Fraser Stoddart

Northwestern University

Sir James Fraser Stoddart (1942-2024) was a Scottish-American chemist and Board of Trustees Professor of Chemistry at Northwestern University, where he led the Stoddart Mechanostereochemistry Group. He shared the 2016 Nobel Prize in Chemistry with Jean-Pierre Sauvage and Bernard Feringa for the design and synthesis of molecular machines. Stoddart pioneered the use of molecular recognition and self-assembly to build mechanically interlocked molecules — rotaxanes, catenanes and molecular Borromean rings — in which components are held together by mechanical bonds rather than covalent ones. By engineering controllable relative motion into these architectures he created molecular switches and the first artificial molecular 'muscles,' laying the foundation for nanoscale machines, molecular electronics and stimuli-responsive materials. His template-directed synthesis of the cyclobis(paraquat-p-phenylene) 'blue box' receptor became a workhorse of supramolecular chemistry. Beyond the bench, Stoddart was an unusually prolific translator of fundamental discovery into commerce: he co-founded PanaceaNano and its Noble Panacea skincare brand, which uses organic molecular frameworks to encapsulate and time-release active ingredients, and in 2021 he co-founded H2MOF to attack hydrogen storage with metal-organic frameworks. With more than a thousand publications and an interlocked-molecule patent estate spanning template-directed rotaxane synthesis, his Mechanostereochemistry Group remained one of academia's most direct conduits from blue-box host-guest chemistry to shipped product.