died of cancer at Stoke-on-Trent on 1 November 1954. on conjugated hydrocarbons 1937 First Director of University of Cambridge Mathematical Laboratory (now the Department of Computer Science and Technology) with Maurice Wilkes as researcher. 1939 At outbreak of war, seconded as Chief Superintendent of Armament Research to the Ministry of Supply which took over the mathematical laboratory for ballistics calculations, developed a team of mathematicians for this purpose. 1942–5 Director-General of Scientific Research (Defence), Ministry of Supply 1942–7 Member of the Advisory Council of the Department of Scientific and Industrial Research. 1946 Knighted (KBE), returns to Cambridge 1947–53 Chairman of the Scientific Advisory Council at the Ministry of Supply 1948–50 President of the Faraday Society 1949 Paper at the University of Cambridge is named in his honour.

The school of chemistry/medicinal chemistry and physics at Keele university is named after him.