Jean Jeener
Encyclopedia
Jean Louis Charles Jeener is a Belgian physical chemist and physicist, well known for his experimental and theoretical contributions to spin thermodynamics in solids and for his invention of Two-dimensional nuclear magnetic resonance spectroscopy. He was born in Brussels in 1931, son of Raymond Jeener
(biologist) and Hélène Massar. He is married to Françoise Henin.
(ULB) from 1960 until he retired in 1996.
At ULB, Jeener researched spin thermodynamics and spin dynamics in solids. He introduced the “Jeener-Broekaert sequence” for creating observable quantities of dipolar order in solids.
pulses is treated by a double Fourier transformation with respect to the delay between the pulses, and the delay after the second pulse. This technique gives detailed information about the molecular links between atoms, inaccessible with previous techniques.
The first experimental demonstration of this technique was carried out by Richard R. Ernst
(Nobel prize 1991).
Later, Jeener introduced a variant of 2DNMR, today known as Nuclear Overhauser Effect Spectroscopy
(NOESY), that gives detailed information about the spin-lattice relaxation matrix, and about the spatial relation between atoms in complex molecules.
2DNMR and its multi-dimensional extensions reveal so much more information about the chemical and physical environment of the spins that they have since been used in almost all fields of NMR. Among other applications, they enable detailed reconstruction of the 3-dimensional structure of complex biological macro molecules.
.
, is named after him.
Raymond Jeener
Raymond Jeener was a Belgian molecular biologist and professor at the Universite Libre de Bruxelles . In 1954, he was awarded the Francqui Prize on Biological and Medical Sciences.-References:...
(biologist) and Hélène Massar. He is married to Françoise Henin.
Career
Jeener was professor in Professor in Physics at Université Libre de BruxellesUniversité Libre de Bruxelles
The Université libre de Bruxelles is a French-speaking university in Brussels, Belgium. It has 21,000 students, 29% of whom come from abroad, and an equally cosmopolitan staff.-Name:...
(ULB) from 1960 until he retired in 1996.
At ULB, Jeener researched spin thermodynamics and spin dynamics in solids. He introduced the “Jeener-Broekaert sequence” for creating observable quantities of dipolar order in solids.
Nuclear magnetic resonance spectroscopy
Jeener is best known for introducing two-dimensional NMR spectroscopy. In a lecture at the AMPERE Summer School in Basko Polje, Yugoslavia, September 1971, he proposed a novel technique, later known as Correlation Spectroscopy (COSY), in which the response of the nuclear spins to two radio frequencyRadio frequency
Radio frequency is a rate of oscillation in the range of about 3 kHz to 300 GHz, which corresponds to the frequency of radio waves, and the alternating currents which carry radio signals...
pulses is treated by a double Fourier transformation with respect to the delay between the pulses, and the delay after the second pulse. This technique gives detailed information about the molecular links between atoms, inaccessible with previous techniques.
The first experimental demonstration of this technique was carried out by Richard R. Ernst
Richard R. Ernst
Richard Robert Ernst is a Swiss physical chemist and Nobel Laureate.Born in Winterthur, Switzerland, Ernst was awarded the Nobel Prize in Chemistry in 1991 for his contributions towards the development of Fourier Transform nuclear magnetic resonance spectroscopy while at Varian Associates, Palo...
(Nobel prize 1991).
Later, Jeener introduced a variant of 2DNMR, today known as Nuclear Overhauser Effect Spectroscopy
Nuclear Overhauser effect
The Nuclear Overhauser Effect is the transfer of nuclear spin polarization from one nuclear spin population to another via cross-relaxation. It is a common phenomenon observed by nuclear magnetic resonance spectroscopy. The theoretical basis for the NOE was described and experimentally verified...
(NOESY), that gives detailed information about the spin-lattice relaxation matrix, and about the spatial relation between atoms in complex molecules.
2DNMR and its multi-dimensional extensions reveal so much more information about the chemical and physical environment of the spins that they have since been used in almost all fields of NMR. Among other applications, they enable detailed reconstruction of the 3-dimensional structure of complex biological macro molecules.
.
Recognition
Jeener is recipient of several distinctions, including the Prix Quinquennal of the Fonds National de la Recherche Scientifique (Prix Dr. A. De Leeuw-Damry-Bourlart), the Prix Ampère, the ISMAR Prize, and the Russell Varian Prize. He is Doctor Honoris Causa of ETH-Zürich. The Jean Jeener NMR Centre, inaugurated in 2010 at the Vrije Universiteit BrusselVrije Universiteit Brussel
The Vrije Universiteit Brussel is a Flemish university located in Brussels, Belgium. It has two campuses referred to as Etterbeek and Jette.The university's name is sometimes abbreviated by "VUB" or translated to "Free University of Brussels"...
, is named after him.