During his PhD work, he contributed to the first syntheses of the cryptand ligands.
He has specialized in supramolecular chemistry. After postdoctoral research with M. L. H. Green, he returned to Strasbourg, where he is now emeritus professor. A prolific scientist, he has worked in several areas including electrochemical reduction of CO2 and models of the photosynthetic reaction center.
A large theme of his work is molecular topology, specifically mechanically-interlocked molecular architectures. He has described syntheses of catenanes and molecular knots based on coordination complexes. He is currently Professor at the Université Louis Pasteur, Strasbourg.
[French Academy of Sciences]
He was elected a correspondent member of the French Academy of Sciences on March 26, 1990, and a member on November 24, 1997.
Married Carmen Simone Boni, February 6, 1971. 1 child, Julien.