Jean Louis Charles Jeener (31 July 1931 – 10 June 2023) was 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 on 31 July 1931, son of biologist Raymond Jeener and Hélène Massar. He was married to Françoise Henin. Jenner died on 10 June 2023, at the age of 91.[1]