David Whiffen
Encyclopedia
David Hardy Whiffen FRS
(15 August 1922 – 2 December 2002) was an English physicist and pioneer of Infra-red and Electron Spin Resonance known for the "Whiffen Effect".
and continued the pursuit of postgraduate research with Thompson until 1949. He worked in a number of areas including Radar and fuel analysis during the war.
He spent a year in 1946-47 at the Bell Telephone Research Laboratories at Murray Hill, New Jersey, working with five Nobel Laureates. In nine months Whiffen developed a sensitive experimental cell usable over a wide range of temperature.
On his return to England he accepted a post as lecturer in the Chemistry Department at Birmingham University from 1949 to 1959. Most of his papers at that time pushed the boundaries on infra red absorption frequencies of materials.
He then became head of the Molecular Science Division at the National Physics Laboratory (NPL) from 1959 to 1968, leaving to be successively Head of Physical Chemistry, Professor of Physics, Dean of Science and Pro-Vice-Chancellor at Newcastle University between 1968 and 1983.
His primary area of expertise during those years was radiation and how it is absorbed by materials and what this tells us about the radiartion and the materials themselves. Whiffen worked out the electron-spin resonance signal of a free radical in a crystal lattice. He was a Spectroscopist, Chemical Physicist, Specialist in wave superposition, the interaction between radiation and matter, and a pioneer in ESR (Electron Spin Resonance) and later NMR (Nuclear Magnetic Resonance). He was elected a Fellow of the Royal Society in 1966
He retired in 1985 to Somerset where he died aged 80. He had married Jean Bell in Glasgow in 1949. Their four sons survived him.
for Chemistry in 1936 for his work on molecular structure, the theory of dipole moments in liquids and the diffraction of X-rays and electrons in gases. He was not known as self promotional, and when on arrival at Newcastle Chemistry Professor Clemo
suggested people were saying he 'shouldn't have come' he merely raised his eyebrows and nodded slightly in apparent agreement. He was seen as exceptionally effective and a memorial lecture is held in his name.
said; 'In Birmingham David Whiffen also became interested in the free radicals, thought to be involved in some polymerisations, and constructed a very early electron spin resonance (ESR) spectrometer
to investigate them, obtaining some success with powders and ã-ray irradiated powders. A study by Ubersfeld and Erb then showed that an irradiated crystal of glycine exhibited a spectrum which varied with its orientation in the magnetic field. He rapidly developed the techniques required to further such studies and the theory to interpret the results. This was world-leading research which established his reputation in the field. The paper on glycine, published in Molecular Physics in 1959, was the first of many that identified the structure of free radicals produced in irradiated crystals.'
Royal Society
The Royal Society of London for Improving Natural Knowledge, known simply as the Royal Society, is a learned society for science, and is possibly the oldest such society in existence. Founded in November 1660, it was granted a Royal Charter by King Charles II as the "Royal Society of London"...
(15 August 1922 – 2 December 2002) was an English physicist and pioneer of Infra-red and Electron Spin Resonance known for the "Whiffen Effect".
Life
He was born in Esher, Surrey into a family of chemical manufacturers and educated in Broadstairs, Kent and at Oundle. He gained a 1st Class Honours Degree at Oxford in 1943 under eminent physicist Sir Harold Warris ThompsonHarold Warris Thompson
Sir Harold Warris Thompson was an English physical chemist.He was born in Wombwell, Yorkshire, the son of William Thompson, a colliery executive, and Charlotte Emily. He was educated at King Edward VII School in Sheffield, then at Trinity College, Oxford, where he was tutored by Cyril Norman...
and continued the pursuit of postgraduate research with Thompson until 1949. He worked in a number of areas including Radar and fuel analysis during the war.
He spent a year in 1946-47 at the Bell Telephone Research Laboratories at Murray Hill, New Jersey, working with five Nobel Laureates. In nine months Whiffen developed a sensitive experimental cell usable over a wide range of temperature.
On his return to England he accepted a post as lecturer in the Chemistry Department at Birmingham University from 1949 to 1959. Most of his papers at that time pushed the boundaries on infra red absorption frequencies of materials.
He then became head of the Molecular Science Division at the National Physics Laboratory (NPL) from 1959 to 1968, leaving to be successively Head of Physical Chemistry, Professor of Physics, Dean of Science and Pro-Vice-Chancellor at Newcastle University between 1968 and 1983.
His primary area of expertise during those years was radiation and how it is absorbed by materials and what this tells us about the radiartion and the materials themselves. Whiffen worked out the electron-spin resonance signal of a free radical in a crystal lattice. He was a Spectroscopist, Chemical Physicist, Specialist in wave superposition, the interaction between radiation and matter, and a pioneer in ESR (Electron Spin Resonance) and later NMR (Nuclear Magnetic Resonance). He was elected a Fellow of the Royal Society in 1966
He retired in 1985 to Somerset where he died aged 80. He had married Jean Bell in Glasgow in 1949. Their four sons survived him.
The Whiffen Effect
Spin paired molecules. In EPR spectroscopy of organic radicals the effect explains the way hyperconjucative proton coupling in a cyclic radial can be enhanced or forbidden according to the symmetry of the orbital with which it hyperconjugates. Opening the way to other work in the field.Other significant contributions
He was known as a very practical man, but with deep intellect and understanding. He constructed a 9 GHz Spectrometer at the NPL and turned it into one of the worlds top ESR and NMR Laboratories, testing theories and models. He was the first to successfully test the predictions of the underlying theory of Peter Debye the Dutch-American theoretical physicist who received the Nobel PrizeNobel Prize
The 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...
for Chemistry in 1936 for his work on molecular structure, the theory of dipole moments in liquids and the diffraction of X-rays and electrons in gases. He was not known as self promotional, and when on arrival at Newcastle Chemistry Professor Clemo
G R Clemo
George Roger Clemo was a British organic chemist.He was born in Slapton, Devon, the eldest son of farmer George and Blanche Ellen Clemo. He attended Kingsbridge Grammar School and went on to study science at the Royal Albert Memorial College Exeter, a forerunner of the contemporary Exeter...
suggested people were saying he 'shouldn't have come' he merely raised his eyebrows and nodded slightly in apparent agreement. He was seen as exceptionally effective and a memorial lecture is held in his name.
Obituary
His obituary in The IndependentThe Independent
The Independent is a British national morning newspaper published in London by Independent Print Limited, owned by Alexander Lebedev since 2010. It is nicknamed the Indy, while the Sunday edition, The Independent on Sunday, is the Sindy. Launched in 1986, it is one of the youngest UK national daily...
said; 'In Birmingham David Whiffen also became interested in the free radicals, thought to be involved in some polymerisations, and constructed a very early electron spin resonance (ESR) spectrometer
Spectrometer
A spectrometer is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials. The variable measured is most often the light's intensity but could also, for instance, be the polarization...
to investigate them, obtaining some success with powders and ã-ray irradiated powders. A study by Ubersfeld and Erb then showed that an irradiated crystal of glycine exhibited a spectrum which varied with its orientation in the magnetic field. He rapidly developed the techniques required to further such studies and the theory to interpret the results. This was world-leading research which established his reputation in the field. The paper on glycine, published in Molecular Physics in 1959, was the first of many that identified the structure of free radicals produced in irradiated crystals.'